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5/9/2023 Informative ANNEX 6 1 of 58 Mfg. Ndm Vs. Speed

These Informative Annexes are for the use of the Task Force and are not to be included in the API Standards

Bearing Reference Speeds & Allowable Ndm Values for various Mfg. & Brg. types Vs API

This Annex contains a summary and back-up data used in determining the Ndm limits in SP Section 6.9 Table 6.9-2. Table 6.9-2 sets the Ndm limits above which fluid film bearings are used. Below the limits of table 6.9-2 rolling element bearings may be used if the requirements of Table 6.9-1, & 6.9-2. and 6.9.1.2 – 6.9.XX are met.

INDEX

Pg. Company

2-12 SKF13-20 NTN21-27 NSK28-36 MRC37-46 FAG47-48 Summary Table

Procedure to determine the values in Table 6.9-2.

For each of the 5 manufacturers listed above, catalogue values for each of 7 types of bearings was determined. For each bearing type 4 shaft diameters (25, 50, 75 &100mm) were chosen. For each shaft diameter, the minimum and maximum OD was tabulated. Corresponding speed limits were then determined for the 8 selections for each bearing type. The low values for each bearing types were then averaged. This average is what is tabulated in the Summary table.

The corresponding speed limits were categorized into oil lubricated, and grease lubricated. The grease lubricated limits were further subdivided into bearings with no or partial seals and those with rubbing seals (for those bearings which come with the shield or seals.) If the SP specified a certain type of cage, i.e angular contact bearings require machined cages and tapered roller bearings pressed cages, the corresponding values for these cages were used.

If no cage design is specified in the SP, the manufacturer’s catalogue ratings were manipulated, per their catalogue directions, to provide speed ratings for pressed cages. In may instances the catalogue ratings are tabulate for machined cages which generally are rated at the highest speed. A footnote then instructs the purchaser to reduce these speed limits if the bearings have pressed cage or resin designs even though the pressed or resin cage identification is next to the speed limit. One could easily misinterpret that the speeds


listed next to the bearing designation applies to that bearing. Whereas they may have to be reduced by 20-25% if machined cages are not available.

Once the speed limits for each of the referenced categories was tabulated for the 8 different sizes for each bearing type, they were averaged. This average number is the one appearing in the Summary table.

The summary table lists for the averaged speed limits for each manufacturer for each type of bearing. These averages were again averaged to obtain an industry wide average speed limit number. The lower of 80% of this industry average, or 85% of the lowest speed for each bearing was used for Table 6.9-2. The deep grooved ball bearing limit of 500 for oil lubricated applications was determined by API 610 task force experience.

The column for circulating oil or oil mist is based on the industry wide speed limit number referenced in the previous paragraph. The NSK catalogue E1101g Pg A 37 states: “ When the speeds are more than 70% of the listed limiting speed, it is necessary to select oil or grease which has good high speed characteristics” . SKF in their publication 4560 E “ Rolling bearings in industrial gearboxes pg 83 states: “ Bearing speeds which are higher than 70-80% of the catalogue speed ratings are considered high. In such cases the following influences must be taken into consideration. Heat produced as the result of the friction…temperature differential between the inner and outer races…higher minimum load..” As the result of these caveats, the speeds listed in the circulating oil and oil mist column were raised to the industry wide speed limit number referenced in the previous paragraph. It should be noted that these industry wide numbers closely agree with the corresponding numbers for circulating oil and oil mist in API 673.

For traceability, extensive references are provided in the various tabulations as to the manufacturers catalogue number reference, and year of publication, and the pages within the catalogue from which the data was extracted.


SKF(1)

dBrg IDmm/in.

DBrg ODmm

dm

d+D/2

mm

N/100

RPM

Ndm/1000

Type of Brg

Cage Design

Oil(Bath)Lower race in oil

Grease Oil(Splash)

Grease

1) Single Row Deep Groove Ball Brg

Pressed Steel or Brass (4) (5)

(2) (3) (2) (3)

API Allowable

500 [610]

380 ???

25/.9843 37 31 200 170 110 620 527 34180 52.5 110 90 577 473

50/1.9685 65 57.2 110 90 60 629 515 343130 90 63 53 567 477

75/2.9528 95 85 75 63 40 638 536 340190 132.5 43 36 570 477

100/3.9370 125 112.5 56 48 30 630 540 338215 157.5 36 30 567 472

Low Avg.

