Locking Assemblies & Locking Elements

Transcription

1 US Locking Assemblies & Locking Elements Partner for Performance

2 Welcome to your system supplier for every aspect of power transmission Today s RINGFEDER POWER TRANSMISSION GMBH was founded in 1922 in Krefeld, Germany as patent exploitation company for Friction Springs. Today we are a global supplier of top-quality products for the power transmission- and damping technology industries. RINGFEDER POWER TRANS- MISSION is one of the leading companies in selected market niches. Through our sustainable, organic growth, targeted acquisitions and attentive proximity to our customers, we are constantly supplementing and developing our range of products in cooperation with our customers and deliver service for the future. Beyond that, RINGFEDER POWER TRANS- MISSION is one of the prime addresses in regard to technical know-how for our discerning customers. 2

3 Mars Rover: Courtesy NASA/ JPL-Caltech Our world-renowned German brands RINGFEDER, TSCHAN and GERWAH stand for customer-oriented solutions that fulfil the highest requirements and guarantee our customers a trouble-free system operation. Under the brand name ECOLOC we offer reliable products off the shelf. The brand RINGFEDER is world s leading in the sector of locking devices and damping technology. The GERWAH brand stands for torsionally rigid, elastic couplings as well as safety couplings in the lower torque range, whereas TSCHAN stands for non-shiftable elastic, highly-elastic and torsionally rigid shaft couplings in the higher torque range. The ECOLOC brand includes cost-efficient alternatives from the premium range available for standard use. Hence, the product portfolio comprises high-quality products with the best cost-benefit ratio, covering all aspects of power transmission. 3

4 Locking Assemblies Characteristics... Page 8 RINGFEDER RfN 7012-IN/ Page 10 RINGFEDER RfN Page 16 RINGFEDER RfN IN/ Page 20 RINGFEDER RfN IN/ Page 24 RINGFEDER RfN Page 28 RINGFEDER RfN Page 30 RINGFEDER RfN Page 32 Content RINGFEDER RfN Page 34 Locking Assemblies with central lock nut RINGFEDER RfN Page 38 RINGFEDER RfN Page 40 RINGFEDER RfN Page 42 RINGFEDER RfN 7090 stainless steel... Page 44 Locking Assemblies for bending loads Characteristics... Page 48 RINGFEDER RfN Page 50 RINGFEDER RfN Page 54 RINGFEDER RfN Page 56 Content RINGFEDER RfN Page 58 RINGFEDER RfN Page 60 All technical details and information are non-binding and cannot be used as a basis for legal claims. The user is obligated to determine whether the represented products meet his requirements. We reserve the right at all times to carry out modifications in the interests of technical progress. Upon the issue of this catalogue all previous brochures and questionnaires on the products displayed are no longer valid. 4

5 Content Locking Elements Characteristics... Page 64 RINGFEDER RfN Page 66 RINGFEDER RfN 8006 GSA... Page 70 Content Locking Assemblies STAINLESS STEEL Characteristics... Page 74 RINGFEDER RfN 7012-IN/ Page 76 RINGFEDER RfN Page 80 RINGFEDER RfN Page 82 RINGFEDER RfN Page 84 Locking Elements RINGFEDER RfN Page 86 Special Solutions Special Locking Assemblies... Page 88 Calculation of hub and shaft Page 92 Installation and removal instructions Locking Assemblies... Page 94 Locking Elements... Page 108 Content 5

6 RINGFEDER Locking Assemblies 6

7 RfN 7012 RfN RfN RfN RfN 7014 RfN RfN RfN

8 RINGFEDER Locking Assemblies Characteristics Inexpensive manufacture the large tolerances that are possible and the simple turning process guarantee inexpensive manufacture. Simple installation only a few screws need to be tightened, alignment to precise angles between the hub and shaft is possible in any position, no fitting work is required. Simple dismantling RINGFEDER Locking Assemblies are fitted with threaded extraction holes, so that no additional auxiliary equipment is necessary, series RfN 7012 is self-releasing. Large constant reverse-torsion fatigue strength shaft and hub are ungrooved, so that there is no weakening of these components. Shaft and hub can be designed to be considerably smaller (light, cost and space-saving design possible). No danger of deflection RINGFEDER Locking Assemblies are absolutely backlashfree. Effect similar to overload protection after the set frictional connection force has been exceeded the Locking Assemblies simply slide. Valuable machine parts are protected. The Locking Assemblies are subject to the same laws as any other connection with force transmission by friction - not suitable as sliding clutch. Completely maintenance-free no follow-up costs. 8

9 Explanations to tables Basic dimensions when screws are not tightened d d D D B1 L L 1 L 3 L 4 T F ax p W p N n Sc D G SW T A = Inner diameter (decimal notation) = Inner ring diameter = Outer diameter = Collar outer diameter = Overall length = Overall length without screws = Width of inner ring = Installation length up to collar = Transmissible torque at given T A = Transmissible axial force = Surface pressure on shaft at given T A = Surface pressure on hub at given T A = Quantity of screws = Thread = Wrench size = Max. tightened torque of the clamping screws D N min = Min. hub outer diameter depending of the given hub yield point (Rp 0,2 ) T max Gw = Maximum transmissible torque = Weight 9

10 RINGFEDER Locking Assemblies RfN 7012-IN L N 2 L 3 ø DN Characteristics As the industry standard, the RfN 7012/RfN 7012-IN Locking Assembly is suitable for most applications. Transmission of high loads up to 4 RfN 7012/RfN IN Locking Assemblies can be used in series, the transmissible torques and axial forces are added. (Please contact our specialists for assistance). Locking Assembly RfN 7012 Location Calculation of hubs see on page (Calculation possible for other hub forms in our calculation program) L L 1 L 3 Bending moment and radial loads Combined loads can be transmitted. (Please contact our specialists for assistance). d D Simplified manufacture RfN 7012/RfN 7012-IN Locking Assemblies can bridge large clearances without the loss of transmission values. Low risk to contamination During the tightening process the functional surfaces of the device are under pressure, sufficient enough to keep contaminants out, thereby preserving the integrity of the device. Locking Assembly RfN 7012 Dimensions Adjustable transmission values The screw tightening torque can be varied, thus allowing for different torque transmission values. RfN 7012/RfN 7012-IN Locking Assemblies can be tightened and released repeatedly. Example applications: Sprockets, gears, coupling hubs, conveyor pulleys, idler wheels, sheaves Locking Assembly RfN 7012 Belt pulley 10

11 Locking Assembly dimensions Transmissible torques Surface pressure Locking screws D N min at or axial forces ISO R p0,2 Shaft Hub d d x D L L 1 L 3 T F ax p W p N n Sc D G SW T A Gw D HG [N/mm 2 ] inch inch inch ft-lbs lbs psi pcs. mm ft-lbs lbs inch inch /4 x M 6 x x M 6 x /8 x M 6 x /16 x M 6 x /4 x M 6 x /8 x M 6 x /16 x M 6 x /2 x M 6 x /8 x M 8 x /16 x M 8 x /4 x M 8 x /8 x M 8 x /16 x M 8 x x M 8 x /8 x M 8 x /16 x M 8 x /4 x M 8 x /8 x M 8 x /16 x M 8 x /2 x M 8 x /16 x M 8 x /8 x M 10 x /16 x M 10 x /4 x M 10 x /8 x M 10 x /16 x M 10 x x M 10 x /8 x M 10 x /4 x M 10 x /8 x M 10 x /16 x M 10 x /2 x M 10 x /4 x M 10 x /16 x M 12 x x M 12 x /16 x M 12 x /2 x M 12 x /16 x M 12 x x M 12 x /2 x M 12 x x M 12 x /2 x M 14 x x M 14 x /2 x M 14 x /8 x M 14 x Explanations to tables: Page 9 To continue see next page RfN 7012-IN 11

12 RINGFEDER Locking Assemblies RfN 7012 L N 2 L 3 ø DN Locking Assembly RfN 7012 Location Calculation of hubs see on page (Calculation possible for other hub forms in our calculation program) L L 1 L 3 d D Locking Assembly RfN 7012 Dimensions 12

13 Locking Assembly dimensions Transmissible torques Surface pressure Locking screws D N min at or axial forces ISO Rp 0,2 Shaft Hub d x D d x D L L 1 L 3 T F ax p W p N n Sc D G T A Gw [N/mm 2 ] T max mm inch inch ft-lbs lbs psi pcs. ft-lbs lbs inch ft-lbs 19 x x M 6 x x x M 6 x x x M 6 x x x M 6 x x x M 6 x x x M 6 x x x M 6 x x x M 6 x x x M 6 x x x M 6 x x x M 6 x x x M 8 x x x M 8 x x x M 8 x x x M 8 x x x M 8 x x x M 8 x x x M 8 x x x M 10 x x x M 10 x x x M 10 x x x M 10 x x x M 10 x x x M 10 x x x M 12 x x x M 12 x x x M 12 x x x M 12 x x x M 12 x x x M 12 x x x M 12 x x x M 14 x x x M 14 x x x M 14 x x x M 14 x x x M 16 x x x M 16 x x x M 16 x x x M 18 x x x M 18 x x x M 20 x x x M 20 x x x M 22 x x x M 22 x x x M 22 x x x M 22 x x x M 24 x x x M 24 x x x M 24 x x x M 24 x x x M 24 x Explanations to tables: Page 9 To continue see next page RfN

14 RINGFEDER Locking Assemblies RfN 7012 Characteristics Slimmest design, especially suitable for applications where space is limited. The not self-centering Locking Assembly RfN 7012 compensates small tolerance deviations and compensates small mounting errors. Large transmittable forces and moments several Locking Assemblies RfN 7012 can be placed one behind the other. The transmissible torque and axial forces are added - please take in this respect consulting with our technical experts. Bending moment and radial loads combined loads can be transmitted. (Please contact our technical department for assistance). Easy installation Locking Assemblies RfN 7012 can bridge large clearances without the loss of transmission values. Low risk to contamination during the tightening process the functional surfaces of the device and connection are pressed together generating a surface pressure that does not allow the ingress of contamination. Free from wear the Locking Assembly RfN 7012 works without moving parts on shaft and hub, through this, abrasive wear and backlash are avoided. Thus, RfN 7012 can be repeatedly clamped and released. Example applications: Chain wheels, levers, pulleys, slip-on gear mechanisms, belt drums, running wheels, cable sheaves 14

15 Locking Assembly dimensions Transmissible torques Surface pressure Locking screws D N min at or axial forces ISO Rp 0,2 Shaft Hub d x D d x D L L 1 L 3 T F ax p W p N n Sc D G T A Gw [N/mm 2 ] T max mm inch inch ft-lbs lbs psi pcs. ft-lbs lbs inch ft-lbs 540 x x M 24 x x x M 24 x x x M 24 x x x M 24 x x x M 24 x x x M 24 x x x M 24 x x x M 24 x x x M 24 x x x M 24 x x x M 24 x x x M 24 x x x M 24 x x x M 24 x x x M 24 x x x M 24 x x x M 24 x x x M 24 x x x M 24 x x x M 24 x x x M 24 x x x M 24 x x x M 24 x x x M 24 x Ordering example: RfN 7012 Series d D RfN Explanations to tables: Page 9 More sizes on request Mounting of Locking Assembly The Locking Assemblies are supplied slightly oiled and ready-to-use. The values for T, F ax, p W and p N apply to Locking Assemblies in delivery condition. Surface finishes For shafts and hub bores R a 3,2 µm Tolerances We recommend the following mounting tolerances Shaft: k9-h9; Hub: N9-H9 Max. permissible: Shaft: k11-h11; Hub: N11-H11 To avoid excessive deformations of the relatively thick-walled thrust rings, the Locking Assembly should be located as symmetrically as possible between shaft and hub bore. If the shaft is smaller than nominal d, the bore should exceed nominal D to the same extent and vice versa. The concentricity quality is determined by the direct centering between shaft and hub. Arrangement of several Locking Assemblies RfN 7012 If several Locking Assemblies are to be installed the transmission values of the table can be added, when the Locking Assemblies are located within a distance of 4 L. Change of screw tightening torques The Locking Assemblies are equipped with 12.9 grade screws. A reduction of the screw tightening torque is possible. The lowest allowable screw tightening torque results from the multiplication of the T A -value by 0.5. There is an approximate linear relationship between T, T A, F ax, p W and p N. Auxiliary threads To facilitate removal, the front thrust rings have auxiliary threads. RfN

