FAG Split Spherical Roller Bearings

Transcription

1 Saving cost by rapid bearing replacement at locations of restricted access FAG Split Spherical Roller Bearings Rolling Bearings FAG Norge A/S FAG Svenska AB Publ. No. WL Enosv

2 Saving cost by rapid bearing replacement at locations of restricted access FAG Split Spherical Roller Bearings Publ. No. WL EA FAG OEM und Handel AG A company of the FAG Kugelfischer Group Postfach 1260 D Schweinfurt Phone (09821) 91-0 Telefax (09721) Telex fag d

3 Preface The OEM und Handel company of FAG Kugelfischer Georg Schäfer AG supplies rolling bearings, accessories and services to original equipment customers in the machine and plant construction sector as well as customers in the distribution and replacement sector. Broad rolling bearing know-how, competent advice fopecific applications and extensive customeervice for more operational reliability make FAG an indispensable partner to its customers. The development and progressive development of our products is based on the requirements of their future operation in the field. Ideally, the outline of requirements is drawn up jointly by our researchers and application engineers in cooperation with the machine manufacturers and operators. This forms the basis for convincing solutions both technically and economically speaking. Our production sites are situated in Germany, Italy, Portugal, the USA and India. Marketing is effected through a network of subsidiaries and business partners spanning almost the whole world. FAG 2

4 Contents Time-saving bearing replacement Cost reduction Ranges of application Fitting into split plummer block housings Bearing design Load carrying capacity High-speed suitability Fits Lubrication Split spherical roller bearings in metric dimensions Split spherical roller bearings in inch dimensions Cost reduction due to shorter downtimes FAG

5 Time-saving bearing replacement Cost reduction Ranges of application Fitting into split plummer block housings Time-saving bearing replacement at locations of restricted access Split spherical roller bearings are mainly used for applications where the replacement of an unsplit spherical roller bearing would require intricate additional work, e.g. where gearwheels or couplings have to be withdrawn, drives dismounted, and shaftings disassembled. With split spherical roller bearings the downtimes of machines and plants is reduced and thus the production cost as well. Cost reduction Calculation examples on pages 26 and 27 show the extent of cost reduction which can be achieved by using split spherical roller bearings instead of unsplit ones. In one case the cost reduction amounts to about DM 80,000.00, in the other one even to about DM 430, We have provided a form on page 28 which you may use to draw up a similar cost comparison for one of your applications. The filled-in form is a useful basis for talks with ouervice engineers. With new constructions split spherical roller bearings help in many cases to save considerable cost since they simplify the assembly and facilitate mounting. Ranges of application Applications range from shafts supported by several bearings to bearing locations of restricted access, for example: belt drives ships conveyor plants rolling mills ventilation systems paper machines Replacement bearings fopherical roller bearings with adapteleeve The dimensions of FAG split spherical roller bearings were adapted so that they can be used instead of unsplit spherical roller bearings and their adapteleeves. Outside diameter, outer ring width and shaft seat diameter are identical. Fitting into split plummer block housings FAG split spherical roller bearings can be mounted into FAG split plummer block housings without requiring any further machining of the housings. The same applies to housings from other manufacturers provided that the internal dimensions are identical. Conveyor plant drive unit Ventilator drive unit FAG 4

6 Time-saving bearing replacement Fitting into split plummer block housings 1: Easy bearing replacement as split spherical roller bearings (top) require the same mounting space as unsplit bearings with adapteleeves (bottom). 2: Easy to inspect, fast and easy mounting the FAG split spherical roller bearing directly before mounting into an SNV housing. 5 FAG

7 Bearing design FAG split spherical roller bearings have a cylindrical bore. Inner ring, outer ring and roller/cage assembly are split into halves. The split bearing rings are bolted together. The internal design of the split spherical roller bearings was adapted from the well-proven spherical roller bearings of design E so that the bearings have maximum load carrying capacity. The bearings are equipped either with a split moulded cage of glass-fibre reinforced polyamide (suitability for high temperatures, see FAG catalogue WL ) or with a split machined brass cage. Split spherical roller bearings have the normal tolerances of unsplit radial bearings and the normal clearance of unsplit spherical roller bearings with a cylindrical bore (DIN 620). In this publication the standard design of split spherical roller bearings is described where the locking rings are integrated in the inner rings. FAG split spherical roller bearings with separate locking rings are recommended for applications where considerable temperature differences between shaft and inner ring halves may have to be accommodated, e.g. dryer rolls of paper machines. Information on this special design will be supplied by FAG on request (cp. FAG video The Installation of Split Spherical Roller Bearings in the Dryer Section of a Paper Mill ). 3: The internal design corresponds to the well-proven E design. Fitting bolts Outer ring halves Inner ring halves Fitting bolts Cheese head screws Cheese head screw Fitting bolt Polyamide cage Cage halves with rolleets Brass cage FAG 6

