High-Performance Servo-Worm Reducers Input and Output Couplings for Servo-Worm Reducers 18. Selection and Ratings for Servo-Worm Reducers 19 22
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2 Table of Contents Page High-Performance Servo-Worm Reucers 7 17 Input an Output Couplings for Servo-Worm Reucers 18 Selection an Ratings for Servo-Worm Reucers Mounting, Maintenance an Spare Parts for Servo-Worm Reucers Pinion an Output Shafts for Servo-Worm Reucers Compression Couplings for Pinions 28 Preloae Split-Pinion Output Shafts for Servo-Worm Reucers Harene & Groun Straight an Helical Pinions Mille Straight Pinions ISO Tolerances 44 Straight an Helical Racks Guie Bushings for Roun Racks 60 Ratings of Rack & Pinion Drives Torque Capacity of Keyway Connections 65 Calculations an Selection of Rack & Pinion Drives Lubrication of Rack & Pinion Drives Mounting an Maintenance of Rack & Pinion Drives 73 Servo Motor Mounting Guie for Servo-Worm Reucers
3 Orer Coe Examples Example for Servo-Worm Reucers: Servo-Worm Reucers Keyway Output Center Distance a = 80 mm Motor Mounting Type Ratio i = Servo-Worm Reucers Compression Output Center Distance a = 80 mm Motor Mounting Type Ratio i = 19.5 Example for Racks: Style an Quality Level Moule (Pitch) Mounting Holes Rack Length 4
4 Complete Prouct Range Stanar Drive Elements Chain Sprockets With various number of teeth for precision roller chain, pitch between 6 mm an 1 ½, for single an multiple chains, as isks an with one-sie hub. Also sprockets with vecobloc tensioning bushings. Mounting Hubs For sprockets Precision Roller Chains In accorance with DIN 8180/87, angle sie links, an sliing rails as chain guies. Chain Tensioners With special ball bearings, eccentric tensioning rings, etc. Tensioning Units With maintenance-free, silent rubber spring system. Frictional Hubs For limiting torque. Mille Straight Pinions In moules 1.0 to 8.0, with various number of teeth. Moules 1.0 to 3.0 also available in plastic. Harene & Groun Straight an Helical Pinions Case-harene an groun, in moules 2.0 to 8.0. Mille Straight an Helical Racks In moules 1.0 to 8.0, soft an inuction-harene, up to 2,000 mm in length. Moule 1.0 to 3.0 also available in plastic. Harene & Groun Straight an Helical Racks In moules 2.0 to 8.0, from 250 mm to 1,000 mm in length. Bevel Gear Sets In moules 1.0 to 5.0 in ratios from 1:1 to 5:1. Moules 1.0 an 1.5 also available in plastic. Stanar Worm Gearboxes Center istances from 40 mm to 125 mm, an ratios from 7:1 to 109:1. Harene & groun worm an special bronze wheel. Spline Shafts, Straight an Involute Splines Incluing corresponing sleeve an hubs. Trapezoial Threa Spinles An nuts, from 12 mm to 70 mm threa iameter, left an right-han threas, in stanar lengths. Ballscrew Spinles An nuts, rolle an harene, from 16 mm to 63 mm iameter, in stanar lengths. Shaft Couplings Rigi an flexible, for torques from 0.1 to 3,100 lb.ft. Universal Joints Ball an universal joints in accorance with DIN 808. Single an ouble versions from 8 mm to 80 mm shaft iameter. Timing Belt Drives HTD profile an trapezoial profile in accorance with DIN/ ISO 5294/96. Various number of teeth an belt lengths available. Worm Gearmotors Available reay-to-mount. With output shafts or hollow bores, in center istances 40 mm to 125 mm, an ratios from 7:1 to 82:1. Also accessories for input an output rives. Bevel Gearboxes With single or ual output shafts, with straight an spiralbevel gears. Ratios from 1:1 to 5:1. Screw Jack Gearboxes With fixe an rotating spinles, for lifting forces from 450 to 22,500 lb., oil-coole or grease lubricate. Linear Lifting Drives For use in scissor-lift tables to replace hyraulic cyliners. Up to 22,500 lb. capacity. Stanar Elements for Servo-Systems High-performance servo-worm reucers with low backlash an ajustable gearing, center istances 50 mm to 125 mm, ratios from 4.75:1 to 52:1. Accessories incluing input an output