16 RINGFEDER Locking Assemblies RfN L N 2 L 3 ø DN Locking Assembly RfN Location Calculation of hubs see on page (Calculation possible for other hub forms in our calculation program) L L 1 L 3 d D Locking Assembly RfN Dimensions 16

17 Locking Assembly dimensions Transmissible torques Surface pressure Special locking screws D N min at or axial forces Rp 0,2 Shaft Hub d x D d x D L L 1 L 3 T F ax p W p N n Sc D G T A Gw [N/mm 2 ] T max mm inch inch ft-lbs lbs psi pcs. ft-lbs lbs inch ft-lbs 100 x x M 12 x x x M 12 x x x M 12 x x x M 12 x x x M 12 x x x M 12 x x x M 12 x x x M 14 x x x M 14 x x x M 14 x x x M 14 x x x M 16 x x x M 16 x x x M 16 x x x M 18 x x x M 18 x x x M 20 x x x M 20 x x x M 22 x x x M 22 x x x M 22 x x x M 22 x x x M 24 x x x M 24 x x x M 24 x x x M 24 x x x M 24 x x x M 24 x x x M 24 x x x M 24 x x x M 24 x x x M 24 x x x M 24 x x x M 24 x x x M 24 x x x M 24 x x x M 24 x x x M 24 x x x M 24 x x x M 24 x x x M 24 x Ordering example: RfN Series d D RfN Explanations to tables: Page 9 More sizes on request RfN

18 RINGFEDER Locking Assemblies RfN Characteristics Slimmest design, especially suitable for applications where space is limited. The not self-centering Locking Assembly RfN compensates small tolerance deviations and compensates small mounting errors. Large transmittable forces and moments several Locking Assemblies RfN can be placed one behind the other. The transmissible torque and axial forces are added - please take in this respect consulting with our technical experts. Bending moment and radial loads combined loads can be transmitted. (Please contact our technical department for assistance). Easy installation Locking Assemblies RfN can bridge large clearances without the loss of transmission values. Low risk to contamination during the tightening process the functional surfaces of the device and connection are pressed together generating a surface pressure that does not allow the ingress of contamination. Free from wear the Locking Assembly RfN works without moving parts on shaft and hub, through this, abrasive wear and backlash are avoided. Thus, RfN can be repeatedly clamped and released. Example applications: Chain wheels, levers, pulleys, slip-on gear mechanisms, belt drums, running wheels, cable sheaves 18

19 Mounting of Locking Assembly The Locking Assemblies are supplied slightly oiled and readyto-use. The values for T, F ax, p W and p N apply to Locking Assemblies in delivery condition. Surface finishes For shafts and hub bores R a 3,2 µm Tolerances We recommend the following mounting tolerances Shaft: k9-h9; Hub: N9-H9 Max. permissible: Shaft: k11-h11; Hub: N11-H11 To avoid excessive deformations of the relatively thickwalled thrust rings, the Locking Assembly should be located as symmetrically as possible between shaft and hub bore. If the shaft is smaller than nominal d, the bore should exceed nominal D to the same extent and vice versa. The concentricity quality is determined by the direct centering between shaft and hub. Arrangement of several Locking Assemblies RfN If several Locking Assemblies are to be installed the transmission values of the table can be added when the Locking Assemblies are located within a distance of 4 L. Change of screw tightening torques The Locking Assemblies are equipped with 12.9 grade screws. A reduction of the screw tightening torque is possible. The lowest allowable screw tightening torque results from the multiplication of the T A -value by 0.5. There is an approximate linear relationship between T, T A, F ax, p W and p N. Auxiliary threads To facilitate removal, the front thrust rings have auxiliary threads. RfN

20 RINGFEDER Locking Assemblies RfN IN L N 2 L 3 ø DN Characteristics Excellent concentricity and very easy to dismantle these Locking Assemblies provide particularly good concentricity between the clamped parts. The flange is reinforced at the critical point. This prevents a bending and lifting of the inner ring during installation and therefore a good dismantling is ensured. High rotation speed the Locking Assemblies remain true-toform during assembly and so they are suitable in applications with higher rotational speeds. High radial loads the material strength of the RfN 7013 Locking Assemblies makes them especially suitable for applications with high radial loads. Example applications: Locking Assembly RfN Location / Calculation of hubs see on Page Calculation possible for other hub forms in our calculation program d L L 1 Locking Assembly RfN Dimensions L3 D Crane running wheels, couplings, gear wheels, flywheels, fan wheels Locking Assembly RfN Gear wheels Calculation possible for other hub forms in our calculation program 20

21 Locking Assembly dimensions Transmissible torques Surface pressure Locking screws D N min at or axial forces ISO R p0,2 Shaft Hub d d x D L L 1 L 3 T F ax p W p N n Sc D G T A Gw [N/mm 2 ] inch inch inch ft-lbs lbs psi pcs. ft-lbs lbs inch x M 6 x /16 x M 6 x /4 x M 6 x /8 x M 6 x /16 x M 6 x /2 x M 6 x /8 x M 8 x /4 x M 8 x /8 x M 8 x /16 x M 8 x x M 8 x /8 x M 8 x /16 x M 8 x /4 x M 8 x /8 x M 8 x /16 x M 8 x /2 x M 8 x /16 x M 8 x /4 x M 10 x /8 x M 10 x /16 x M 10 x x M 10 x /8 x M 10 x /16 x M 10 x /2 x M 10 x /4 x M 10 x /16 x M 10 x x M 10 x Ordering example: RfN IN Series Size RfN IN 1 15/16 Explanations to tables: Page 9 More sizes on request Mounting of Locking Assembly The Locking Assemblies are supplied slightly oiled and readyto-use. The values for T, F ax, p W and p N apply to Locking Assemblies installed in the delivery condition. Surface finishes For shafts and hub bores R a 1,6 µm Tolerances We recommend the following mounting tolerances Shaft: h8; Hub: H8 Change of screw tightening torques A change of the T A -values given in the above table is inadmissible. RfN IN 21

22 RINGFEDER Locking Assemblies RfN L N 2 L 3 ø DN Characteristics Excellent concentricity and very easy to dismantle these Locking Assemblies provide particularly good concentricity between the clamped parts. The flange is reinforced at the critical point. This prevents a bending and lifting of the inner ring during installation and therefore a good dismantling is ensured. High rotation speed the Locking Assemblies remain true-toform during assembly and so they are suitable in applications with higher rotational speeds. High radial loads the material strength of the RfN 7013 Locking Assemblies makes them especially suitable for applications with high radial loads. Example applications: Locking Assembly RfN Location / Calculation of hubs see on Page Calculation possible for other hub forms in our calculation program d L L 1 Locking Assembly RfN Dimensions L3 D Crane running wheels, couplings, gear wheels, flywheels, fan wheels Locking Assembly RfN Gear wheels Calculation possible for other hub forms in our calculation program 22

23 Locking Assembly dimensions Transmissible torques Surface pressure Locking screws D N min at or axial forces ISO Rp 0,2 Shaft Hub d x D d x D L L 1 L 3 T F ax p W p N n Sc D G T A Gw [N/mm 2 ] T max mm inch inch ft-lbs lbs psi pcs. ft-lbs lbs inch ft-lbs 19 x x M 6 x x x M 6 x x x M 6 x x x M 6 x x x M 6 x x x M 6 x x x M 6 x x x M 6 x x x M 6 x x x M 6 x x x M 6 x x x M 8 x x x M 8 x x x M 8 x x x M 8 x x x M 8 x x x M 8 x x x M 8 x x x M 10 x x x M 10 x x x M 10 x x x M 10 x x x M 10 x x x M 10 x x x M 10 x x x M 10 x x x M 10 x x x M 12 x x x M 12 x x x M 12 x Ordering example: RfN Series d D RfN Explanations to tables: Page 9 More sizes on request Mounting of Locking Assembly The Locking Assemblies are supplied slightly oiled and readyto-use. The values for T, F ax, p W and p N apply to Locking Assemblies installed in the delivery condition. Surface finishes For shafts and hub bores R a 1,6 µm Tolerances We recommend the following mounting tolerances Shaft: h8; Hub: H8 Change of screw tightening torques A change of the T A -values given in the above table is inadmissible. RfN

24 RINGFEDER Locking Assemblies RfN IN L N 2 L 3 ø DN Characteristics Locking Assembly RfN Location / Calculation of hubs see on Page Calculation possible for other hub forms in our calculation program Excellent concentricity and very easy to dismantle these Locking Assemblies provide particularly good concentricity between the clamped parts. The flange is reinforced at the critical point, preventing bending or lifting of the inner ring during assembly and thereby ensuring easy dismantling. L L 1 L 4 L 3 High rotation speed the dimensional accuracy of the RfN 7013 Locking Assemblies allows their use in applications with higher rotational speeds. High radial loads the material strength of the RfN 7013 Locking Assemblies makes them especially suitable for applications with high radial loads. DB1 d D Axial hub positioning the increased outer diameter of the flange prevents the axial movement of the hub during assembly and improves the run-out ability of the Locking Assembly. Locking Assembly RfN Dimensions High torque the increased number of clamping screws ensures the same transmission values as the RfN Locking Assembly RfN Bevel gear wheel 24

25 Locking Assembly dimensions Transmissible torques Surface pressure Locking screws min. D N or axial forces ISO Rp 0,2 [N/mm 2 ] Shaft Hub d d x D D B1 L L 1 L 3 L 4 T F ax p W p N n Sc D G SW T A Gw inch inch inch inch ft-lbs lbs psi pcs. mm ft-lbs inch lbs x M 6 x /2 x M 6 x /4 x M 6 x /16 x M 8 x /16 x M 6 x /4 x M 8 x /8 x M 6 x /9 x M 6 x /8 x M 8 x /8 x M 8 x x M 8 x /2 x M 8 x /4 x M 8 x /8 x M 8 x /16 x M 10 x /16 x M 8 x /4 x M 10 x /8 x M 8 x /7 x M 8 x /16 x M 8 x /8 x M 10 x x M 10 x /2 x M 10 x /16 x M 10 x /4 x M 10 x /8 x M 10 x /9 x M 10 x x M 10 x Ordering example: RfN IN Series Size RfN IN 1 7/8 Explanations to tables: Page 9 More sizes on request Mounting of Locking Assembly The Locking Assemblies are supplied slightly oiled and readyto-use. The values for T, F ax, p W and p N apply to Locking Assemblies installed in the delivery condition. Surface finishes For shafts and hub bores R a 1,6 µm Tolerances We recommend the following mounting tolerances Shaft: h8; Hub: H8 Arrangement of several Locking Assemblies RfN Arrangement only possible from 2 sides. If several Locking Assemblies are used to increase the transmission values, the clamping systematization has to be considered. Change of screw tightening torques A change of the T A -values given in the above table is not admissible. RfN IN 25

26 RINGFEDER Locking Assemblies RfN L N 2 L 3 ø DN Characteristics Locking Assembly RfN Location / Calculation of hubs see on Page Calculation possible for other hub forms in our calculation program Excellent concentricity and very easy to dismantle these Locking Assemblies provide particularly good concentricity between the clamped parts. The flange is reinforced at the critical point, preventing bending or lifting of the inner ring during assembly and thereby ensuring easy dismantling. L L 1 L 4 L 3 High rotation speed the dimensional accuracy of the RfN 7013 Locking Assemblies allows their use in applications with higher rotational speeds. High radial loads the material strength of the RfN 7013 Locking Assemblies makes them especially suitable for applications with high radial loads. DB1 d D Axial hub positioning the increased outer diameter of the flange prevents the axial movement of the hub during assembly and improves the run-out ability of the Locking Assembly. Locking Assembly RfN Dimensions High torque the increased number of clamping screws ensures the same transmission values as the RfN Locking Assembly RfN Bevel gear wheel 26