8 Load carrying capacity High-speed suitability Fits Lubrication Load carrying capacity The load carrying capacity of split spherical roller bearings is smaller than that of unsplit spherical roller bearings since the pitch circle for the roller/cage assembly is reduced due to the outer ring bolting. Nevertheless, a high load carrying capacity is achieved by providing the largest possible number of rollers with the largest possible diameter (E design). Cycling of the separating joint is taken into consideration in calculating the equivalent dynamic load by the impact factor 1.1. Bearing dimensioning is effected in accordance with the usual calculation procedure indicated in FAG catalogue WL High-speed suitability The bearing tables indicate the kinematically permissible speeds. These values take into account the cage strength and the vibrations caused by cycling of the seperating joints. In cases where the kinematically permissible speeds are exceeded FAG Application Engineering must be consulted. Fits The shaft has to be machined to h6...h9 in order to attain the required tight inner ring fit after bolting. These shaft tolerances are also used for unsplit bearings mounted with adapteleeves. Usually, the housing bore is machined to H7 or H8. Lubrication FAG split spherical roller bearings are usually lubricated with a lithium soap base grease of penetration class 2 with EP additives. The lubrication intervals are identical with those of unsplit bearings. Split spherical roller bearings may be relubricated via a groove and holes in the outer ring. 7 FAG

9 FAG spherical roller bearings split, in metric dimensions B B B i B i d D d D Polyamidmassivkäfig Moulded polyamide cage Machined brass cage Messingmassivkäfig Suffix: T T MA MA Shaft Dimensions Load rating Factor Weight Permissible Kinematically dyn. stat. axial permissible loads*) speeds d D B B i C e Y Y C 0 Y 0 min F a /F r e F a /F r > e mm kn kn kg kn min The designs printed in bold face are produced in series. Information on other designs will be supplied on request. Equivalent dynamic load Equivalent static load P = 1.1 (F r + Y F a ) [kn] F a /F r e P 0 = F r + Y 0 F a [kn] P = 1.1 (0.67 F r + Y F a ) [kn] F a /F r > e *) For inner rings which are not axially supported. P/C must be equal to or less than 0.2 to prevent the inner rings from creeping on the shaft in circumferential direction. Higher values are permissible if the speed is much lower than the kinematically permissible speed. Please consult our experts in such cases. FAG 8

10 Examples for bearing exchange in plummer block housings split bearings unsplit bearings Floating Loslager bearing Locating Festlager bearing Floating Loslager bearing Housing: S30 S30 S30 S30 SNV SNV Bolt tightening torque Code Can replace unsplit spherical roller Matching plummer bearings with adapteleeve block housings**) Inner ring Outer ring Bearing Bearing Adapteleeve M i M a N m N m FAG FAG FAG SM55T 22212K H312 SNV SM60T 22213K H313 SNV SM65T 22215K H315 SNV SM70T 22216K H316 SNV SM75T 22217K H317 SNV SM80T 22218K H318 SNV SM85T 22219K H319 SNV SM90T 22220K H320 SNV SM100MA 23122K H SM100T 22222K H322 SNV SM110MA 23024K H3024 S3024K SM110MA 23124K H SM110T 22224K H3124 SNV215 1 ) SM115MA 23026K H3026 S3026K SM115MA 23126K H SM115T 22226K H3126 SNV230 1 ) SM125MA 23028K H3028 S3028K SM125MA 23128K H SM125T 22228K H3128 SNV250 1 ) **) The bearings also fit into housings from other manufacturers provided the inside dimensions are the same. Seals, covers and locating rings for SNV housings, see FAG catalogue WL ) Housing with eye bolt 9 FAG