couplings, pinion output shafts an racks with straight an helical, harene & groun teeth. Special versions of all rive components accoring to customer rawings An/or own esign. Gears an change gears With mille or groun teeth up to moule 12 an moule 8.0 respectively. Chain Sprockets For precision roller chains, with 4 mm up to 1 ½ pitch in accorance with DIN 8180/8187/8188 BSA an ASA, for bushe roller chains accoring to DIN 8164, plate-link chains accoring to DIN 8150, an for special chains (transport an conveyor chains, etc.). Bevel Gears With straight teeth, crowne accoring to Gleason, up to moule 8.0. Worm Gear Sets With mille or groun teeth, up to moule Racks In moules 1.0 to 8.0, up to 3,000 mm in length. Spline shafts an sleeves In accorance with DIN 5463/5472, mille an groun. Involute spline shafts In accorance with DIN 5480/5482. Ring Gears with Internal Teeth Up to moule 5.0. Cylinrical gearboxes Bevel Gearboxes Spee-change Gearboxes Worm Gearboxes Planetary Gearboxes Spinle Lifting Gearboxes 5
5 6
6 High-Performance Servo-Worm Reucers Description ATLANTA High-Performance Servo-Worm Reucers were specifically evelope for use with the latest servo motor technology in applications that eman precise positioning an repeatability. Typical applications inclue traveling gantries, horizontal & vertical axis rives, pick & place robots, an replacements for long ball-screw axis rives. These applications often occur in the Material Hanling, Automation, CNC Machine Tool an Robotics Inustries. To reach the high level of precision that servo systems eman, several esign improvements over traitional worm gear reucers were require. The worm & wheel gear esigns were improve by increasing their quality levels an optimizing their tooth profiles for minimum backlash. A simple metho of ajusting the backlash of the gear set was also evelope, which change the centerline istance of the gear set by means of two eccentric output bearing covers. A pair of precision angular contact bearings were ae to the input shaft to eliminate any axial play at the worm gear. Robust tapere roller bearings were ae to the output shaft to allow for high raial an axial loas. With these esign improvements, we can consistently offer our units with an angular backlash of less than 2 arc-minutes, an the avantage of in the fiel ajustable backlash. The assemble unit is comprise of precision-machine parts mae from high-quality materials, which provie the unit with its high accuracy an quality level. The unit housing is aluminum for its lightweight an goo heat issipation. All faces of the housing are machine to allow for unit mounting in any position. The worm is case-harene steel; the wheel is bronze, shrunk on a steel spline hollow shaft. The internal lubricant is Shell Tivela synthetic oil (ISO V.G. 220) for minimal wear. The servo motor connection is simple with a zero-backlash motor coupling, which aapts the servo motor shaft to the spline input shaft. The connection flange properly aligns the motor shaft with the input shaft, making mounting quick an easy. Various couplings an mounting flanges are available for assembly with virtually all servo motors. The output shaft of the worm reucer is available with a keyway or a compression-type coupling. We also offer a line of accessories to aapt this output to straight shafting, rack & pinions, or other gearing types; see page 25. All imensions are in millimeters an are subject to change. For ISO tolerance values, see page 44. 7
7 High-Performance Servo-Worm Reucers Size 3, Center Distance: a o = 50 mm r M8x16 10 Counter bore for M Ø70 H8 45 D 14.7 h8 M8x , x y k 25 H Ø62 H8 f 1 G e f P8 Fig. 1 Output bore with key connection r M8x16 10 Counter bore for M D 14.7 h8 M8x , f 1 G 18 e x 85 y 118 f 1 k H6 30 h8 Fig. 2 Output bore with compression connection 8 All imensions are in millimeters an are subject to change. For ISO tolerance values, see page 44.