27 Locking Assembly dimensions Transmissible torques Surface pressure Locking screws D N min at or axial forces ISO R p0,2 Shaft Hub d x D d x D D B1 L L 1 L 3 L 4 T F ax p W p N n Sc D G T A Gw [N/mm 2 ] T max mm inch inch inch ft-lbs lbs psi pcs. ft-lbs lbs inch ft-lbs 19 x x M 6 x x x M 6 x x x M 6 x x x M 6 x x x M 6 x x x M 6 x x x M 6 x x x M 6 x x x M 6 x x x M 6 x x x M 6 x x x M 8 x x x M 8 x x x M 8 x x x M 8 x x x M 8 x x x M 8 x x x M 8 x x x M 10 x x x M 10 x x x M 10 x x x M 10 x x x M 10 x x x M 10 x x x M 10 x x x M 10 x x x M 10 x x x M 12 x x x M 12 x x x M 12 x Ordering example: RfN Series d D RfN Explanations to tables: Page 9 More sizes on request Mounting of Locking Assembly The Locking Assemblies are supplied slightly oiled and readyto-use. The values for T, F ax, p W and p N apply to Locking Assemblies installed in the delivery condition. Surface finishes For shafts and hub bores R a 1,6 µm Tolerances We recommend the following mounting tolerances Shaft: h8; Hub: H8 Arrangement of several Locking Assemblies RfN Arrangement only possible from 2 sides. If several Locking Assemblies are used to increase the transmission values, the clamping systematization has to be considered. Change of screw tightening torques A change of the T A -values given in the above table is not admissible. RfN

28 RINGFEDER Locking Assemblies RfN 7014 L N L (L - L 1 ) ø DN Locking Assembly RfN 7014 Location / Calculation of hubs see on Page Calculation possible for other hub forms in our calculation program Characteristics Large transmittable peripheral forces due to the long, flat cones it is possible to transmit maximum torques and axial forces with one Locking Assembly RfN L L 1 L 3 Maximum reliability due to the flat cones and the relatively wide construction (large guide lengths) the Locking Assemblies RfN 7014 centre themselves. During installation the Locking Assembly, shaft and hub remain in position to one another. The shaft and hub are loaded by pressure, providing additional safety compared to 3-part versions. d D Example applications: Locking Assembly RfN 7014 Dimensions Heavy pulleys, construction of heavy machinery, couplings, cable sheaves Locking Assembly RfN 7014 Gear wheel fastening 28

29 Locking Assembly dimensions Transmissible torques Surface pressure Locking screws D N min at or axial forces ISO Rp 0,2 Shaft Hub d x D d x D L L 1 L 3 T F ax p W p N n Sc D G T A Gw [N/mm 2 ] T max mm inch inch ft-lbs lbs psi pcs. ft-lbs lbs inch ft-lbs 70 x x M 12 x x x M 12 x x x M 12 x x x M 14 x x x M 14 x x x M 14 x x x M 14 x x x M 14 x x x M 14 x x x M 16 x x x M 16 x x x M 16 x x x M 16 x x x M 16 x x x M 18 x x x M 18 x x x M 18 x x x M 20 x x x M 20 x Ordering example: RfN 7014 Series d D RfN Explanations to tables: Page 9 More sizes on request Mounting of Locking Assembly The values for T, F ax, p W and p N apply to Locking Assemblies installed in oiled condition. Surface finishes For shafts and hub bores R a 3,2 µm Tolerances We recommend the following mounting tolerances Shaft: k9-h9; Hub: N9-H9 Pay attention: For the removal of the Locking Assembly a step in the hub or shaft is required (see location drawing page 22). Change of screw tightening torques A reduction of the contact pressures and the transmission values by reducing the tightening torque of the screws is possible. The admissible lower limit results from the multiplication of the T A -values of the above table by 0.8. There is an approximate linear relationship between T, T A, F ax, p W and p N. Arrangement of several Locking Assemblies RfN 7014 Max. two RfN 7014 Locking Assemblies can be used in series, the trans missible torques and axial forces are added. RfN

30 RINGFEDER Locking Assemblies RfN L N L + 2 (L - L 1 ) ø DN Characteristics Precision Locking Assembly for the transmission of maximum torques and axial forces with special demands on the concentricity of the parts of the clamped, as well as for applications subjected to bending moments. Large transmittable peripheral forces due to the long, flat cones it is possible to transmit maximum torques and axial forces with one RfN Locking Assembly. During installation the Locking Assembly, shaft and hub remain in position to one another. Compared to 3-part versions, thus an additional safety is provided. Shaft and hub are only compression-loaded. Locking Assembly RfN Location / Calculation of hubs see on Page Calculation possible for other hub forms in our calculation program L L 1 L 3 Bending moment and radial loads combined loads can be transmitted (Please contact our technical department for assistance). d D Excellent centering ability with a relatively wide design and the precentering web the RfN Locking Assembly has excellent centering ability. Example applications: Locking Assembly RfN 7015 Dimensions Belt drums, crusher rotors, press drives Drive unit for high-speed elevator with Locking Assembly 30

31 Locking Assembly dimensions Transmissible torques Surface pressure Locking screws D N min at or axial forces ISO Rp 0,2 Shaft Hub d x D d x D L L 1 L 3 T F ax p W p N n Sc D G T A Gw [N/mm 2 ] T max mm inch inch ft-lbs lbs psi pcs. ft-lbs lbs inch ft-lbs 100 x x M 12 x x x M 12 x x x M 12 x x x M 12 x x x M 12 x x x M 12 x x x M 12 x x x M 14 x x x M 14 x x x M 14 x x x M 14 x x x M 16 x x x M 16 x x x M 16 x x x M 18 x x x M 18 x x x M 20 x x x M 20 x x x M 22 x x x M 22 x x x M 22 x x x M 22 x x x M 24 x x x M 24 x x x M 24 x x x M 24 x x x M 27 x x x M 27 x x x M 27 x x x M 27 x x x M 27 x x x M 27 x x x M 27 x x x M 27 x x x M 27 x x x M 27 x x x M 27 x x x M 27 x x x M 27 x x x M 27 x x x M 27 x Ordering example: RfN Series d D RfN Explanations to tables: Page 9 More sizes on request Mounting of Locking Assembly The values for T, F ax, p W and p N apply to Locking Assemblies installed in oiled condition. Surface finishes For shafts and hub bores R a 3,2 µm Tolerances We recommend the following mounting tolerances Shaft: h8 Hub: H8 Arrangement of several Locking Assemblies RfN Max. two RfN 7015 Locking Assemblies can be used in series, the trans missible torques and axial forces are added. Change of screw tightening torques A reduction of the contact pressures and the transmission values by reducing the tightening torque of the screws is possible. The admissible lower limit results from the multiplication of the T A -values of the above table by 0.5. There is an approximate linear relationship between T, T A, F ax, p W and p N. RfN

32 RINGFEDER Locking Assemblies RfN L N L + 2 (L - L 1 ) ø DN Characteristics Locking Assembly for transmission of torques, axial forces and high bending moments at reduced contact pressures, with special requirements to the true running of the clamped pieces. Special features With the long and flat angle of the cones, the required loads can be transferred with one Locking Assembly RfN During mounting Locking Assembly, shaft and hub remain to each other in position. Compared to three-part construction types, thus an additional safety is provided. Shaft and hub are only compression loaded. Locking Assembly RfN Location / Calculation of hubs see on Page Calculation possible for other hub forms in our calculation program L L 1 L 3 Bending moment and radial loads combined loads can be transmitted (Please contact our technical department for assistance). d D Excellent centering ability with a relatively wide design and the precentering web the RfN Locking Assembly has excellent centering ability. Locking Assembly RfN Dimensions Example applications: Belt drums, gear wheels Jaw crusher 32

33 Locking Assembly dimensions Transmissible torques Surface pressure Locking screws D N min at or axial forces ISO Rp 0,2 Shaft Hub d x D d x D L L 1 L 3 T F ax p W p N n Sc D G T A Gw [N/mm 2 ] T max mm inch inch ft-lbs lbs psi pcs. ft-lbs lbs inch ft-lbs 100 x x M 10 x x x M 10 x x x M 10 x x x M 10 x x x M 10 x x x M 10 x x x M 10 x x x M 12 x x x M 12 x x x M 12 x x x M 12 x x x M 12 x x x M 12 x x x M 12 x x x M 14 x x x M 14 x x x M 16 x x x M 16 x x x M 18 x x x M 18 x x x M 18 x x x M 18 x x x M 20 x x x M 20 x x x M 20 x x x M 20 x x x M 20 x x x M 20 x x x M 20 x x x M 20 x x x M 20 x x x M 20 x x x M 20 x x x M 20 x x x M 20 x x x M 20 x x x M 20 x x x M 20 x x x M 20 x x x M 20 x x x M 20 x Ordering example: RfN Series d D RfN Explanations to tables: Page 9 More sizes on request Mounting of Locking Assembly The values for T, F ax, p W and p N apply to Locking Assemblies installed in oiled condition. Surface finishes For shafts and hub bores R a 3,2 µm Tolerances We recommend the following mounting tolerances Shaft: h8; Hub: H8 Arrangement of several Locking Assemblies RfN Max. two RfN Locking Assemblies can be used in series, the trans missible torques and axial forces are added. Change of screw tightening torques A reduction of the contact pressures and the transmission values by reducing the tightening torque of the screws is possible. The admissible lower limit results from the multiplication of the T A -values of the above table by 0.5. There is an approximate linear relationship between T, T A, F ax, p W and p N. RfN

34 RINGFEDER Locking Assemblies RfN 7515 L N L + 2 (L - L 1 ) ø DN Characteristics Precision Locking Assembly for transmission of torques, axial forces and special optimised for the transmission of bending moments, with special requirements to the true running of the clamped pieces. Locking Assembly RfN 7515 Location / Calculation of hubs see on Page Calculation possible for other hub forms in our calculation program L L 1 L 3 Special features Through the long and flat cones one Locking Assembly RfN 7515 can transmit torques and axial forces and bending loads. During mounting occurs a slight axial movement from Locking Assembly and hub. Bending moment and radial loads combined loads can be transmitted (Please contact our technical department for assistance). d D Excellent centering ability with a relatively wide design. Locking Assembly RfN 7515 Dimensions Example applications: Belt drums, gear wheels Ready-for-shipping conveyor pulleys with Locking Assemblies 34

35 Locking Assembly dimensions Transmissible torques Surface pressure Locking screws D N min at or axial forces ISO Rp 0,2 Shaft Hub d x D d x D L L 1 L 3 T F ax p W p N n Sc D G T A Gw [N/mm 2 ] mm inch inch ft-lbs lbs psi pcs. ft-lbs lbs inch 60 x x M 8 x x x M 10 x x x M 10 x x x M 10 x x x M 12 x x x M 12 x x x M 12 x x x M 12 x x x M 12 x x x M 12 x x x M 12 x x x M 14 x x x M 14 x x x M 14 x x x M 14 x x x M 16 x x x M 16 x x x M 16 x x x M 20 x x x M 20 x x x M 20 x x x M 20 x x x M 22 x x x M 22 x x x M 22 x x x M 22 x x x M 22 x x x M 22 x x x M 22 x x x M 22 x x x M 22 x x x M 22 x x x M 22 x x x M 22 x x x M 22 x x x M 22 x x x M 22 x Ordering example: RfN 7515 Series d D RfN Explanations to tables: Page 9 More sizes on request Mounting of Locking Assembly The values for T, F ax, p W and p N apply to Locking Assemblies installed in oiled condition. Surface finishes For shafts and hub bores R a 1,6 µm Change of screw tightening torques A reduction of the contact pressures and the transmission values by reducing the tightening torque of the screws is possible. The admissible lower limit results from the multiplication of the T A -values of the above table by 0.5. There is an approximate linear relationship between T, T A, F ax, p W and p N. Tolerances We recommend the following mounting tolerances Shaft: h8; Hub: H8 RfN

36 RINGFEDER Locking Assemblies with central lock nut Characteristics Easy to connect and to release no seizures along the shaft Perfect for engaged connections Excellent concentricity and radial run Single locking nut for quick installation and settings Minimal external diameter for assembling thin-walled components Suitable for grooveless and keyless shafts Lightweight, low mass moment of inertia 36

37 RfN 7070 RfN 7075 RfN 7085 RfN

38 RINGFEDER Locking Assemblies RfN 7070 d D Locking Assembly RfN 7070 Location A A Locking Assembly RfN 7070 Dimensions L L 1 L 3 SW SW Locking Assembly RfN 7070 Dimensions 38