570 474 340

API as % of low Avg.

87% 80%

Note 1: Speed data from SKF Catalogue 4000 – 3rd edition 1999, pg 156-162. A later SKF catalogue 5000E dated 2003 has speeds based on ISO 15312 which are much higher and have to be substantially reduced for each application. It has been decided not to use the rating criteria in ISO 15312 since each individual application needs to be calculated, the method is based on bearings standard clearances ( we require class C3 which has increased clearances), and it assumes heat is dissipated away from the bearing to the shaft. Many of the API applications have heat input to the bearing from the shaft due to hot product conducting heat to the shaft.Note 2: Single row deep groove Bearing bearing with shields or no rubbing seals.with no seals or shields which do not contact the rotating component.Note 3: Single row deep groove bBearing with seals that rub and contact.Note 4: Referenced SKF catalog pg 150 & 156.Note 5: Machined cgs generally not available in sizes below approx. 110mm (4in.) inside diameter.


SKF(1)

dBrg IDmm/in.

DBrg ODmm

dm

d+D/2

mm

N/100

RPM

Ndm/1000

Type of Brg

Cage Design


Grease Oil(Splash)

Grease

2) Single Row Cylindrical Roller Brg

Pressed Steel or 2 piece Machined Brass roller centered design (4)

(2) (3) (2) (3)

API Allowable

450 380

25/.9843 47 36 180 150 648 54062 43.5 110 90 478 391

50/1.9685 80 65 100 85 650 553110 80 60 50 480 400

75/2.9528 115 95 67 56 637 532160 117.5 40 34 470 400

100/3.9370 150 125 50 43 625 538250 175 30 24 525 420

Low Avg.

488 402


92% 94%

Note 1: Speed data from SKF Catalogue 4000 – 3rd edition 1999, Pg 310-330. A later SKF catalogue 5000E dated 2003 has speeds based on ISO 15312 which are much higher and have to be substantially reduced for each application. It has been decided not to use the rating criteria in ISO 15312 since each individual application needs to be calculated, the method is based on bearings standard clearances ( we require class C3 which has increased clearances), and it assumes heat is dissipated away from the bearing to the shaft. Many of the API applications have heat input to the bearing from the shaft due to hot product conducting heat to the shaft.Note 2: Cylindrical roller bearings are open and do not have shields or seals.are open and do not have shields or seals.Note 3: Cylindrical roller bearings are open and do not have shields or seals.Note 4: The data in the SKF Catalogue 4000 3rd Edition 1999, only lists these bearings available in plastic cages. The 5000E June 2003 catalogue Pg 510 indicates these bearings are also available in pressed steel (J), and machined brass (M). Resin (P), pressed steel(J) (roller


centered design) & 2 piece machined brass cage (M)(Roller centered design) all are rated at the same speed i.e a 1.0 multiplier on the catalogue speeds. These are the speeds listed in this table. Two piece machined brass cage (MA) (outer ring centered), and MB (Inner ring centered) allowable speeds use 1.3 multiplier on the catalogue speeds. One piece window-type brass cage inner or outer ring centered (ML or MP) use a 1.5 multiplier on the catalogue speeds. The designations within the (XX) are SKF designations for the various types of cages.


SKF(1)

dBrg IDmm/in.

DBrg ODmm

dm

d+D/2

mm

N/100RPM

Ndm/1000

Type of Brg

Cage Design


Grease Oil(Splash)

Grease

3) Single Row Tapered Roller Brg

Pressed Steel (4)

(5)

(2) (3) (2) (3)

API Allowable

300 200

25/.9843 47 36 110 80 396 28862 43.5 80 60 348 261

50/1.9685 80 61 60 45 366 275105 80 43 32 344 256

75/2.9528 105 90 43 32 387 288160 117.5 28 19 329 223

100/3.9370 145 120 32 22 284 264215 157.5 22 16 346 252

Low Avg.