11 FAG spherical roller bearings split, in metric dimensions B B B i B i d D d D Polyamidmassivkäfig Moulded polyamide cage Machined brass cage Messingmassivkäfig Suffix: T T MA MA Shaft Dimensions Load rating Factor Weight Permissible Kinematically dyn. stat. axial permissible loads*) speeds d D B B i C e Y Y C 0 Y 0 min F a /F r e F a /F r > e mm kn kn kg kn min The designs printed in bold face are produced in series. Information on other designs will be supplied on request. Equivalent dynamic load Equivalent static load P = 1.1 (F r + Y F a ) [kn] F a /F r e P 0 = F r + Y 0 F a [kn] P = 1.1 (0.67 F r + Y F a ) [kn] F a /F r > e *) For inner rings which are not axially supported. P/C must be equal to or less than 0.2 to prevent the inner rings from creeping on the shaft in circumferential direction. Higher values are permissible if the speed is much lower than the kinematically permissible speed. Please consult our experts in such cases. FAG 10

12 Examples for bearing exchange in plummer block housings split bearings unsplit bearings Floating bearing Locating bearing Floating bearing Housing: SD Loslager S30 Festlager SNVLoslager SD S30 SNV Bolt tightening torque Code Can replace unsplit spherical roller Matching plummer bearings with adapteleeve block housings**) Inner ring Outer ring Bearing Bearing Adapteleeve M i M a N m N m FAG FAG FAG SM135MA 23030K H3030 S3030K SM135MA 23130K H SM135T 22230K H3130 SNV SM140MA 23032K H3032 S3032K SM140MA 23132K H SM140T 22232K H3132 SNV SM150MA 23034K H3034 S3034K SM150MA 23134K H3134 SD3134TS SM150T 22234K H3134 SD SM160MA 23036K H3036 S3036K SM160MA 23136K H3136 SD3136TS SM160T 22236K H3136 SD SM170MA 23038K H3038 S3038K SM170MA 23138K H3138 SD3138TS SM170T 22238K H3138 SD SM180MA 23040K H3040 S3040K SM180MA 23140K H3140 SD3140TS SM180MA 22240K H3140 SD SM200MA 23044K H3044X S3044K SM200MA 23144K H3144X SD3144TS SM200MA 22244K H3144X SD SM220MA 23048K H3048 S3048K SM220MA 23148K H3148X SD3148TS SM220MA 22248K H3148X SD548 **) The bearings also fit into housings from other manufacturers provided the inside dimensions are the same. Seals, covers and locating rings for SNV housings, see FAG catalogue WL FAG

13 FAG spherical roller bearings split, in metric dimensions B B i d D Suffix: Machined brass cage Messingmassivkäfig MA MA Shaft Dimensions Load rating Factor Weight Permissible Kinematically dyn. stat. axial permissible loads*) speeds d D B B i C e Y Y C 0 Y 0 min F a /F r e F a /F r > e mm kn kn kg kn min The designs printed in bold face are produced in series. Information on other designs will be supplied on request. Equivalent dynamic load Equivalent static load P = 1.1 (F r + Y F a ) [kn] F a /F r e P 0 = F r + Y 0 F a [kn] P = 1.1 (0.67 F r + Y F a ) [kn] F a /F r > e *) For inner rings which are not axially supported. P/C must be equal to or less than 0.2 to prevent the inner rings from creeping on the shaft in circumferential direction. Higher values are permissible if the speed is much lower than the kinematically permissible speed. Please consult our experts in such cases. FAG 12

14 Examples for bearing exchange in plummer block housings split bearings unsplit bearings Floating bearing Locating bearing Floating Loslager bearing Housing: SD Loslager S30 Festlager S30 S30 SD S30 Bolt tightening torque Code Can replace unsplit spherical roller Matching plummer bearings with adapteleeve block housings**) Inner ring Outer ring Bearing Bearing Adapteleeve M i M a N m N m FAG FAG SM240MA 23052K H3052 S3052K SM240MA 23152K H3152X SD3152TS SM240MA 22252K H3152X SD SM260MA 23056K H3056 S3056K SM260MA 23156K H3156X SD3156TS SM260MA 22256K H3156X SD SM280MA 23060K H3060 S3060K SM280MA 23160K H3160HG SD3160TS SM280MA 22260K H3160HG SD SM300MA 23064K H3064HG S3064K SM300MA 23164K H3164HG SD3164TS SM300MA 22264K H3164HG SD SM320MA 23068K H3068HG S3068K SM320MA 23168K H3168HG SD3168TS SM320MA SM340MA 23072K H3072HG SM340MA 23172K H3172HG SD3172TS SM340MA SM360MA 23076K H3076HG SM360MA 23176K H3176HG SD3176TS SM380MA 23080K H3080HG SM380MA 23180K H3180HG SD3180TS **) The bearings also fit into housings from other manufacturers provided the inside dimensions are the same. 13 FAG