39 Locking Assembly dimensions Transmissible torques Surface pressure or axial forces Hub d x D d D L L 1 L 3 SW T Fax p N T A Gw mm inch inch inch inch mm ft-lbs lbs psi ft-lbs lbs 5 x x x x x x x x x x x x x x x x x x x x x x Ordering example: RfN 7070 Series d D RfN Surface finishes For shafts and hub bores Ra 1,6 µm Tolerances We recommend the following mounting tolerances Shaft: h8; Hub: H8 Explanations to tables Basic dimensions when screws are not tightened d D L = Inner diameter = Outer diameter = Overall length L 1 = Installation length without clamping nut L 3 = Width of inner ring SW = Wrench size T = Transmissible torque at given T A F ax = Transmissible axial force p N = Surface pressure on hub at given T A T A = Max. tightened torque of the clamping screws Gw = Weight RfN

40 RINGFEDER Locking Assemblies RfN 7075 d D Locking Assembly RfN 7075 Location e SW Locking Assembly RfN 7075 Dimensions L L 8 L 1 SW Locking Assembly RfN 7075 Dimensions 40

41 Locking Assembly dimensions Transmissible torques Surface pressure or axial forces Hub d x D d D L L 1 L 8 SW e T pn T A Gw mm inch inch inch inch mm inch ft-lbs psi ft-lbs lbs 17 x x x x x x x x x x x x x x x x x x x x x x Ordering example: RfN 7075 Series d D RfN Surface finishes For shafts and hub bores Ra 1,6 µm Tolerances We recommend the following mounting tolerances Shaft: h8; Hub: H8 Explanations to tables Basic dimensions when screws are not tightened d D L = Inner diameter = Outer diameter = Overall length L 1 = Installation lenght without clamping nut L 8 = Overhang length SW = Wrench size e T = Width across corners = Transmissible torque at given T A p N = Surface pressure on hub at given TA T A = Max. tightened torque of the clamping screws Gw = Weight RfN

42 RINGFEDER Locking Assemblies RfN 7085 d D Self- centering Locking Assembly RfN 7085 Location A Self- centering Locking Assembly RfN 7085 Dimensions l 3 L Self- centering Locking Assembly RfN 7085 Dimensions 42

43 Locking Assembly dimensions Wrench size Transmissible torques Surface pressure Locking nut or axial forces Shaft Hub d x D d x D L l 3 SW T F ax p W p N T A Gw mm mm inch inch inch mm ft-lbs lbs psi ft-lbs lbs 5 x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x Ordering example: RfN 7085 Series d D RfN Surface finishes For shafts and hub bores Ra 1,6 µm Tolerances We recommend the following mounting tolerances Shaft: h8; Hub: H8 Explanations to tables Basic dimensions when screws are not tightened d = Inner diameter D = Outer diameter L = Overall length l 3 = Clamping length SW = Wrench size T = Transmissible torque at given T A F ax = Transmissible axial force p W = Surface pressure on shaft at given T A p N = Surface pressure on hub at given T A T A = Max. tightened torque of the locking nut Gw = Weight RfN

44 RINGFEDER Locking Assemblies RfN 7090 stainless steel d D Self- centering Locking Assembly RfN 7090 Location STAINLESS STEEL A Self- centering Locking Assembly RfN 7090 Dimensions L L 1 Self- centering Locking Assembly RfN 7090 Dimensions 44

45 Locking Assembly dimensions Wrench size Transmissible torques or axial forces Locking nut d x D d x D L L 1 SW T T A Gw mm inch inch inch mm ft-lbs ft-lbs lbs 4 x x x x x x ,35 x x x x x x x x ,52 x x x x x x x x x x x x ,88 x x x x x x x x x x Ordering example: RfN 7090 Series d D RfN Surface finishes For shafts and hub bores Ra 1,6 µm Tolerances We recommend the following mounting tolerances Shaft: h8; Hub: H8 Explanations to tables Basic dimensions when screws are not tightened d D L = Inner diameter = Outer diameter = Overall length L 1 = Installation length without clamping nut SW = Wrench size T = Transmissible torque at given T A T A = Max. tightened torque of the locking nut Gw = Weight RfN

46 RINGFEDER Locking Assemblies for Bending Moments 46

47 RfN 7012 RfN RfN RfN RfN

48 RINGFEDER Locking Assemblies for Bending Moments Characteristics One of the most demanding challenges of our promise of performance is the conveyor pulley application field. The extreme loads which such components are subject to, especially the high bending moment, coupled with the simultaneous indispensable reliability and longest possible service life, require the highest of engineering know-how. Our international development team, which has already set benchmarks in quality Locking Assemblies for the RfN 7012, RfN , RfN and RfN products, is here setting a further milestone. The new development of the RfN 7515 Locking Assemblies has set a new benchmark in this segment with its quality, performance and price range. Quality means: high-quality materials and material services and the most precise workmanship, guarantee sustainable product usage. Performance means: reliability and long service life means: minimization of machine downtime and maximization of service life. Price means: not just the newest, but also the most economical RINGFEDER Locking Assemblies product at the high level of performance you are used to. 48

49 Explanations to tables Basic dimensions when screws are not tightened d D L L 1 L 3 n Sc D G T A red. T = Inner diameter = Outer diameter = Overall length = Overall length without screws = Width of inner ring = Quantity of screws = Thread = Reduced tightened torque of the screws under bending load = Transmissible torque at given T A p W = Surface pressure on shaft at given T A p N = Surface pressure on hub at given T A M b max. = Max. bending moment under the specified T A T res. at M b max. = Remaining transmissible torque at indicated M b max. and specified torque p Wmax. at M b max. = Max. surface pressure on shaft at max. bending moment p Nmax. at M b max. = Max. surface pressure on hub at max. bending moment p Wmin. at M b max. = Min. surface pressure on shaft at max. bending moment p Nmin. at M b max. = Min. surface pressure on hub at max. bending moment F ax at M b max. = Transmissible axial force at max. bending moment Gw = Weight 49

50 RINGFEDER Locking Assemblies for Bending Moments RfN 7012 L L 1 L 3 d D Locking Assembly RfN 7012 Dimensions Typical belt drum application The bending moment acting on the hub/shaft connection is the main load to evaluate in a belt drum or similar application. Excessive bending moments can cause overstress in the webs between the screw holes in the Locking Assembly. In the case of additional loads (bending moments/radial loads) screw tightening torques may have to be reduced. To limit the influence of the bending load on the locking assembly connection we use the two following criteria during the belt drum design process: a) Shaft deflection from the bending moments may only have a maximum deflection fm < 1/2000 L (bearing centre distance). b) The permissible bending load values as shown in the following tables. 50

51 RINGFEDER Locking Assemblies for Bending Moments Locking Assembly dimensions Locking screws ISO T res. p Wmax p Nmax p Wmin p Nmin F ax at at at at d x D d x D L L 1 L 3 n Sc D G T Ared. T p W p N M b max. M b max. M b max. M b max. M b max. Gw mm inch inch pcs. ft-lbs ft-lbs psi ft-lbs psi psi psi lbs lbs 100 x x M12 x x x M12 x x x M12 x x x M12 x x x M12 x x x M12 x x x M12 x x x M14 x x x M14 x x x M14 x x x M14 x x x M16 x x x M16 x x x M16 x x x M18 x x x M18 x x x M20 x x x M20 x x x M22 x x x M22 x x x M22 x x x M22 x x x M24 x x x M24 x x x M24 x x x M24 x x x M24 x x x M24 x x x M24 x x x M24 x x x M24 x x x M24 x x x M24 x x x M24 x x x M24 x x x M24 x x x M24 x x x M24 x x x M24 x x x M24 x x x M24 x Surface finishes For shafts and hub bores R a 3,2 µm Tolerances We recommend the following mounting tolerances Shaft h9 Hub H9 Explanations to tables: Page 49 More sizes on request Remark! The values of the shaft- and hub pressures have been calculated with the screw tightening shown in the tables. Reduction of the screw tightening torque results in different calculation values! The specified pressures at M bmax. are sometimes very low. An operation near these limit values may therefore lead to increased fretting corrosion! More options with reduced bending moments (Mb 20% - Mb 80%) can be found on our website. RfN

52 RINGFEDER Locking Assemblies for Bending Moments RfN 7012 Special surfaces for RINGFEDER premium products All premium products are smooth-ground as standard using a process specially developed for us. Account to this special quality feature, a consistent reproducible coefficient of friction is achieved for all Locking Assembly contact surfaces. L L 1 L 3 d D Locking Assembly RfN 7012 Dimensions Surface roughness measurement 52

53 RINGFEDER Locking Assemblies for Bending Moments Locking Assembly dimensions Locking screws ISO T res. p Wmax p Nmax p Wmin p Nmin F ax at at at at d x D d x D L L 1 L 3 n Sc D G T Ared. T p W p N M b max. M b max. M b max. M b max. M b max. Gw mm inch inch pcs. ft-lbs ft-lbs psi ft-lbs psi psi psi lbs lbs 820 x x M24 x x x M24 x x x M24 x x x M24 x x x M24 x x x M24 x x x M24 x x x M24 x x x M24 x x x M24 x Ordering example: RfN 7012 Series d D RfN Explanations to tables: Page 49 More sizes on request Surface finishes For shafts and hub bores R a 3,2 µm Tolerances We recommend the following mounting tolerances Shaft: h9; Hub: H9 Remark! The values of the shaft- and hub pressures have been calculated with the screw tightening shown in the tables. Reduction of the screw tightening torque results in different calculation values! The specified pressures at M bmax. are sometimes very low. An operation near these limit values may therefore lead to increased fretting corrosion! More options with reduced bending moments (Mb 20% - Mb 80%) can be found on our website. RfN

54 RINGFEDER Locking Assemblies for Bending Moments RfN L L 1 L 3 d D Locking Assembly RfN Dimensions NEW: The new Locking Assembly series RINGFEDER RfN is specially designed to fulfil the requirements of constantly increasing bending moments for conveyor pulleys. The challenge was to develop a product with the same dimensions as the standard RINGFEDER RfN 7012 to fit into existing end discs yield point of end disc has to be checked so that also material handling equipment at hand can be upgraded. At the same time the Locking Assembly should carry a multiple of the bending moments of the standard RINGFEDER RfN To comply with these requirements, we have collected the experiences of our customers and our knowledges of supplying to the market of heavy industry for more than 90 years. The result is the brand new RINGFEDER RfN , according to the table on page 51. A special bolt for type RfN has been developed by RINGFEDER for the increased requirements occurring when subject to loading by bending moments. These special bolts guarantee loadings above strength class 12.9 at simultaneous higher expansion with regard to tensile strength and yield strength. These bolts were manufactured specially for RINGFEDER with qualified steel analysis. Every bolt is labelled with RPT-B and the batch number. This allows every bolt to be traced back to manufacture. The benefit of this bolt is the considerably increased fracture resistance under additional bending stress. 54

55 RINGFEDER Locking Assemblies for Bending Moments Locking Assembly dimensions Special locking Ordering example: RfN Series d D RfN screws T res. p Wmax p Nmax p Wmin p Nmin F ax d x D d x D L L 1 L 3 n Sc D G T Ared. T p W p N M b max. M b max. mm inch inch pcs. ft-lbs ft-lbs psi ft-lbs psi psi psi lbs lbs 100 x x M12 x x x M12 x x x M12 x x x M12 x x x M12 x x x M12 x x x M12 x x x M14 x x x M14 x x x M14 x x x M14 x x x M16 x x x M16 x x x M16 x x x M18 x x x M18 x x x M20 x x x M20 x x x M22 x x x M22 x x x M22 x x x M22 x x x M24 x x x M24 x x x M24 x x x M24 x x x M24 x x x M24 x x x M24 x x x M24 x x x M24 x x x M24 x x x M24 x x x M24 x x x M24 x x x M24 x x x M24 x x x M24 x x x M24 x x x M24 x x x M24 x Surface finishes For shafts and hub bores R a 3,2 µm Tolerances We recommend the following mounting tolerances Shaft h9 Hub H9 Explanations to tables: Page 49 More sizes on request Remark! The values of the shaft- and hub pressures have been calculated with the screw tightening shown in the tables. Reduction of the screw tightening torque results in different calculation values! The specified pressures at M bmax. are sometimes very low. An operation near these limit values may therefore lead to increased fretting corrosion! More options with reduced bending moments (Mb 20% - Mb 80%) can be found on our website. at at M b max. at M b max. at M bmax. Gw RfN