341 248


88% 80%

Note 1: Speed data from SKF Catalogue 4000 – 3rd Edition 1999 pg. 496-510. A later SKF catalogue 5000E dated 2003 has speeds based on ISO 15312 which are much higher and have to be substantially reduced for each application. It has been decided not to use the rating criteria in ISO 15312 since each individual application needs to be calculated, and it assumes heat is dissipated away from the bearing to the shaft. Many of the API applications have heat input to the bearing from the shaft due to hot product conducting heat to the shaft.Note 2: Tapered roller bearings are open and do not have shields or seals.Note 3: Tapered roller bearings are open and do not have shields or seals.Note 4: Pressed steel standard per SKF Catalogue 4000 – 3rd Edition 1999 pg 489.Note 5: Pressed cages are required per SP XXXX.


SKF(1)

dBrg IDmm/in.

DBrg ODmm

dm

d+D/2

mm

N/100RPM

Ndm/1000

Type of Brg

Cage Design


Grease Oil(Splash)

Grease

4) Double Row SphericalRoller Brg

Pressed Steel (4)

(2) (3) (2) (3)

API Allowable

300 200

25/.9843 52 38.5 110 85 432 32762 43.5 85 67 370 292

50/1.9685 90 70 63 50 441 350110 80 43 34 344 272

75/2.9528 130 102.5 43 34 441 349160 117.5 30 22 352 259

100/3.9370 165 132.5 28 20 371 265215 157.5 22 17 347 268

Low Avg.

353 273


85% 73%

Note 1: Speed data from SKF Catalogue 4000 – 3rd Edition 1999 pg. 448-452. A later SKF catalogue 5000E dated 2003 has speeds based on ISO 15312 which are much higher and have to be substantially reduced for each application. It has been decided not to use the rating criteria in ISO 15312 since each individual application needs to be calculated, the method is based on bearings standard clearances ( we require class C3 which has increased clearances), and it assumes heat is dissipated away from the bearing to the shaft. Many of the API applications have heat input to the bearing from the shaft due to hot product conducting heat to the shaft.Note 2: Bearing with no seals or shields or rubbing seals which do not contact the rotating component.Note 3: SKF on Pg 438 of the referenced catalogue indicates these types of bearings are available with integral rubbing seals on both sides, however the tabular speed data on pg 448-452 does not list any speeds with rubbing seals. If rubbing seals are provided, the allowable NDm should be 60% of that listed for no seals.Note 4: Pressed steel standard per SKF Catalogue 4000 – 3rd Edition 1999 pg 438.


SKF(1)

dBrg IDmm/in.

DBrg ODmm

dm

d+D/2

mm

N/100RPM(5)

Ndm/1000

Type of Brg

Cage Design


Grease Oil(Splash)

Grease

5) 2 single row angular contact ball bearings mounted B-to-B,F-to-F, or Tandum(Duplex)40 º contact angle. No preload

Machined cages.(4)(1)

(2) (3) (2) (3)

API Allowable

25/.9843 52 38.5 128 91 494 35062 43.5 107 80 465 348

50/1.9685 90 70 67 51 471 323110 80 60 46 479 368

75/2.9528 130 102.5 46 34 471 351160 117.5 40 30 478 352

100/3.9370 165 132.5 34 24 479 330215 157.5 30 20 472 320

Low Avg.

470 336


Note 1: Speed data from SKF Catalogue 4000 – 3rd Edition 1999 pg. 258-260. A later SKF catalogue 5000E dated 2003 has speeds based on ISO 15312 which are much higher and have to be substantially reduced for each application. It has been decided not to use the rating criteria in ISO 15312 since each individual application needs to be calculated, the method is based on bearings standard clearances ( we require class 3 which has increased clearances), and it assumes heat is dissipated away from the bearing to the shaft. Many of the API applications have heat input to the bearing from the shaft due to hot product conducting heat to the shaft. The 1999 Catalogue however, does not list different speeds for different cage material and configuration. Only bearings with pressed steel cages are listed for the sizes tabulated in this


table. SP requires the cages for this type of bearing to be a machined cage. The 5000E catalogue dated in 2003 does list different speeds for different cage configurations. Using the 2003 catalogue there is an approximate 7% increase in allowable speed to go from a pressed cage to a machined cage. Therefore, the allowable speeds from the 1999 catalogue for pressed steel cages were increased by 7% to account for machined cages. The 7% higher speeds are listed in the above table.Note 2: Angular contact bearing are open and do not have shields or seals.with no seals or shields. Note 3: Angular contact ball bearings are open and do not have shields or seals.Note 4: Machined cages required per SP XXXXNote 5: Per SKF 5000E 2003 catalogue pg 411, bearings mounted in pairs the reference speed provided for single bearings should be reduced by approximately 20%. The allowable speed tabulated above are generally about 20% lower than for single angular contact bearings.