8 High-Performance Servo-Worm Reucers Size 3, Center Distance: a o = 50 mm Orer coe Ratio i D G7 k r x y f 1 e G Wt. (lb) J re Fig.1 Fig. 2 in.lb.s² x10 - ³ M M M M M M M a o = 40 mm an other ratios available upon request All imensions are in millimeters an are subject to change. For ISO tolerance values, see page 44. 9
9 High-Performance Servo-Worm Reucers Size 4, Center Distance: a o = 63 mm r M10x D 24.7 h M10x , x 110 y 145 k 28 H Ø72 H8 f 1 G e f P8 Fig. 1 Output bore with key connection r M10x D 24.7 h8 M10x , f 1 G Ø90 H e x y k f H6 Fig. 2 Output bore with compression connection 36 h8 10 All imensions are in millimeters an are subject to change. For ISO tolerance values, see page 44.
10 High-Performance Servo-Worm Reucers Size 4, Center Distance: a o = 63 mm Orer coe Ratio i D G7 k r x y f 1 e G Wt. (lb) J re Fig.1 Fig. 2 in.lb.s² x10 - ³ M M M M M M M M a o = 40 mm an other ratios available upon request All imensions are in millimeters an are subject to change. For ISO tolerance values, see page
11 High-Performance Servo-Worm Reucers Size 5, Center Distance: a o = 80 mm 125 r M12x Ø80 H8 f 1 G e f H6 7 Ø105 H D 37.7 h8 M12x , x 135 y 175 k 10 P8 Fig. 1 Output bore with key connection 50 r M12x D 37.7 h8 M12x , f 1 G e x 135 f 1 y k H6 Fig. 2 Output bore with compression connection 50 H8 12 All imensions are in millimeters an are subject to change. For ISO tolerance values, see page 44.
12 High-Performance Servo-Worm Reucers Size 5, Center Distance: a o = 80 mm Orer coe Ratio i D G7 k r x y f 1 e G Wt. (lb) J re Fig.1 Fig. 2 in.lb.s² x10 - ³ M M M M M M M a o = 40 mm an other ratios available upon request All imensions are in millimeters an are subject to change. For ISO tolerance values, see page
13 High-Performance Servo-Worm Reucers Size 6, Center Distance: a o = 100 mm 145 r M12x Ø100 H8 f 1 G x f 1 y H D 37.7 h8 M12x , e k 14 P8 Fig. 1 Output bore with key connection 70 r M12x D 37.7 h8 M12x , f 1 G Ø125 H8 20 e x 180 f 1 y k H6 62 h8 Fig. 2 Output bore with compression connection 14 All imensions are in millimeters an are subject to change. For ISO tolerance values, see page 44.
14 High-Performance Servo-Worm Reucers Size 6, Center Distance: a o = 100 mm Orer coe Ratio i D G7 k r x y f 1 e G Wt. (lb) J re Fig.1 Fig. 2 in.lb.s² x10 - ³ M M M M M a o = 40 mm an other ratios available upon request All imensions are in millimeters an are subject to change. For ISO tolerance values, see page
15 High-Performance Servo-Worm Reucers Size 7, Center Distance: a o = 125 mm 180 r M16x Ø160 H7 f 1 G x f 1 y H D 37.7 h8 M16x , e k 18 P8 Fig. 1 Output bore with key connection 85 r M16x D 37.7 h8 M16x , f 1 G Ø160 H8 26 e x y k f H6 80 h8 Fig. 2 Output bore with compression connection 16 All imensions are in millimeters an are subject to change. For ISO tolerance values, see page 44.