15 FAG spherical roller bearings split, in metric dimensions B B i d D Suffix: Machined brass cage Messingmassivkäfig MA MA Shaft Dimensions Load rating Factor Weight Permissible Kinematically dyn. stat. axial permissible loads*) speeds d D B B i C e Y Y C 0 Y 0 min F a /F r e F a /F r > e mm kn kn kg kn min The designs printed in bold face are produced in series. Information on other designs will be supplied on request. Equivalent dynamic load Equivalent static load P = 1.1 (F r + Y F a ) [kn] F a /F r e P 0 = F r + Y 0 F a [kn] P = 1.1 (0.67 F r + Y F a ) [kn] F a /F r > e *) For inner rings which are not axially supported. P/C must be equal to or less than 0.2 to prevent the inner rings from creeping on the shaft in circumferential direction. Higher values are permissible if the speed is much lower than the kinematically permissible speed. Please consult our experts in such cases. FAG 14

16 Examples for bearing exchange in plummer block housings split bearings unsplit bearings Floating bearing Locating bearing Housing: SDLoslager SDFestlager SD SD Bolt tightening torque Code Can replace unsplit spherical roller Matching plummer bearings with adapteleeve block housings**) Inner ring Outer ring Bearing Bearing Adapteleeve M i M a N m N m FAG FAG SM400MA 23084K H3084HG SM400MA 23184K H3184HG SD3184TS SM410MA 23088K H3088HG SM410MA 23188K H3188HG SM420MA **) The bearings also fit into housings from other manufacturers provided the inside dimensions are the same. 15 FAG

17 FAG spherical roller bearings split, in inch dimensions B B B i B i d D d D Polyamidmassivkäfig Moulded polyamide cage Machined brass cage Messingmassivkäfig Suffix: T - MA MA Shaft Dimensions Load rating Factor Weight Permissible Kinematically dyn. stat. axial permissible loads*) speed d D B B i C e Y Y C 0 Y 0 min inch inch lbs F a /F r e F a /F r > e lbs lbs lbs mm kn kn kg kn min 1 2 3/ / / / / / / / / The designs printed in bold face are produced in series. Information on other designs will be supplied on request. Equivalent dynamic load Equivalent static load P = 1.1 (F r + Y F a ) [lbs, kn] F a /F r e P 0 = F r + Y 0 F a [lbs, kn] P = 1.1 (0.67 F r + Y F a ) [lbs, kn] F a /F r > e *) For inner rings which are not axially supported. P/C must be equal to or less than 0.2 to prevent the inner rings from creeping on the shaft in circumferential direction. Higher values are permissible if the speed is much lower than the kinematically permissible speed. Please consult our experts in such cases. FAG 16

18 Examples for bearing exchange in plummer block housings split bearings unsplit bearings Floating bearing Locating bearing Floating bearing Loslager Festlager Loslager Housing: SNV SNV Bolt tightening torque Code Can replace unsplit spherical roller Matching plummer bearings with adapteleeve block housings**) Inner ring Outer ring Bearing Bearing Adapteleeve M i M a ft lbs ft lbs N m N m FAG FAG FAG S K SNW H SNV S K H SNV S K SNW H SNV S K H SNV S K SNW H SNV S K SNW H SNV S K H SNV S K SNW H SNV S K H SNV S.307MA 22220K SNW H SNV S K SNW H SNV180 **) The bearings also fit into housings from other manufacturers provided the inside dimensions are the same. Seals, covers and locating rings for SNV housings, see FAG catalogue WL Designs for the North American market. The split seals for the SAF housings are supplied together with the bearing. 17 FAG