56 RINGFEDER Locking Assemblies for Bending Moments RfN L N L (L - L 1 ) L L 1 L 3 d D ø DN Locking Assembly RfN Location (Calculation possible for other hub forms in our calculation program) Locking Assembly RfN Dimensions Explanations to tables RfN 7012, RfN , RfN , RfN and RfN 7515 A bending moment, created by radial forces, results in an additional load for the Locking Assembly, shaft and hub. This load creates an additional pressure, works in rotation and has to be superpositioned with the pressure resulting from the Locking Assembly. For a viable connection, a minimum surface pressure at the contact areas between Locking Assembly, shaft and hub must be maintained, as soon as shaft and hub have to take up the maximal pressures. Additionally, the listed torque values (T) have been reduced due to the additional bending moments. To achieve lower stresses for the Locking Assemblies RfN 7012, RfN and RfN , the screw tightening torques (T A ) have also been reduced. 56

57 RINGFEDER Locking Assemblies for Bending Moments Locking Assembly dimensions Special locking screws T res. p Wmax p Nmax p Wmin p Nmin Fax at at at at d x D d x D L L 1 L 3 n Sc D G T Ared. T pw p N M b max. M b max. M b max. M b max. M bmax. Gw mm inch inch pcs. ft-lbs ft-lbs psi ft-lbs psi psi psi lbs lbs 100 x x M12 x x x M12 x x x M12 x x x M12 x x x M12 x x x M12 x x x M12 x x x M14 x x x M14 x x x M14 x x x M14 x x x M16 x x x M16 x x x M16 x x x M18 x x x M18 x x x M20 x x x M20 x x x M22 x x x M22 x x x M22 x x x M22 x x x M24 x x x M24 x x x M24 x x x M24 x x x M27 x x x M27 x x x M27 x x x M27 x x x M27 x x x M27 x x x M27 x x x M27 x x x M27 x x x M27 x x x M27 x x x M27 x x x M27 x x x M27 x x x M27 x Ordering example: RfN Series d D RfN Surface finishes For shafts and hub bores R a 3,2 µm Tolerances We recommend the following mounting tolerances Shaft h9 Hub H9 Explanations to tables: Page 49 More sizes on request Remark! The values of the shaft- and hub pressures have been calculated with the screw tightening shown in the tables. Reduction of the screw tightening torque results in different calculation values! The specified pressures at M bmax. are sometimes very low. An operation near these limit values may therefore lead to increased fretting corrosion! More options with reduced bending moments (Mb 20% - Mb 80%) can be found on our website. RfN

58 RINGFEDER Locking Assemblies for Bending Moments RfN L N L (L - L 1 ) Characteristics Version of the Locking Assembly RfN with lower surface pressure for reduction of the stresses at soft end discs. L L 1 L 3 d D ø DN Locking Assembly RfN Location (Calculation possible for other hub forms in our calculation program) Locking Assembly RfN Dimensions Conveyor pulley with locking assemblies and a shrink disc on the drive side 58

59 RINGFEDER Locking Assemblies for Bending Moments Locking Assembly dimensions Locking screws ISO T res. p Wmax p Nmax p Wmin p Nmin Fax at at at at d x D d x D L L 1 L 3 n Sc D G TA T p W p N M b max. M b max. M b max. M b max. M b max. mm inch inch pcs. ft-lbs psi ft-lbs psi psi psi lbs 100 x x M10 x x x M10 x x x M10 x x x M10 x x x M10 x x x M10 x x x M10 x x x M12 x x x M12 x x x M12 x x x M12 x x x M12 x x x M12 x x x M12 x x x M14 x x x M14 x x x M16 x x x M16 x x x M18 x x x M18 x x x M18 x x x M18 x x x M20 x x x M20 x x x M20 x x x M20 x x x M20 x x x M20 x x x M20 x x x M20 x x x M20 x x x M20 x x x M20 x x x M20 x x x M20 x x x M20 x x x M20 x x x M20 x x x M20 x x x M20 x x x M20 x Ordering example: RfN Series d D RfN Surface finishes For shafts and hub bores R a 3,2 µm Tolerances We recommend the following mounting tolerances Shaft h9 Hub H9 Explanations to tables: Page 49 More sizes on request Remark! The values of the shaft- and hub pressures have been calculated with the screw tightening shown in the tables. Reduction of the screw tightening torque results in different calculation values! The specified pressures at M bmax. are sometimes very low. An operation near these limit values may therefore lead to increased fretting corrosion! More options with reduced bending moments (Mb 20% - Mb 80%) can be found on our website. RfN

60 RINGFEDER Locking Assemblies for Bending Moments RfN 7515 LN L1 Characteristics Especially for the bending moment transmission designed 3 part Locking Assembly with reduced stresses in the Locking Assembly itself. L L 1 L 3 d D ø DN Locking Assembly RfN 7515 Location Calculation of hubs see on Page (Calculation possible for other hub forms in our calculation program) Locking Assembly RfN 7515 Dimensions Ready-for-shipping conveyor pulleys with locking assemblies 60

61 RINGFEDER Locking Assemblies for Bending Moments Locking Assembly dimensions Locking screws ISO T res. p Wmax p Nmax p Wmin p Nmin Fax at at at at d x D d x D L L 1 L 3 n Sc D G T A T pw p N M b max.m b max. M b max. M b max. M b max. Gw mm inch inch pcs. ft-lbs ft-lbs psi ft-lbs psi psi psi lbs lbs 60 x x M8 x x x M10 x x x M10 x x x M10 x x x M12 x x x M12 x x x M12 x x x M12 x x x M12 x x x M12 x x x M12 x x x M14 x x x M14 x x x M14 x x x M14 x x x M16 x x x M16 x x x M16 x x x M20 x x x M20 x x x M20 x x x M20 x x x M22 x x x M22 x x x M22 x x x M22 x x x M22 x x x M22 x x x M22 x x x M22 x x x M22 x x x M22 x x x M22 x x x M22 x x x M22 x x x M22 x x x M22 x Ordering example: RfN 7515 Series d D RfN Explanations to tables: Page 49 More sizes on request Surface finishes For shaft bores R a 1,6 µm For hub bores R a 3,2 µm Tolerances We recommend the following mounting tolerances Shaft h8 Hub H8 Remark! The values of the shaft- and hub pressures have been calculated with the screw tightening shown in the tables. Reduction of the screw tightening torque results in different calculation values! The specified pressures at M bmax. are sometimes very low. An operation near these limit values may therefore lead to increased fretting corrosion! More options with reduced bending moments (Mb 20% - Mb 80%) can be found on our website. RfN

62 RINGFEDER Locking Elements 62

63 RfN 8006 solid RfN 8006 slit 63

64 RINGFEDER Locking Elements Characteristics Customized application by varying the number of Locking Elements, size and quantity of clamping screws, the connection can be adapted to fit most applications concerning surface pressures, materials, hub/shaft dimensions and available mounting space. Transmission of high loads to increase the transmissible torque and axial forces up to 4 Locking Elements can be used in series (see page 68). Maximum reliability no matter whether the connection is subjected to static, pulsating, dynamic or intermittent loads. Simple manufacture shaft and hub are designed without keyway. Apart from this, relatively large tolerances are admissible. Easy adjustability Locking Elements work without positive connection. So they can be adjusted at any place to any position by following the simple installation and removal instructions. Backlash-free the locking element connection is a mechanical shrink fit and will not wear or loosen in service provided that the maximum transmissible values for the connection are not exceeded. High fatigue strength under alternating torsional stresses as neither the shaft nor the hub have grooves the notch effect is minimized and a higher polar section modulus is given, enabling the use of smaller diameters. Simple installation in comparison to cross-press fits temperature treatments and fitting are eliminated. Screws have to be tightened with standard tools. Easy removal Locking Elements are self releasing no additional measures or auxiliary equipment is required. Wear and maintenance-free unlimited lifetime if designed and used correctly. 64

65 Explanations to tables Basic dimensions when screws are not tightened d D L L 3 = Inner diameter = Outer diameter = Overall length = Width of inner ring A t = Bearing surface = π d L 3 T 100 = Transmissible torque based on p=14500 psi F ax100 = Transmissible axial force based on psi X (n) = Min. distance to thrust flange for (n) Locking Element(s). Any reduction of this value could cause that the required transmission value is not achieved. F 0 = Clamping force for gap filling to establish manufacturing tolerances - not for slit version F A = Needed clamping force to get a shaft pressure of psi d S1 D S1 = Diameter spacer sleeve inside = Diameter spacer sleeve outside T max = Max. transmissible torque Gw = Weight 65

66 RINGFEDER Locking Elements RfN 8006 X solid L L 3 d D DS1 ds1 d D RINGFEDER Locking Element RfN 8006 Location RINGFEDER Locking Elements RfN 8006 Dimensions slit V-belt pulley 66

67 * Generally slit. At Locking Elements in slit version F O is eliminated in the calculation. Locking Element dimensions Clamping force Transmissible torques Locking element Diameter spacer or axial forces sleeve inside outside d x D d D L L 3 A t F 0 F A T 100 F ax100 x Gw d S1 D S1 T max inch mm mm inch inch 2 lbs ft-lbs lbs inch lbs inch ft-lbs * x * * x * * x * x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x Explanations to tables: Page 65 * Generally slit. At Locking Elements in slit version F O is eliminated in the calculation. To continue see next page RfN

68 RINGFEDER Locking Elements RfN 8006 Locking screw calculation Locking screw table The torque transmission capacity of a RINGFEDER Locking Element connection is directly proportional to the effective clamping force F A. As clamping elements normally locking srews are used which act on the Locking Elements via a thrust flange. According to the required tension force, the selection according to screw quality, size and quantity can be done according to the chart below. Regular thread 1), metric d G T A F V T A F V T A F V M M M M M M M M M M M M M M Nm = lb-ft 1 N = lb BOLT SIZE BOLT DIA. Regular thread, inch F V T A BOLT SIZE BOLT DIA. Inch Inch lbs lb-in Inch Inch lbs lb-ft /4" /4" /16" /16" /8" /8" /16" /16" /2" /2" /16" /16" F V T A Concentricity The relatively narrow RINGFEDER RfN 8006 Locking Elements mainly serve the purpose of transmitting large torques and axial forces. They are not self-centering. The concentricity accuracy of the clamped hub therefore depends on the centering and care of the installation. Locking Elements RfN 8006 can centre themselves within the framework of their production accuracy if they are absolutely plane-parallel when pressed together. 68

69 Locking Element dimensions Clamping force Transmissible torques Locking element Diameter spacer or axial forces sleeve inside outside d x D d D L L 3 A t F 0 F A T 100 F ax100 x Gw d S1 D S1 T max inch mm mm inch inch 2 lbs ft-lbs lbs inch lbs inch ft-lbs x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x Ordering example: RfN 8006 unslit Series d D RfN Ordering example: RfN 8006 slit Series d D Further details RfN G (= slit) Explanations to tables: Page 65 More sizes on request Mounting of Locking Element The values for T and F ax, apply to Locking Elements installed in oiled condition. Surface finishes For shafts and hub bores R a 1 µm Required screw tension force for Locking Elements solid: F A = F A + F 0 for Locking Elements slit: F A = F A Where n-locking Elements are used one behind the other (series), the following applies to the increase in T und F ax : T n = T 1 m and F axn = F ax1 m Retaining the values for T and F ax it is possible to reduce F A and p when using elements in series: F A n = F A /m and P N = p/m With 2 / 3 / 4 Locking Elements, m = / 1.86 / 2.03 d Element 1) Shaft Bore up to 38 E7/f7 h6 H7 above 38 E8/e8 h8 H8 1) Approx. values The fits specified have given excellent service in practical operations. Naturally, the shafts and the bores can feature other clearances. (Please contact our technical department for assistance). RfN

70 RINGFEDER Locking Elements RfN 8006 GSA Aluminum Alloy* Hub bolted clamp plate (hub axially adjustable) Shaft bolted clamp plate (hub axially fixed) Explanations d = Inner diameter d = Inner diameter (metric) D = Outer diameter C d = Machining tolerances for shaft C D = Machining tolerances for counter bore L = Overall length L 3 = Width of inner ring F 0 = Clamping force for gap filling to establish manufacturing tolerances - not for slit version F A10 = Needed clamping force to get a shaft pressure of 10,000 psi T 10 = Transmissible torque based on 10,000 psi F ax10 = Transmissible axial force based on p=10,000 psi Gw = Weight 70