16 High-Performance Servo-Worm Reucers Size 7, Center Distance: a o = 125 mm Orer coe Ratio i D G7 k r x y f 1 e G Wt. (lb) J re Fig.1 Fig. 2 in.lb.s² x10 - ³ M M a o = 40 mm an other ratios available upon request All imensions are in millimeters an are subject to change. For ISO tolerance values, see page
17 Servo-Worm Reucer Couplings Input Couplings for Motor Connection Rigi type, nitrie, preassemble for motor shafts without key Bore on reucer sie has involute spline corresponing to DIN 5480 for push-fitting G l 1 l 2 1 Bore on motor sie has clamping elements to connect motor shaft to coupling. D 1 D 2 2 DIN 5480 l 3 L 2 l 4 L 1 G Reference iameter for mounting Orer coe Torque J re Wt. (lb) Coupling 1) 1 2 D 1 D 2 l 1 l 2 l 3 l 4 L 1 L 2 G lb.ft. in.lb.s² x10 - ³ x1.25x xM x1.25x xM x1.25x xM x1.25x xM x1.25x xM x1.25x xM x1.25x xM x1.25x xM x1.25x xM x1.25x xM x1.25x xM x1.25x xM x1.25x xM x1.25x xM x1.25x xM x1.25x xM x1.25x xM /8" 38x1.25x xM x1.25x xM x1.25x xM x1.25x xM x1.25x xM ) Spare part of clamping element Output Compression Couplings for Connecting Output Pinion Shafts to Servo-Worm series Supplie as complete set L 1 L 2 L 3 J re = J i 2 2 D l 1 3 Orer coe a D L 1 L 2 L 3 l G Torque J Wt. (lb) lb.ft. in.lb.s² x10 - ³ mm x M mm x M mm x M mm x M mm x M All imensions are in millimeters an are subject to change. For ISO tolerance values, see page 44.
18 Ratings for High-Performance Servo-Worm Reucers The values in the table are base upon servo operation an 12,000 hour life at rate torque. For continuous operation, thermal limitations must be consiere; please consult the factory. T2 max peak torque values are base on the ultimate strength of the gear teeth an shoul not be use solely in selecting a unit. P1 = Input power in horsepower; T2 = Output torque in lb.ft.; h = Unit efficiency at input spee Orer coe Input spee (rpm) a 0 i T 2 max h (mm) ratio (lb.ft.) P 1 T 2 P 1 T 2 P 1 T 2 P 1 T 2 P 1 T 2 P 1 T 2 P 1 T 2 at (hp) (lb.ft.) (hp) (lb.ft.) (hp) (lb.ft.) (hp) (lb.ft.) (hp) (lb.ft.) (hp) (lb.ft.) (hp) (lb.ft.) _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ ) _ _ ) _ _ _ _ _ _ _ _ _ _ _ _ ) For 125 mm, 4.75 ratio, state power an torque correspon to a maximum input spee of 2,200 rpm 2) For 125 mm, 6.75 ratio, state power an torque correspon to a maximum input spee of 2,800 rpm 19
19 Calculations an Selection of High-Performance Servo-Worm Reucers The values given in the ratings table on page 19 are base on uniform, smooth servo-operation. Since, in practice, applications are very iverse, it is essential to consier the given conitions by using the appropriate factors (see below). A maximum unit temperature of 176 F shoul not be exceee. Formulas for etermining power an torque with a rack & pinion rive on output: n a = [in/s²] m = W g [lb.s²/in] F T = m g + m a (for lifting axis) [lb] F T = m g µ + m a (for riving axis) [lb] F T 2req = T (/25.4) 24 [lb.ft] n 2 = 60 n (/25.4) p [rpm] i gear = n 1 T 2perm = t b n 2 T 2table K A S b B [lb.ft.] Loa Factor K A Drive Type of loa from the machines to be riven uniform meium shocks heavy shocks uniform light shocks meium shocks Operating Time Factor b B Operating time 4 8 h 8 12 h >12 h Operating time factor Safety Coefficient S The safety factor shoul be selecte base on experience, typically S = 1.1 to 1.4. The unit shoul be selecte that T 2perm. > T 2req P 1req. = T 2req n h [hp] Symbols a = acceleration or eceleration rate [in/s 2 ] b B = operating time factor = pitch iameter of pinion [mm] F T = tangential acceleration force [lb.] g = acceleration ue to gravity [386 in/s 2 ] i = gearbox ratio K A = loa factor m = mass being move [lb.s 2 /in] n 1 = input spee of gearbox [rpm] n 2 = output spee of gearbox [rpm] P 1 = input power [hp] S = safety factor t b = acceleration time [s] T 2perm = correcte acceleration torque [lb.ft.] T 2req = acceleration torque [lb.ft.] T 2table = rate output torque of reucer [lb.ft.] v = maximum linear spee [in/s] W = weight being move [lb] h = gearbox efficiency at input spee µ = coefficient of friction of axis p =