19 FAG spherical roller bearings split, in inch dimensions B B B i B i d D d D Polyamidmassivkäfig Moulded polyamide cage Machined brass cage Messingmassivkäfig Suffix: T - MA MA Shaft Dimensions Load rating Factor Weight Permissible Kinematically dyn. stat. axial permissible loads*) speed d D B B i C e Y Y C 0 Y 0 min inch inch lbs F a /F r e F a /F r > e lbs lbs lbs mm kn kn kg kn min 1 3 1/ / / / / / / The designs printed in bold face are produced in series. Information on other designs will be supplied on request. Equivalent dynamic load Equivalent static load P = 1.1 (F r + Y F a ) [lbs, kn] F a /F r e P 0 = F r + Y 0 F a [lbs, kn] P = 1.1 (0.67 F r + Y F a ) [lbs, kn] F a /F r > e *) For inner rings which are not axially supported. P/C must be equal to or less than 0.2 to prevent the inner rings from creeping on the shaft in circumferential direction. Higher values are permissible if the speed is much lower than the kinematically permissible speed. Please consult our experts in such cases. FAG 18

20 Examples for bearing exchange in plummer block housings split bearings unsplit bearings Floating bearing Locating bearing Floating bearing Loslager Festlager Loslager Housing: SNV SNV Bolt tightening torque Code Can replace unsplit spherical roller Matching plummer bearings with adapteleeve block housings**) Inner ring Outer ring Bearing Bearing Adapteleeve M i M a ft lbs ft lbs N m N m FAG FAG FAG S.308MA 22220K H SNV S K H SNV S K SNW H SNV S K SNW22x H SNV S K SNW H SNV215 1 ) S K SNW H SNV230 1 ) S K SNW26x4 1/ H SNV230 1 ) S.415MA 22228K SNW H SNV250 1 ) S K SNW H SNV250 1 ) S K H SNV250 1 ) S K SNW H SNV270 1 ) **) The bearings also fit into housings from other manufacturers provided the inside dimensions are the same. Seals, covers and locating rings for SNV housings, see FAG catalogue WL Designs for the North American market. The split seals for the SAF housings are supplied together with the bearing. 1 ) Housing with eye bolt 19 FAG

21 FAG spherical roller bearings split, in inch dimensions B B B i B i d D d D Polyamidmassivkäfig Moulded polyamide cage Machined brass cage Messingmassivkäfig Suffix: T - MA MA Shaft Dimensions Load rating Factor Weight Permissible Kinematically dyn. stat. axial permissible loads*) speed d D B B i C e Y Y C 0 Y 0 min inch inch lbs F a /F r e F a /F r > e lbs lbs lbs mm kn kn kg kn min 1 5 7/ / / / / / The designs printed in bold face are produced in series. Information on other designs will be supplied on request. Equivalent dynamic load Equivalent static load P = 1.1 (F r + Y F a ) [lbs, kn] F a /F r e P 0 = F r + Y 0 F a [lbs, kn] P = 1.1 (0.67 F r + Y F a ) [lbs, kn] F a /F r > e *) For inner rings which are not axially supported. P/C must be equal to or less than 0.2 to prevent the inner rings from creeping on the shaft in circumferential direction. Higher values are permissible if the speed is much lower than the kinematically permissible speed. Please consult our experts in such cases. FAG 20

22 Examples for bearing exchange in plummer block housings split bearings unsplit bearings Floating bearing Locating bearing Floating bearing Housing: SNVLoslager Festlager Loslager SNV Bolt tightening torque Code Can replace unsplit spherical roller Matching plummer bearings with adapteleeve block housings**) Inner ring Outer ring Bearing Bearing Adapteleeve M i M a ft lbs ft lbs N m N m FAG FAG FAG S.507MA 22232K SNW H SNV S K SNW H SNV S.508MA 23032K SNP3032x5 1/2 SAF032K/5 1/ H S K H SNV S K SNW H S K SNW34x H S K SNP3038x6 7/16 SAF038K/6 7/ H S.607MA 23136K SNP3136x6 7/16 SDAF3136K/6 7/ H S K SNW H S K SNW36x6 1/ H S K SNW H S K SNP3038x7 SAF038K/ H **) The bearings also fit into housings from other manufacturers provided the inside dimensions are the same. Seals, covers and locating rings for SNV housings, see FAG catalogue WL Designs for the North American market. The split seals for the SAF housings are supplied together with the bearing. 21 FAG