71 Locking Element dimensions Clamping force d d x D C d C D L L 3 F 0 F A10 T 10 F ax10 Gw mm inch inch inch inch lbs ft-lbs lbs lbs x / / / , x / / / x / / / x / / / x / / / x / / / , x / / / x / / / x / / / x / / / x / / / x / / / x / / / x / / / x / / / x / / / x / / / x / / / x / / / x / / / x / / / x / / / x / / / x / / / x / / / x / / / x / / / 1000 Ordering example: GSA Series Size d GSA GSA * Stainless steel available upon request. * Delivery on request; other sizes stocked. Contact RINGFEDER CORPORATION for additional sizes and information. Selection Guide 1. Determine the shaft diameter to be used and the maximum torque (T) to be transmitted. T= 63,000 (lb-in) x HP RPM 2. Select a locking element from the specification table for the shaft diameter. Verify that the transmissible torque (T) for the element meets the torque requirement. Note: Required peak torque should never exceed specified transmissible torque (T ). Higher torque capacitites can be obtained by increasing the locking force. 3. Determine the required locking force (F A ). A pre-load (F O ) is required to bridge the clearance for the specified fits. The total required locking force is F A =F O + F A. The locking force is normally obtained by using one or more screws and a clamp plate. 4. Refer to screw tables on page 64 to determine the number, size and grade of screws needed for the required locking force and individual screw clamp load. Clamp load/screw = required locking force (F A ) or F A number of screws (z) GSA 71

72 RINGFEDER Stainless steel products STAINLESS STEEL 72

73 Locking Assemblies Locking Elements RfN 7012 stainless steel RfN 8006 solid stainless steel RfN 7061 stainless steel RfN 8006 slit stainless steel RfN 7110 stainless steel 73

74 RINGFEDER Stainless steel products Characteristics Inexpensive manufacture the large tolerances that are possible and the simple turning process guarantee inexpensive manufacture. Simple installation only a few screws need to be tightened, alignment to precise angles between the hub and shaft is possible in any position, no fitting at assembly required. Simple dismantling RINGFEDER Locking Assemblies are fitted with threaded extraction holes, so that no additional auxiliary equipment is necessary, series RfN 7012 is self-releasing. Large constant reverse-torsion fatigue strength shaft and hub are ungrooved, so that there is no weakening of these components. Shaft and hub can be designed to be considerably smaller (light, cost and space-saving design possible). No danger of deflection RINGFEDER Locking Assemblies are absolutely backlashfree. Effect similar to overload protection after the set frictional connection force has been exceeded the Locking Assemblies simply slide. Valuable machine parts are protected. The Locking Assemblies are subject to the same laws as any other connection with force transmission by friction - not suitable as sliding clutch. Completely maintenance-free no follow-up costs. 74

75 Explanations to tables Basic dimensions when screws are not tightened d d D D B1 L L 1 L 3 L 4 T F ax p W p N n Sc D G T A = Inner diameter (decimal notation) = Inner diameter = Outer diameter = Collar outer diameter = Overall length = Overall length without screws = Width of inner ring = Installation length up to collar = Transmissible torque at given T A = Transmissible axial force = Surface pressure on shaft at given T A = Surface pressure on hub at given T A = Quantity of screws = Thread = Max. tightened torque of the clamping screws D N min = Min. hub outer diameter depending of the given hub yield point (Rp 0,2 ) T max Gw = Maximum transmissible torque = Weight STAINLESS STEEL 75

76 RINGFEDER Locking Assemblies RfN 7012-IN stainless steel Characteristics Slimmest design, especially suitable for applications where space is limited. The Locking Assembly RfN 7012 stainless steel compensates small tolerance deviations and compensates small mounting errors. Large transmittable forces and moments several Locking Assemblies RfN 7012 stainless steel can be placed one behind the other. The transmissible torque and axial forces are added - please take in this respect consulting with our technical experts. Easy installation in comparison to cross-press fits temperature treatments and fitting are eliminated. Locking Assemblies RfN 7012 stainless steel can cover a big fitting clearance. STAINLESS STEEL Low risk to contamination during tightening process the functional surfaces of the device and connection are pressed together generating a surface pressure that does not allow the ingress of contamination. Adjustable transmission values the locking screw torque can be changed giving a corresponding change in transmission values. RfN 7012 stainless steel Locking Assemblies can be tightened and released repeatedly. Example applications: Chain wheels, levers, pulleys, slip-on gear mechanisms, belt drums, running wheels, cable sheaves L L 1 L 3 d D Locking Assembly RfN 7012 stainless steel Dimensions 76

77 Locking Assembly dimensions Transmissible torques Surface pressure Locking screws D N min. or axial forces ISO 4762-A2-70 Rp0,2 [N/mm 2 ] Shaft Hub d d x D L L 1 L 3 T F ax p W p N n Sc D G T A Gw D HG inch inch inch ft-lbs lbs psi pcs. ft-lbs lbs inch inch /4 x M 6 x M x M 6 x M /8 x M 6 x M /16 x M 6 x M /4 x M 6 x M /8 x M 6 x M /16 x M 6 x M /2 x M 6 x M /8 x M 8 x M /16 x M 8 x M /4 x M 8 x M /8 x M 8 x M /16 x M 8 x M x M 8 x M /8 x M 8 x M /16 x M8 x M /4 x M 8 x M /8 x M 8 x M /16 x M 8 x M /2 x M 8 x M /16 x M 8 x M /8 x M 10 x M /16 x M 10 x M /4 x M 10 x M /8 x M 10 x M /16 x M 10 x M Ordering example: RfN 7012-IN Surface finishes for shafts and hub bores R a 3,2 µm Series d D Further details RfN 7012-IN SST (= stainless steel) Explanations to tables: Page 75 More sizes on request Mounting of Locking Assembly The Locking Assemblies are supplied slightly oiled and ready-to-use. The values for T, F ax, p W and p N apply to Locking Assemblies in delivery condition. Surface finishes for shafts and hub bores Ra 3,2 µm Tolerances We recommend the following mounting tolerances Shaft: k9-h9; Hub: N9-H9 Max. permissible: Shaft: k11-h11; Hub: N11-H11 To avoid excessive deformations of the relatively thickwalled thrust rings, the Locking Assembly should be located as symmetrically as possible between shaft and hub bore. If the shaft is smaller than nominal d, the bore should exceed nominal D to the same extent and vice versa. The concentricity quality is determined by the direct centering between shaft and hub. Arrangement of several Locking Assemblies RfN 7012 stainless steel If several Locking Assemblies are to be installed the transmission values of the table can be added when the Locking Assemblies are located within a distance of 4 L. Change of screw tightening torques The Locking Assemblies are generally equipped with A2-70 grade screws. A reduction of the screw tightening torque is possible. (Please contact our specialists for assistance). Auxiliary Threads To facilitate removal, the front thrust rings have auxiliary threads. Calculation hub outer diameter Factor C=6 see page 92 RfN 7012-IN 77

78 RINGFEDER Locking Assemblies RfN 7012 stainless steel Characteristics Slimmest design, especially suitable for applications where space is limited. The Locking Assembly RfN 7012 stainless steel compensates small tolerance deviations and compensates small mounting errors. Large transmittable forces and moments several Locking Assemblies RfN 7012 stainless steel can be placed one behind the other. The transmissible torque and axial forces are added - please take in this respect consulting with our technical experts. Easy installation in comparison to cross-press fits temperature treatments and fitting are eliminated. Locking Assemblies RfN 7012 stainless steel can cover a big fitting clearance. STAINLESS STEEL Low risk to contamination during tightening process the functional surfaces of the device and connection are pressed together generating a surface pressure that does not allow the ingress of contamination. Adjustable transmission values the locking screw torque can be changed giving a corresponding change in transmission values. RfN 7012 stainless steel Locking Assemblies can be tightened and released repeatedly. Example applications: Chain wheels, levers, pulleys, slip-on gear mechanisms, belt drums, running wheels, cable sheaves L L 1 L 3 d D Locking Assembly RfN 7012 stainless steel Dimensions 78

79 Locking Assembly dimensions Transmissible torques Surface pressure High-strength special screw min. D N or axial forces acc. ISO 4762 Rp0,2 [N/mm 2 ] Shaft Hub d x D d x D L L 1 L 3 T F ax p W p N n Sc D G T A Gw T max mm inch inch ft-lbs lbs psi pcs. ft-lbs lbs inch ft-lbs 19 x x M 6 x x x M 6 x x x M 6 x x x M 6 x x x M 6 x x x M 6 x x x M 6 x x x M 6 x x x M 6 x x x M 6 x x x M 6 x x x M 8 x x x M 8 x x x M 8 x x x M 8 x x x M 8 x x x M 8 x x x M 8 x x x M 10 x x x M 10 x x x M 10 x x x M 10 x x x M 10 x x x M 10 x x x M 12 x x x M 12 x x x M 12 x x x M 12 x x x M 12 x x x M 12 x Ordering example: RfN 7012 Series d D Further details RfN SST (= stainless steel) Explanations to tables: Page 75 More sizes on request Mounting of Locking Assembly The Locking Assemblies are supplied slightly oiled and ready-to-use. The values for T, F ax, p W and p N apply to Locking Assemblies in delivery condition. Surface finishes for shafts and hub bores Ra 3,2 µm Tolerances We recommend the following mounting tolerances Shaft: k9-h9; Hub: N9-H9 Max. permissible: Shaft: k11-h11; Hub: N11-H11 To avoid excessive deformations of the relatively thickwalled thrust rings, the Locking Assembly should be located as symmetrically as possible between shaft and hub bore. If the shaft is smaller than nominal d, the bore should exceed nominal D to the same extent and vice versa. The concentricity quality is determined by the direct centering between shaft and hub. Arrangement of several Locking Assemblies RfN 7012 stainless steel If several Locking Assemblies are to be installed the transmission values of the table can be added when the Locking Assemblies are located within a distance of 4 L. Change of screw tightening torques The Locking Assemblies are generally equipped with A2-70 grade screws. A reduction of the screw tightening torque is possible. (Please contact our specialists for assistance). Auxiliary Threads To facilitate removal, the front thrust rings have auxiliary threads. Calculation hub outer diameter Factor C=6 see page 92 RfN

80 RINGFEDER Locking Assemblies RfN stainless steel Characteristics Excellent concentricity and very easy to dismantle these self-centering Locking Assemblies provide particularly good concentricity between the clamped parts. The flange is reinforced at the critical point, preventing bending or lifting of the inner ring during assembly and thereby ensuring easy dismantling. High rotation speed the dimensional accuracy allows their use in applications with higher rotational speeds. High radial loads the material strength makes them especially suitable for applications with high radial loads. STAINLESS STEEL Axial hub positioning the increased outer diameter of the flange prevents the axial movement of the hub during assembly and improves the run-out ability of the locking assembly. Example applications: Chain wheels, levers, pulleys, slip-on gear mechanisms, belt drums, running wheels, cable sheaves L L 1 L 4 L 3 d DB1 D Locking Assembly RfN stainless steel Dimensions 80

81 Locking Assembly dimensions Transmissible torques Surface pressure High-strength special screw or axial forces acc. ISO 4762 Shaft Hub d x D d x D L L 1 L 3 L 4 D B1 T F ax p W p N n Sc D G T A Gw T max mm inch inch inch ft-lbs lbs psi pcs. ft-lbs lbs ft-lbs 19 x x M 6 x x x M 6 x x x M 6 x x x M 6 x x x M 6 x x x M 6 x x x M 6 x x x M 6 x x x M 6 x x x M 6 x x x M 6 x x x M 8 x x x M 8 x x x M 8 x x x M 8 x x x M 8 x x x M 8 x x x M 8 x x x M 10 x x x M 10 x x x M 10 x x x M 10 x x x M 10 x x x M 10 x x x M 10 x x x M 10 x x x M 10 x x x M 12 x x x M 12 x x x M 12 x Ordering example: RfN Series d D Further details RfN SST (= stainless steel) Explanations to tables: Page 75 More sizes on request Mounting of locking assembly The locking assemblies are supplied slightly oiled and readyto-use. The values for T, F ax, p W and p N apply to locking assemblies installed in the delivery condition. Surface finishes For shafts and hub bores Ra 1,6 µm Tolerances We recommend the following mounting tolerances Shaft: h8; Hub: H8 Arrangement of several Locking Assemblies RfN stainless steel Arrangement only possible from 2 sides. If several locking assemblies are used to increase the transmission values the clamping systematization has to be considered. Change of screw tightening torques A change of the TA-values given in the above table is not admissible. RfN