20 Calculations an Selection of High-Performance Servo-Worm Reucers Calculating Example Your Calculations Values Given Values Given Driving Axis x Lifting Axis Driving Axis Lifting Axis Weight to be move: W = 660 lb Linear spee: v = 42.5 in/s Acceleration time: t b = 0.27 s Weight to be move: W = [lb] Linear spee: v = [in/s] Acceleration time: t b = [s] Acceleration ue to gravity: g = 386 in/s² Acceleration ue to gravity: g = 386 [in/s²] Coefficient of friction: µ = Pinion pitch iameter: = mm Loa factor: K A = 1.25 Operation time factor: b B = 1.2 Safety factor: S = 1.2 Input spee from motor: n 1 = 3000 rpm Motor type: Motor manufacturer: Calculations a = n 42.5 = t b 0.27 = in/s² m = W = 660 g 386 = 1.71 lb.s²/in Coefficient of friction: µ = Pinion pitch iameter: = [mm] Loa factor: K A = Operation time factor: b B = Safety factor: S = Input spee from motor: n 1 = [rpm] Motor type: Motor manufacturer: Calculations n a = = [in/s²] t b m = W = [lb.s²/in] g F T F T = m g+m a = = lb = m g µ+m a (for riving axis only) F T = m g+m a = [lb] F T = m g µ+m a = [lb] T 2req = F T (/25.4) (63.66/25.4) = = 97.0 lb.ft n 2 = 60 n = = rpm (/25.4) p (63.66/25.4) p n 1 n 2 i gear = = 9, F T 2req = T (/25.4) = [lb.ft.] n n 2 = = [rpm] (/25.4) p n 1 n 2 i gear = Assuming 58_5_09 reucer with T 2table = lb.ft. Permissible torque T 2table, see page 19 T 2table T 2perm = = = lb.ft. K A S b B T 2table T 2perm = = = [lb.ft.] K A S b B The unit shoul be selecte such that T 2perm. > T 2req T 2perm > T 2req = lb.ft. > 97.0 lb.ft. T 2perm > T 2req = [lb.ft.] T P 1req = 2req n 2 = = 9.21 hp 5250 h T 2req n 2 P 1req = = = [hp] 5250 h Selection: 58_5_09 Servo-Worm Reucer, page 12, pinion shaft, page 25 21
21 Calculations an Selection of High-Performance Servo-Worm Reucers Efficiency of Servo-Worm Reucers with riving worm an uner full loa i = 4, i = 6,75 i = 9, i = 14,5 i = 19,5 70 Efficiency h % i = 29 i = 50 i = Input spee [rpm] Aitional forces on output l The istances given are reference values. You shoul consier the values prouce from the type of rack & pinion connecte to the output (see bottom of page 67). It is assume that the point of action of the force is the center of the shaft. In cases where aitional axial an raial forces occur, over an above the values in the table, please consult the factory. Fr Z Fa Z a Center istance a 0 (mm) Overhung istance: l (mm) Max. aitional force: Raial Fr z [lb] Axial Fa z [lb]
22 Mounting, Maintenance an Spare Parts for Servo-Worm Reucers Mounting Instructions Servo-Worm Reucers Five mounting faces with tappe holes are provie for mounting in any position. In orer to accommoate all external forces (see page 22), we recommen mounting the unit on the largest contact face, i.e. one of the two cover sies. Mounting the unit so the input worm shaft is vertical or uner the output shaft is ieal for lubrication; mounting the unit so the input worm shaft is above the output shaft will reuce the riving capacity of the unit by about 10 %. Input Motor Coupling The input motor coupling is elivere pre-assemble. Before attaching it to the motor shaft, all contact surfaces must be cleane an protecte by applying a thin oil film. An internal snap ring insie the coupling positions it on the motor shaft, preventing any axial movement of the coupling. To assemble the coupling onto the motor shaft, following these recommenations: 1. Slie the coupling onto the motor shaft until it bottoms out on the snap ring. 2. Tighten the clamping screws slightly an check the coupling for runout. 