23 FAG spherical roller bearings split, in inch dimensions B B i d D Machined brass cage (no suffix if d > 7 inch) Shaft Dimensions Load rating Factor Weight Permissible Kinematically dyn. stat. axial permissible loads*) speed d D B B i C e Y Y C 0 Y 0 min inch inch lbs F a /F r e F a /F r > e lbs lbs lbs mm kn kn kg kn min 1 7 3/ / / / / The designs printed in bold face are produced in series. Information on other designs will be supplied on request. Equivalent dynamic load Equivalent static load P = 1.1 (F r + Y F a ) [lbs, kn] F a /F r e P 0 = F r + Y 0 F a [lbs, kn] P = 1.1 (0.67 F r + Y F a ) [lbs, kn] F a /F r > e *) For inner rings which are not axially supported. P/C must be equal to or less than 0.2 to prevent the inner rings from creeping on the shaft in circumferential direction. Higher values are permissible if the speed is much lower than the kinematically permissible speed. Please consult our experts in such cases. FAG 22

24 Examples for bearing exchange in plummer block housings split bearings unsplit bearings Floating bearing Locating bearing Floating bearing Housing: Loslager Festlager Loslager Bolt tightening torque Code Can replace unsplit spherical roller Matching plummer bearings with adapteleeve block housings**) Inner ring Outer ring Bearing Bearing Adapteleeve M i M a ft lbs ft lbs N m N m FAG FAG S K SNW H S K SNW44x7 1/ H3144X S K SNW H3144X S K SNW44x H3144X S K SNP3048x8 1/2 SAF048K/8 1/ H SD048K/8 1/ S K SNP3048x9 SAF048K/ H SD048K/ S K SNP3052x9 1/2 SAF052K/9 1/ H3052X.908 SD052K/9 1/ S K SNP3056x10 SAF056K/ H SD056K/ S K SNP3060x11 SDAF060K/ H SD060K/ S K SNP3160x11 SDAF3160K/ H3160HG.1100 SD3160K/11 **) The bearings also fit into housings from other manufacturers provided the inside dimensions are the same. Designs for the North American market. The split seals for the SAF and SDAF housings are supplied together with the bearing. 23 FAG

25 FAG spherical roller bearings split, in inch dimensions B B i d D Machined brass cage (no suffix if d > 7 inch) Shaft Dimensions Load rating Factor Weight Permissible Kinematically dyn. stat. axial permissible loads*) speed d D B B i C e Y Y C 0 Y 0 min inch inch lbs F a /F r e F a /F r > e lbs lbs lbs mm kn kn kg kn min The designs printed in bold face are produced in series. Information on other designs will be supplied on request. Equivalent dynamic load Equivalent static load P = 1.1 (F r + Y F a ) [lbs, kn] F a /F r e P 0 = F r + Y 0 F a [lbs, kn] P = 1.1 (0.67 F r + Y F a ) [lbs, kn] F a /F r > e *) For inner rings which are not axially supported. P/C must be equal to or less than 0.2 to prevent the inner rings from creeping on the shaft in circumferential direction. Higher values are permissible if the speed is much lower than the kinematically permissible speed. Please consult our experts in such cases. FAG 24

26 Examples for bearing exchange in plummer block housings split bearings unsplit bearings Floating bearing Locating bearing Floating bearing Housing: SDAF5 Loslager SDAF5 Festlager SDAF5 Loslager Bolt tightening torque Code Can replace unsplit spherical roller Matching plummer bearings with adapteleeve block housings**) Inner ring Outer ring Bearing Bearing Adapteleeve M i M a ft lbs ft lbs N m N m FAG FAG S K SNP3064x12 SDAF064K/ H3064HG.1200 SD064K/ S K SNP3164x12 SDAF3164K/ H3164HG.1200 SD3164K/ S K SNP3072x13 SDAF072K/ H3072HG.1300 SD072K/ S K SNP3172x13 SDAF3172K/ H3172HG.1300 SD3172K/ S K SNP3076x14 SDAF076K/ H3076HG.1400 SD076K/ S K SNP3176x14 SDAF3176K/ H3176HG.1400 SD3176K/14 **) The bearings also fit into housings from other manufacturers provided the inside dimensions are the same. Designs for the North American market. The split seals for the SAF and SDAF housings are supplied together with the bearing. 25 FAG