82 RINGFEDER Locking Assemblies RfN 7061 stainless steel L N 2 L - L 1 DN STAINLESS STEEL Locking Assembly RfN 7061 Location Calculation of hubs see on page (Calculation possible for other hub forms in our calculation program) L L 1 Characteristics Self-centering 2-piece Locking Assem blies for medium torques. During mount ing, minor axial displacement of the hub occurs in opposite direction of the screw head. Due to the small number of screws, cost savings during mounting are ensured. For disassembly only few release screws are required. d D Locking Assembly RfN 7061 Dimensions 82

83 Locking Assembly dimensions Transmissible torques Surface pressure High-strength special screws or axial forces acc. ISO 4762 Shaft Hub d x D d x D L L 1 T F ax p W p N n Sc D G * T A Gw mm inch inch ft-lbs lbs psi pcs. ft-lbs lbs 6 x x M x x M x x M x x M x x M x x M x x M x x M x x M x x M x x M x x M x x M x x M x x M x x M x x M x x M x x M x x M x x M x x M x x M x x M x x M x x M x x M x x M x x M x x M *REMARK! Size M 2,5 locking screws ISO A2-70. Ordering example: RfN 7061 Series d D Further details RfN SST (= stainless steel) Explanations to tables: Page 75 More sizes on request Surface finishes For shafts and hub bores Ra 3,2 µm Tolerances We recommend the following mounting tolerances Shaft: h8; Hub: H8 RfN

84 RINGFEDER Locking Assemblies RfN 7110 stainless steel L L 1 L 4 d D DB1 Locking Assembly RfN 7110 Dimensions Characteristics Specially small dimensioned self-centering Locking Assembly without axial displacement. As the locking srews are located out of the actual clamping area and the pressures are relatively low, the hub can be designed economically small. STAINLESS STEEL 84

85 Locking Assembly dimensions Transmissible torques or axial forces Surface pressure Shaft Hub High-strength special screws acc. ISO 4762 d x D d x D L L 1 L 4 D B1 T F ax p W p N n Sc D G T A Gw mm inch inch inch ft-lbs lbs psi pcs. ft-lbs lbs 8 x x M x x M x x M x x M x x M x x M x x M x x M x x M x x M x x M x x M x x M x x M x x M x x M x x M x x M x x M x x M x x M x x M x x M x x M x x M x x M Ordering example: RfN 7110 Series d D Further details RfN SST (= stainless steel) Explanations to tables: Page 75 More sizes on request Surface finishes For shaft bores Ra 3,2 µm For hub bores Ra 1,6 µm Tolerances We recommend the following mounting tolerances Shaft: h8; Hub: H8 RfN

86 RINGFEDER Locking Elements RfN 8006 stainless steel X L L 3 d D DS1 ds1 d D RINGFEDER Locking Element RfN 8006 stainless steel Location solid RINGFEDER Locking Elements RfN 8006 stainless steel Dimensions slit STAINLESS STEEL V-belt pulley 86

87 Locking Element dimensions Clamping force Transmissible torques Locking element Diameter spacer or axial forces sleeve inside outside d D d x D L L 3 A t F 0 F A T 100 F ax100 x Gw d S1 D S1 T max mm mm inch inch inch 2 lbs ft-lbs lbs inch lbs inch ft-lbs *6 9 * x *7 10 * x *8 11 * x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x Explanations to tables on page 75 * Generally slit. At Locking Elements in slit version F O is eliminated in the calculation. More sizes on request Ordering example: RfN 8006 solid Ordering example: RfN 8006 slit Series d D Further details RfN SST (= stainless steel) Series d D Further details RfN SST-G (= stainless steel, slit) RfN

88 Special Solutions 88

89 Locking Assemblies RfN RfN

90 Special Solutions Special Solution Locking Assemblies Where the use of standard Locking Assemblies is not sufficient we develop special solutions optimised to specific customer requirements so that the parts are ideal for the specific application. In this way it is possible to make use of applications which previously were not possible. RfN

91 Special Solutions Special Solution Locking Assemblies Where the use of standard Locking Assemblies is not sufficient we develop special solutions optimised to specific customer requirements so that the parts are ideal for the specific application. In this way it is possible to make use of applications which previously were not possible. RfN

92 Calculation of hub and shaft Calculation Equations for thick-walled cylinders give good service in the estimation of the tangential (tension) stresses occurring in the hub and hollow shaft. Exact determination of the true stresses and deformations (expanding, contraction) is very difficult in view of the wide scatter of the coefficients of friction and because of the differing hub and hollow shaft configurations. Constructions in which Locking Assemblies are intended to be arranged under or above bearings should therefore be avoided as far as possible, or be more closely investigated (e. g. test clamping). Hub calculation Hollow shaft calculation 1) p N p d W D 1) a W = d d B 2) 3) a N = D N D tin = p N (a N 2+1) a N 2-1 ; L N = L 3 2) 3) C 3 tiw 2 p W a 2 W +1 taw p W C 3 a _ 2 W 1 a W 2 a W 2 _ 1 4) 5) 6) 7) 8) 2 p tan = N ; LN = L 3 a N 2-1 ; L N > 2L tin = C. 3 p. N (a N 2+1) 3 a N 2-1 tan = C. 3 p N. 2 a N 2-1 D N D N D. D. ; L N > 2L 3 R p0,2n R p0,2n +C 3. pn _ C3. pn R p0,2n a) + C 3. pn R p0,2n _ +2D C3. G b) pn 4) 5) 6) 7) 8) d B d B d B d R p0,2w p W d d d B tiw E W p W d (m 1) E W m R p0,2w _ 2 p W C 3 R p0,2w R p0,2w 2 p W C 3 R p0,2w a) 2D G b) c) c) 9) 10) D N p N zul. D N tan E N R p0,2n C 3 D _ 2 N D 2 D 2 N + D 2 c) a) 9) p zul. R p0,2w 1 C 3 2 d B d 2 a) L N L D N 2 p N Rp 0,2 N Streckgrenzen/ Yield strength Rp 0,2 W p W d B 2 D N D d d B L 3 92

93 Calculation of hub and shaft Sectional view C 3 = 0,6 L N 2. L 3 C 3 = 0,6 n = 1 C 3 = 0,8 L N L. (1 + n) L N L. (1 + n) DG C 3 = 0,8 n 2 C 3 = 0,8 n 1 C 3 = 1 LN = L 3 L N L. n DG C 3 = 1 n = 1 C 3 = 1 n 1 Explanation a) Cross section of the hub above the Locking Assembly, unweakened. C3 = 0,6 for one Locking Assembly and L N 2 L 3 C3 = 0,8 for two or more Locking Assemblies and L N L (1 + n); n = number of Locking Assemblies C3 = 1 for one or more Locking Assemblies and L N = L 3 or L N = L n b) If bores or threads (dg) in the hub. C3 = 0,8 if B 2 L 3 or B L (1 + n) C3 = 1 if B = L 3 or B = L n c) Approximated value. A higher scatter range is possible, as the value depends on the actual coefficient of friction and the shape of the hub. 93

94 RINGFEDER Locking Assemblies RfN 7012 If the rear thrust ring is not automatically released, the screws have to be turned out by a few threads. Light tapping against the screw heads causes the rear thrust ring to spring backwards. Should the front thrust ring jam, it is released in a similar way. The marked screws (washer) are removed from the auxiliary threads of the front thrust ring. The front thrust ring can be released and a Locking Assembly which is located deeply in the hub bore can be removed by corresponding screws. Locking Assembly RfN Part description. 1 Rear thrust ring 2 Outer ring, slit 3 Inner ring, slit 4 Front thrust ring 5 Washer 6 Locking screw d D Auxiliary thread d G Thread 94

95 Installation and removal instructions Locking Assembly RfN 7012, RfN 7012 stainless steel Installation Removal Since the force is transmitted by contact pressure and friction between functional surfaces, condition of contact surfaces and proper tightening of the locking screws are of great importance. 1. All contact surfaces, including screw threads and screw head bearing surfaces, must be clean and slightly oiled (Do not use Molybdenum Disulphide!). In this condition, the shaft, hub and Locking Assemblies are to be assembled. 2. Tighten locking screws lightly and align hub. 3. Tighten screws evenly in diametrically opposite sequence and do this in two or three stages up to the indicated tightening torque T A. 4. Recheck tightening torque by applying it to all screws all the way around. When no screw will turn anymore, the assembly is completed. Locking Assemblies RINGFEDER RfN 7012 are not selflocking. The taper of the individual rings is such that the inner and outer rings spring apart. After loosening the last screw the connection is usually disengaged. The washers under the screws protect the auxiliary (removal) threads against damage. If relatively great forces are needed to extract a Locking Assembly that has already been loosened (e. g. if the Locking Assembly has to be pushed against the weight of a heavy boss or hub), any type of removal device may be used, but the screws must only be slackened and not screwed out too far. As long as this instruction is followed, there is no objection against the use of a removal device, provided the forces applied are kept low. The auxiliary threads have only about 3-5 effective courses and are not cut right through. Do not use these holes for jack screws. Dismount and clean dirty undamaged Locking Assemblies before re-use. RfN

96 RINGFEDER Locking Assemblies RfN 7013 Mounting of a Locking Assembly RfN Mounting of a Locking Assembly RfN Removing of a Locking Assembly RfN Removing of a Locking Assembly RfN

97 Installation and removal instructions Locking Assembly RfN , RfN Installation Since the force is transmitted by contact pressure and friction between functional surfaces, condition of contact surfaces and proper tightening of the locking screws are of great importance. 1. All contact surfaces, including screw threads and screw head bearing surfaces, must be clean and slightly oiled (Do not use Molybdenum Disulphide!). In this condition, the shaft, hub and Locking Assemblies are to be assembled. Removal The Locking Assemblies RfN 7013 are to be removed in the following sequence: 1. Loosen all screws by a few turns. 2. Remove the screws adjacent to each threaded bore and screw them into these bores pressing off the outer ring. The connection is then released. 2. Tighten locking screws lightly and align hub. 3. Tighten screws evenly in diametrically opposite sequence and do this in two or three stages up to the indicated tightening torque T A. 4. Recheck tightening torque by applying it to all screws all the way around. If all screws have reached the max. tightening torque T A, the assembly is completed. 3. The connection can be either readjusted or disassembled. Remove the jack screws only after the Locking Assembly has been taken out of the hub. Dismount and clean dirty undamaged Locking Assemblies before re-use. RfN

98 RINGFEDER Locking Assemblies RfN dg Locking Assembly not tightened 1 Rear thrust ring 2 Outer ring, slit 3 Inner ring, slit 4 Front thrust ring 5 Locking screw d G Thread Locking Assembly with a screw in one of the release threads 98

99 Installation and removal instructions Locking Assembly RfN 7014 Installation Since the force is transmitted by contact pressure and friction between the functional surfaces, the condition of the contact surfaces and correct tightening of the locking screws are of great importance. 1. When originally packed, Locking Assemblies are fitted with small metal packing pieces located in the slits of the inner and outer rings. These are for shipping purposes only and MUST be removed prior to installation. 2. All contact surfaces, including screw threads and screw head bearing surfaces, must be clean and slightly oiled (Do not use Molybdenum Disulphide!). In this condition, the shaft, hub and Locking Assemblies are to be assembled. 3. Tighten locking screws lightly and align hub. 4. Tighten screws evenly in diametrically opposite sequence and do this in two or three stages up to the indicated final tightening torque T A. Removal The Locking Assemblies RfN 7014 are to be removed as follows: 1. Loosen all screws by a few threads. 2. Remove the screws adjacent to each threaded release hole and screw them into these holes. Since the rear thrust ring rests against either shaft or hub shoulder, the jack screws will automatically push apart both tapers, thus releasing the connection. 3. The connection can be either re-adjusted or disassembled. Remove the jack screws only after the Locking Assembly has been taken out of the hub. Used Locking Assemblies have to be replaced and slightly oiled prior to reinstallation. Note that the release threads of the front thrust ring have to be positioned opposite to undrilled spaces of the rear thrust ring. These threads are used for removal. 5. Recheck tightening torque by applying it to all the screws. If all screws have reached the max. tightening torque T A, the assembly is completed. RfN