3. Tighten the screws alternating crosswise using the torque value shown in the table opposite, ensuring that the gap between the coupling an contact face remains even. 4. A final check of the runout is recommene at the en of the coupling. Orer Coe Torque lb.ft lb.ft lb.ft lb.ft. Servo-Motor Insert the motor with the mounte coupling into the pilot iameter of the motor mounting flange an bolt it to the gearbox. This shoul be one with the gearbox input shaft vertically up an the motor shaft vertically own. Output Pinion Shafts Clean the pinion shaft an hollow shaft extension an then grease or oil them lightly. For output shafts with the key connection, the internal snap ring, washer an screw provie serve to lock the output shaft axially. Insert the internal snap ring in the groove of the hollow shaft an slie the output rive shaft into the esire sie of the hollow shaft until it bottoms out. The washer an screw are attache to the output shaft from the other sie of the gearbox. The internal snap ring must be clampe between the washer an the en of the output shaft. Compression Coupling Slie the compression coupling onto the hollow shaft extension of the gearbox (o not tighten the screws beforehan!). Insert the output shaft into the esire sie of the hollow shaft until it bottoms out. Tighten the screws one after the other (not alternating crosswise) in several passes to the torque inicate in the table. Orer Coe Torque lb.ft lb.ft lb.ft lb.ft lb.ft. Maße / Dimensions in mm 23
23 Mounting, Maintenance an Spare Parts for Servo-Worm Reucers Maintenance Ajustment of Angular Backlash of Gearbox The units are assemble at the factory with the minimum amount of backlash. After prolonge use, the backlash level may increase ue to wear. It can be reset to the factory setting by moving the eccentrically supporte output shaft (the worm wheel). To achieve this, we recommen the following: 1. Unscrew the hexagon socket hea screws of the two en covers, without removing the screws, in orer to avoi oil leakage. 2. Turn both en covers towars the next higher number marke on the housing, ensuring that both covers are move by the same amount. 3. Check the backlash by turning the worm shaft until the worm wheel has mae at least one complete revolution. If necessary, ajust the en covers further by one step. 4. Evenly retighten the hexagon socket hea screws alternately crosswise. A slight change in the gear center istance (in relation to the rest of the unit) must be compensate by ajusting the mounting of the gearbox. Lubricant Change At the factory, the units are fille with a synthetic lubricant an test run. They are elivere reay for use. A check of the lubricant level once a month more frequently uring the first weeks of operation is recommene. Uner normal loa conitions an with single shift working, it is recommene that the lubricant be change every four years; with 2 or 3 shift working, the lubricant shoul be change annually. To o this, the unit must be emptie, flushe through an then refille to the oil-level hole approximately in the mile of the gearbox, using one of the lubricants liste below. Important: Synthetic lubricants must not be mixe with mineral oils. For oil quantities, see table below. We recommen the following synthetic lubricants: Shell Tivela WB, BP Energol SG-XP 220, ARAL Degol GS 220, Klüber Synth GH Shell Tivela WB, 1 liter Orer Coe: Center istance Oil quantity a o = 50 mm 0.3 liter a o = 63 mm 0.5 liter a o = 80 mm 1.2 liters a o = 100 mm 2.0 liters a o = 125 mm 4.0 liters Spare Parts Description Input Output Special angular Deep groove Tapere roller Raial seal Raial seal contact ball bearing ball bearing bearing Pieces per unit a = 50 A20x47x7 A40x62x B Orer coe a = 63 A25x62x10 A45x72x B Orer coe a = 80 A50x90x10 A50x80x B Orer coe a = 100 A50x90x10 A70x100x B Orer coe a = 125 A45x65x10 A85x130x B Orer coe Maße / Dimensions in mm