27 Cost reduction due to shorter downtimes Example 1: Exhaust gas ventilator Existing bearing with sleeve: 22226EK.C3+H3126 at drive end and opposite end FAG split bearing: 222SM115T Required steps in bearing mounting and dismounting Unsplit bearing 22226EK.C3 + H3126 Disassemble couplings Loosen fastening bolts (housing bases) Remove coupling (mounted with feather key and shrink fit) Remove bearing at drive end (replaced as a precaution) Remove bearing at opposite end Install new bearing at opposite end Install new bearing at drive end Split bearing 222SM115T yes yes Assembly in reverse order Cost factors Unsplit bearing 22226EK.C3 + H3126 Split bearing 222SM115T Downtime 14 hours 3 hours Downtime cost (disruption of production) 14 x DM 39, = DM 546, x DM 39, = DM 117, (DM 39,000.00/h of ventilator downtime) Man hours (2 men working 14 h each, 2 x 14 = 28 h 2 x 3 = 6 h 2 men working 3 h each) 28 x DM = DM 1, x DM = DM (hourly rate: DM 39.00) Alignment 3 hours (hourly rate: DM 65.00) 3 x DM = DM Crane rental 4 x DM = DM Replacement bearing (drive end) as a precaution DM Replacement bearing (opposite end) DM DM 1, Total cost of bearing replacement DM 549, DM 118, Cost saved by using FAG split spherical roller bearings DM 430, FAG 26

28 Example 2: Exhaust ventilator Existing bearing with sleeve: 23152K.MB + H3152XHG at drive end and opposite end FAG split bearing: 231SM240MA Cost reduction due to shorter downtimes Required steps in bearing mounting and dismounting Unsplit bearing 23152K.MB + H3152XHG Disassemble couplings at transmission input and output ends Loosen connection between foundation and electric motor Loosen fastening bolts (housing bases) Remove cover for easier lifting Use loops to suspend impeller Lift rotor using a crane Remove transmisssion using a crane (access to coupling) Remove coupling (mounted with feather key and shrink fit) Remove bearing at drive end (replaced as a precaution) Remove bearing at opposite end Install new bearing at opposite end Install new bearing at drive end Split bearing 231SM240MA no yes yes Assembly in reverse order Cost factors Unsplit bearing 23152K.MB + H3152XHG Split bearing 231SM240MA Downtime 36 h 6 h Downtime cost (DM 2,600.00/h) 36 x DM 2, = DM 93, x DM 2, = DM 15, Man hours (3 men working 18 h each, 3 x 18 = 54 h 2 x 6 = 12 h 2 men working 6 h each) 54 x DM = DM 2, x DM = DM (hourly rate: DM 39.00) Alignment 3 hours (hourly rate DM 65.00) 3 x DM = DM Crane rental 24 x DM = DM 4, Replacement bearing (drive end) DM 4, Replacement bearing (opposite end) DM 4, DM 17, Hydraulic nut RKP 260 DM 4, Total cost of bearing replacement DM 114, DM 33, Cost saved by using FAG split spherical roller bearings DM 80, FAG

29 Cost reduction due to shorter downtimes Firm/contact partner Application Existing bearing with sleeve FAG split bearing Required steps in bearing mounting and dismounting Disassemble drive unit (transmission, belt/chain, electric motor) Remove coupling halves/pulley/sprocket Support rotor on trestles Detach housing bases Lift rotor Remove housing cover Remove housing base Clean components, install and inspect new bearing Assemble housing Align housing relative to shaft Mount housing on foundation Mount coupling halves/pulley/sprocket Assemble drive unit (transmission, belt/chain, electric motor) Align drive train Total downtime in hours Unsplit bearing Split bearing Cost comparison Downtime cost Lifting equipment Special mounting tools (e.g. hydraulic nut) Labour cost (man hours) Replacement bearing (split or unsplit with adapteleeve) Alignment (equipment and labour cost) Total cost of bearing replacement Unsplit bearing Split bearing Costs saved by using FAG split spherical roller bearings FAG 28

30 Saving cost by rapid bearing replacement at locations of restricted access FAG Split Spherical Roller Bearings Every care has been taken to ensure the correctness of the information contained in this publication but no liability can be accepted for any errors or omissions. We reserve the right to make changes in the interest of technical progress. By FAG 1998 This publication or parts thereof may not be reproduced without our permission. WL Enosv/98,7/12/98