100 RINGFEDER Locking Assemblies RfN 7015/7515 Figures for RfN 7015 Figure 1: Locking Assembly RfN Part description. 1 Rear thrust ring 2 Outer ring, slit 3 Inner ring, slit 4 Front thrust ring 5 Locking screw d G Thread Figure 2: Removal front thrust ring Figure 3: Removal rear thrust ring Figures for RfN 7515 see page

101 Installation and removal instructions Locking Assembly RfN , , 7515 Installation Since the force is transmitted by contact pressure and friction between functional surfaces, condition of contact surfaces and proper tightening of the locking screws are of great importance (see point 1). 1. All contact surfaces, including screw threads and screw head bearing surfaces, must be clean and slightly oiled (Do not use Molybdenum Disulphide!). In this condition, the shaft, hub and Locking Assemblies are to be assembled. 1.1 Unscrew all locking screws far enough so that only few threads are engaged in the rear thrust ring. For shipping purposes, these screws have been screwed in quite deep. 1.2 With larger Locking Assemblies, it is advantageous to insert several locking screws into the corresponding threads of the front thrust ring according to Fig. 2 and push against them. 2. After the Locking Assembly is placed in position, slightly tighten all locking screws (screwed into the rear thrust ring) and make final alignment and adjustment of the connection. 3. Tighten screws evenly in diametrically opposite sequence and do this in two or three steps up to the indicated tightening torque T A. 4. Recheck tightening torque by applying it to all screws all the way around. If all screws have reached the max. tightening torque T A, the assembly is completed. Used Locking Assemblies have to be cleaned and slightly oiled prior to installation and re-assembled according to Fig. 1 When reassembling, it is important to make sure that all threaded holes of the rear thrust ring (1) are in line with the holes in web of inner ring (3) and front thrust ring (4). Threaded removal holes in front thrust ring must be located opposite blanc spaces in web of inner ring, and the threaded removal holes in web of inner ring must be located opposite blanc spaces of rear thrust ring, see Fig. 1. RfN 7015/

102 RINGFEDER Locking Assemblies RfN 7015/7515 Figures for RfN d G Figure 1: Locking Assembly RfN Part description. 1 Rear thrust ring 2 Outer ring 3 Front thrust ring 4 Locking screw d G Thread Figure 2: Removal front thrust ring Figure 3: Removal rear thrust ring Figures for RfN 7015 see page

103 Installation and removal instructions Locking Assembly RfN , , 7515 Removal The Locking Assemblies RfN 7015 are to be removed as follows: 1. Loosen all screws by a few turns. 2. Remove the screws adjacent to each threaded bore and screw them into these bores. 2.1 The front thrust ring is released by having the jack screws pressed against the web of the inner ring (see Fig. 2). 2.2 The rear thrust ring is released by having the jack screws inserted in the threaded bore of the inner ring web and thus pushing it out (Fig. 3). 3. Pull or push hub and Locking Assemblies off the shaft. The jack screws should be removed only after the Locking Assembly has been taken out of the hub. Disassemble and clean dirty, undamaged Locking Assemblies before re-use. RfN 7015/

104 RINGFEDER Locking Assemblies RfN 7061 stainless steel Fogure 1: Mounting of a Locking Assembly RfN 7061 Figure 2: Removal of a Locking Assembly RfN

105 Installation and removal instructions Locking Assembly RfN 7061 stainless steel Installation Since the force is transmitted by contact pressure and friction between functional surfaces, the condition of the contact surfaces and proper tightening of the locking screws are of great importance (see point 1). 1. All contact surfaces, including screw threads and screw head bearing surfaces, must be clean and slightly oiled (Do not use Molybdenum Disulphide!). In this condition, the shaft, hub and Locking Assemblies are to be assembled. 2. Tighten locking screws lightly and align hub. 3. Tighten screws evenly in diametrically opposite sequence and do so in two or three steps up to the indicated tightening torque. 4. Recheck tightening torque by applying it to all screws all the way around. If all screws have reached the max. tightening torque T A, the assembly is completed. Removal The Locking Assemblies RfN 7061 are to be removed in the following sequence: 1. Loosen all screws by a few turns. 2. Remove the screws adjacent to each threaded jacking hole and screw them into these bores. 3. Tighten the jacking screws, starting with the positions furthest away from the slit first, in several steps until the connection is released. 4. The connection can then either be readjusted or disassembled. Remove the jacking screws only after the Locking Assembly has been removed from the hub. Dismount and clean dirty undamaged Locking Assemblies before re-use and slightly oil them as described in point 1 of the mounting instructions. RfN

106 RINGFEDER Locking Assemblies RfN 7110 stainless steel This connection is shown in mounted condition. During mounting, the V-belt pulley is supported by the spacer bushing at the inner ring of the Locking Assembly RfN 7110 and thus also stays axially clearly positioned. Bevel gear mounted with one Locking Assembly RfN During mounting the axial position of the bevel gear remains unchanged. 106

107 Installation and removal instructions Locking Assembly RfN 7110 stainless steel Installation Since the force is transmitted by contact pressure and friction between functional surfaces, the condition of the contact surfaces and proper tightening of the locking screws are of great importance (see point 1). 1. All contact surfaces, including screw threads and screw head bearing surfaces, must be clean and slightly oiled (Do not use Molybdenum Disulphide!). In this condition, the shaft, hub and Locking Assemblies are to be assembled. 2. Tighten locking screws lightly and align hub. 3. Tighten screws evenly in diametrically opposite sequence and do so in two or three steps up to the indicated tightening torque. 4. Recheck tightening torque by applying it to all screws all the way around. If all screws have reached the max. tightening torque T A, the assembly is completed. Removal The Locking Assemblies RfN 7110 are to be removed in the following sequence: 1. Loosen all screws by a few turns. 2. Remove the screws adjacent to each threaded jacking hole and screw them into these bores. 3. Tighten the jacking screws, starting with the positions furthest away from the slit first, in several steps until the connection is released. 4. The connection can then either be readjusted or disassembled. Remove the jacking screws only after the Locking Assembly has been removed from the hub. Dismount and clean dirty undamaged Locking Assemblies before re-use and slightly oil them as described in point 1 of the mounting instructions. RfN

108 RINGFEDER Locking Elements RfN 8006 Locking Element RfN 8006 View and section Tightening of the locking screws and distance x 108

109 Installation and removal instructions Since the force is transmitted by contact pressure and friction between functional surfaces, condition of contact surfaces and proper tightening of the locking screws are of great importance (see point 1). Installation 1. All contact surfaces, including screw threads and screw head contact surface, must be clean and slightly oiled. 2. Fit the parts in the following order: A = Hub Insert the Locking Element rings (B) according to the assembly drawing (both parts must be easy to install and must not jam under any circumstances). C = Insert compression flange (distance sleeve if necessary) or compression flange with collar. Ensure that both parts are easy to move. D = Locking screws Carefully oil the locking screws before fitting. This applies in particular to the screw head seat. ATTENTION: Do not use Molybdenum Disulphide! The screws must turn easily and to an adequate depth. Do not use spring washers or serrated locking washers. Removal 1. Loosen all screws one after the other in several steps. 2. Remove the flange. 3. Take out the Locking Elements the Locking Elements release automatically after the screws have been loosened. If not, light tapping is enough to start the releasing process. 3. Tighten locking screws lightly and align hub. 4. Tighten screws evenly in diametrically opposite sequence and do this with a torque wrench in several stages up to the indicated tightening torque ( T A ). 5. Recheck tightening torque by applying it to all screws all the way around. If all screw have reached the max. tightening torque T A, the assembly is completed. 6. Check distance x: The thrust ring must never contact the face of the hub. The gap between thrust ring and hub face should be as uniform as possible. RfN

110 Online Service Calculation program for Locking Assemblies and Locking Elements In order to meet the complex requirements on the correct design and selection of RINGFEDER products under practise-relevant demands, RINGFEDER POWER TRANSMISSION GMBH has developed a calculation program. This calculation program offers the engineer a valuable aid in his or her daily work and simplifies the calculation of a wide range of tasks. Once a product and the desired product size have been selected the program carries out the calculation, taking into account additional user input e.g. transmissible torque and axial forces, resulting hub and shaft pressure, the outer diameter of the hub, the inner diameter of the hollow shaft and for special tasks even the forces and loads under bending moment loads. Interested? Visit our Website at 110

111 Our Website Easily accessible information. RINGFEDER POWER TRANSMISSION one of the top addresses for drive and damping technology in mechanical engineering. You can find first-hand service details and information on our website. It contains both details on our entire range of products and numerous documents such as product catalogues, data sheets and assembly instruction for you to download. Visit to get right up to date. Download area Product Range and catalogues Available instructions for Installation, Removal and Maintaining 111

112 Fax Inquiry To get a design proposal for RINGFEDER shaft-hub-connection RINGFEDER POWER TRANSMISSION USA CORPORATION, Westwood/USA FAX: Addresser Company attn. Dept. Address Phone Fax We ask for a consulting discussion. Please call us under back To make it easy for our technical staff and to avoid errors or mistakes your inquiry should include the following information: Information for technical service Expected maximum loads: Max. torque T max. = Nm Max. bending moment M b max. = Nm Max. axial load F ax max. = kn Max. radial load F r max. = kn Dimensions, materials: Shaft diameter d w = mm In case of hollow shaft, internal diameter d B = mm Shaft revolution speed n = 1/min Hub outside diameter D N = mm Hub width L N = mm Hub material/yield strength R p0,2n = N/mm 2 Shaft material/yield strength R p0,2w = N/mm 2 Temperature of the connection Temp. = C Additional information: Please send us a drawing or sketch together with your inquiry! RINGFEDER POWER TRANSMISSION USA CORPORATION 165 Carver Avenue Westwood NJ USA Toll Free: Phone: Fax: sales.usa@ringfeder.com sales.usa@gerwah.com 112

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114 RINGFEDER POWER TRANSMISSION Locking Devices Locking Assemblies Locking Assemblies for bending moments Locking Assemblies Stainless steel Locking Elements Shrink Discs Flange Couplings Damping Technology Friction Springs DEFORM plus DEFORM plus R Special Solutions Locking Assemblies Shaft Couplings 114

115 Partner for Performance Couplings Torsionally Flexible Couplings Torsionally Flexible Couplings Torsionally Flexible Couplings Torsionally Rigid Gear Couplings Torsionally Rigid Barrel Coupling Couplings with variable Stiffness Couplings Metal Bellows Couplings Servo-Insert Couplings Safety Couplings Line Shafts Torsionally Rigid Disc Couplings 115

116 RINGFEDER POWER TRANSMISSION GMBH Werner-Heisenberg-Straße 18, D Groß-Umstadt, Germany Phone: +49 (0) Fax: +49 (0) RINGFEDER POWER TRANSMISSION TSCHAN GMBH Zweibrücker Strasse 104, D Neunkirchen, Germany Phone: +49 (0) Fax: +49 (0) RINGFEDER POWER TRANSMISSION USA CORPORATION 165 Carver Avenue, Westwood, NJ 07675, USA Toll Free: Phone: Fax: HENFEL INDÚSTRIA METALÚRGICA LTDA. Av. Major Hilário Tavares Pinheiro, 3447 Cer Jaboticabal - SP - Brazil Phone: Fax: vendas@henfel.com.br RINGFEDER POWER TRANSMISSION INDIA PRIVATE LIMITED Plot No. 4, Door No. 220, Mount - Poonamallee Road, Kattupakkam, Chennai , India Phone: +91 (0) Fax: +91 (0) sales.india@ringfeder.com KUNSHAN RINGFEDER POWER TRANSMISSION COMPANY LIMITED No. 10 Dexin Road, Zhangpu Town , Kunshan, China Phone: +86 (0) Fax: +86 (0) sales.china@ringfeder.com RINGFEDER POWER TRANSMISSION