24 t Pinion an Output Shafts for Key Connection on Servo-Worm Reucers Straight Pinion Shaft, 20 pressure angle, harene & groun teeth, crowne, 16MnCr5 (AISI 51L17) G t l 1 l 2 l 3 2 k u Quality 6 e 25 (~AGMA 12) L 1 b 1 Orer Gearbox Moule No.of x k b h6 2 L 1 I 1 I 2 I 3 u t G Wt. (lb) coe size teeth M M M M M M M M M M M M Helical Pinion Shaft, left-han, 20 pressure angle, harene & groun teeth, crowne, 16MnCr5 (AISI 51L17) G l 1 l 2 l 3 2 k u Quality 6 e 25 (~AGMA 12) L 1 b 1 Orer Gearbox Moule No.of x k b h6 2 L 1 I 1 I 2 I 3 u t G Wt. (lb) coe size teeth M M M M M M M M M M M M Calculation of center istance a between rack & pinion. a h o a = z m 2 cosß + x m + h o z = number of teeth m = moule ß = helix angle h o = istance from pitch line to back face of rack x = profile moification factor All imensions are in millimeters an are subject to change. For ISO tolerance values, see page
25 Pinion an Output Shafts for Key Connection on Servo-Worm Reucers Output Shaft, short barrel. material: 16Mn Cr5 (AISI 51L17) u 2 L 1 l 1 l 2 l 4 l 5 b 2 u 1 case-harene incl. keyway t t 1 2 l 6 l 3 b 1 1 Orer Center 1j6 h6 3 L 1 I 1 I 2 I 3 l 4 l 5 l 6 u 1 u 2 t 1 t 2 b 1 b 2 Wt. (lb) coe istance mm mm Dep mm on mm pairing mm Output Shaft, long barrel, material: 16Mn Cr5 (AISI 51L17) L 1 b 2 u 2 l 1 l 2 l 4 u 1 l 5 case-harene incl. keyway t t 1 2 b 1 1 l 6 l 3 Orer Center 1j6 h6 3 L 1 I 1 I 2 I 3 l 4 l 5 l 6 u 1 u 2 t 1 t 2 b 1 b 2 Wt. (lb) coe istance mm mm Dep mm on mm pairing All imensions are in millimeters an are subject to change. For ISO tolerance values, see page 44.
26 Pinion an Output Shafts for Compression Connection on Servo-Worm Reucers Straight Pinion Shaft, 20 pressure angle, harene & groun teeth, crowne, 16MnCr5 (AISI 51L17) 1 2 b l 3 k Quality 6 e 25 (~AGMA 12) L 1 Orer Gearbox Moule No.of x k b h6 2 L 1 I 3 Wt. (lb) coe size teeth Helical Pinion Shaft, left-han, 20 pressure angle, harene & groun teeth, crowne, 16MnCr5 (AISI 51L17) 1 2 k Quality 6 e 25 (~AGMA 12) b l 3 L 1 Orer Gearbox Moule No.of x k b h6 2 L 1 I 3 Wt. (lb) coe size teeth Calculation of center istance a between rack & pinion. a h o a = z m 2 cosß + x m + h o z = number of teeth m = moule ß = helix angle h o = istance from pitch line to back face of rack x = profile moification factor All imensions are in millimeters an are subject to change. For ISO tolerance values, see page
27 Pinion an Output Shafts for Compression Connection on Servo-Worm Reucers Output Shaft, short barrel, material: 16Mn Cr5 (AISI 51L17) u 2 L 1 l 4 l 5 b 2 case-harene incl. keyway 2 Orer Center 1j6 h6 3 L 1 I 3 l 4 l 5 l 6 u 2 t 2 b 1 b 2 Wt. (lb) coe istance mm mm Dep mm on mm pairing mm u 2 L 1 l 4 l 5 b 2 t t l 6 l 3 b 1 Output Shaft, long barrel, material: 16Mn Cr5 (AISI 51L17) case-harene incl. keyway 2 b 1 l 6 l 3 Orer Center 1j6 h6 3 L 1 I 3 l 4 l 5 l 6 u 2 t 2 b 1 b 2 Wt. (lb) coe istance mm mm Dep mm on mm pairing Output Compression Couplings, for connecting Output Pinion Shafts an Pinions with Hubs Supplie as complete set L 1 L 2 L 3 J re = J i 2 2 D l 1 3 Orer coe T 2 max D L 1 L 2 L 3 l G Torque J Wt. (lb) lb.ft. lb.ft. in.lb.s² x10 - ³ x M x M x M x M x M x M x M x M x M All imensions are in millimeters an are subject to change. For ISO tolerance values, see page 44.
28 Preloae Split-Pinion Output Shafts for Compression Connection on Servo-Worm Reucers Helical Split-Pinion Shaft, left-han, 20 pressure angle, groun teeth, 16MnCr5 (AISI 51L17) Quality 7 e 25 (~AGMA 11) k b 1 b 1 b l L 1 L Orer Reucer Output T 2 (lb.ft.) T 2 max (lb.ft.) z k b b 1 1h6 2 3 l L 1 L Wt. (lb) coe Size Coupling without with max No. of preloa preloa teeth Moule Moule Moule Maximum Preloa Torque T v max Moule T v max (lb.ft.) Disc Tightening of spring layers ajusting nut Single 14 grauation marks Double 6 grauation marks Triple 10 grauation marks Note: Higher preloa values are possible by means of multiple spring layers, but the transmittable torque T 2max will be reuce. Disc springs can also be orere separately. Calculation of center istance a between rack & pinion. m a h o a = z m m = moule 2 cosß + x m + h o ß = helix angle h o = istance from pitch line to back face of rack az = number of teeth x = profile moification factor ho 28.1 All imensions are in millimeters an are subject to change.
29 Operation an Ajustment of Preloae Split-Pinion Output Shafts Description of Operation Preloae split-pinions are typically use to eliminate axis backlash for high accuracy positioning applications. The pinions effectively eliminate the backlash between the rack & pinion by using two pinions one to rive the axis an one to preloa the axis to eliminate the backlash. Eliminating the system backlash preserves accurate axis positioning uring the transition perio between acceleration/steay state an eceleration, when the rack & pinion flank contact an loa reverses irection. To insure no backlash evelops, the preloa torque must be set higher than the eceleration torque. Split-pinion shafts consist of an output shaft, a helical split-pinion an a preloa section. The split pinion is manufacture as a set with an axial gap of 1.0 mm. By reucing this istance between the pinion halves (by axial movement of the outer pinion), the backlash is reuce an the preloa is initiate when the teeth are in mesh with the rack. A specific preloa torque between the rack an split-pinion can be prouce with the preloa section. Ajusting Instructions The preloa section consists of: An ajusting nut, which is locke to prevent turning by means of a safety washer an set screw. A isc spring assembly A thrust plate The outsie of the thrust plate is provie with 24 marks an the ajusting nut with 4 marks (grauations). Before tightening the ajusting nut, the center istance between the rack an splitpinion shoul be set so that the backlash is less than 0.1 mm (0.004 ). A goo tooth contact pattern must be obtaine as with orinary rack an pinion rives. Then, after loosening the set screw, the ajusting nut can be tightene until no backlash remains, i.e. until both tooth flanks of the split-pinion are in contact with the rack. This can be checke with a ial inicator on the tooth flanks. The next step is to begin to turn the ajusting nut by a certain number of grauation marks (TS) to prouce the esire preloa torque value. It is not always necessary to set the maximum preloa torque value as shown in the table on the previous page. These values can be use as a starting point if the preloa torque require (for the esire positioning accuracy) is not known. The preloa torque value may have to be change to obtain the esire performance. If, for example, a preloa torque value of 50% T 2max is sufficient in the application, the transmittable torque T 2max value in the table can be exceee by 50%. 1 mm without pre-loa For more information, please consult the factory. Lubrication Recommenations It is recommene that an automatic lubrication system, such as the ones shown on pages 69 72, be use to lubricate the split-pinion an rack. The felt gear applicator can mesh irectly with the split-pinion, since the elasticity of the felt teeth can hanle the maximum backlash compensation. 28.2
30 0.01 A u 0.1 B b 2 B k N t Harene & Groun Straight Pinions Moule 2.0 Straight Pinions, 20 pressure angle, harene & groun teeth, with bore Ø H6 an keyway, 16MnCr5 (AISI 51L17) Ú 0.05 A b 2 b 1 Quality 7 e 25 (~AGMA 11) k Nh8 b 1 A 1 Fig. 1 Fig Fig. 3 Keyway mile of tooth gap Orer Fig. No of Compression coe teeth k H6 1 N b 1 b 2 u t Wt. (lb) Coupling z On page 28 Moule All imensions are in millimeters an are subject to change. For ISO tolerance values, see page
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