SKF(1)

dBrg IDmm/in.

DBrg ODmm

dm

d+D/2

mm

N/100RPM(5)

Ndm/1000

Type of Brg

Cage Design


Grease Oil(Splash)

Grease

6) Single row angular contact ball bearing (40 º contact angle)


(2) (3) (2) (3)

API Allowable

25/.9843 52 38.5 160 107 617 42062 43.5 139 96 606 419

50/1.9685 90 70 86 64 600 449110 80 75 57 600 454

75/2.9528 130 102.5 60 46 614 472160 117.5 51 39 603 452

100/3.9370 180 140 44 32 600 449215 157.5 39 28 590 439

Low Avg.

600 440


Note 1: Speed data from SKF Catalogue 4000 – 3rd Edition 1999 pg. 252-255. A later SKF catalogue 5000E dated 2003 has speeds based on ISO 15312 which are much higher and have to be substantially reduced for each application. It has been decided not to use the rating criteria in ISO 15312 since each individual application needs to be calculated, the method is based on bearings standard clearances ( we require class 3 which has increased clearances), and it assumes heat is dissipated away from the bearing to the shaft. Many of the API applications have heat input to the bearing from the shaft due to hot product conducting heat to the shaft. The 1999 Catalogue however, does not list different speeds for different cage material and configuration. Only bearings with pressed steel cages are listed for the sizes tabulated in this table. SP requires the cages for this type of bearing to be a machined cage. The 5000E catalogue dated in 2003 does list different speeds for different cage configurations. Using the 2003 catalogue there is an approximate 7% increase in allowable speed to go from a pressed cage to a machined cage. Therefore, the allowable speeds from the 1999 catalogue for pressed


steel cages were increased by 7% to account for machined cages. The 7% higher speeds are listed in the above table.Note 2: Angular contact bearings are open and do not have shields or seals.with no seals or shields. Note 3: Angular contact ball bearings are open and do not have shields or seals.Note 4: Machined cages required per SP XXXXNote 5: Per SKF 5000E 2003 catalogue pg 411, bearings mounted in pairs the reference speed provided for single bearings should be reduced by approximately 20%. These allowable speeds are generally about 20% higher than for the duplex angular contact bearings.


SKF(1)

dBrg IDmm/in.

DBrg ODmm

dm

d+D/2

mm

N/100RPM

Ndm/1000

Type of Brg

Cage Design


Grease Oil(Splash)

Grease

7) Double row angular contact ball bearing (Two balls in the same race) (4)

Pressed Steel (1)

(2) (3) (2) (3)

API Allowable

300 220 ???

25/.9843 52 38.5 110 80 80 423 308 30862 43.5 100 75 75 435 326 326

50/1.9685 90 70 63 48 48 441 336 336110 80 53 40 40 424 328 328130 90 48 36 NA 432 324 NA

75/2.9528 130 102.5 43 32 32 441 328 328160 117.5 36 26 NA 423 306 NA

100/3.9370 180 140 30 20 NA 420 280 NA

Low Avg.

428 309 309


Note 1: Speed data from SKF Catalogue 4000 – 3rd Edition 1999 pg. 282-286. A later SKF catalogue 5000E dated 2003 has speeds based on ISO 15312 which are much higher and have to be substantially reduced for each application. It has been decided not to use the rating criteria in ISO 15312 since each individual application needs to be calculated, the method is based on bearings standard clearances ( we require class C3 which has increased clearances), and it assumes heat is dissipated away from the bearing to the shaft. Many of the API applications have heat input to the bearing from the shaft due to hot product conducting heat to the shaft. In the 1999 catalogue only bearings with pressed steel cages are listed for the sizes tabulated in this table.


Note 2: Double Row angular contact bearing with no seals or shields. Note 3: Double row angular contact ball bearings with shields or seals .Note 4: These bearings come in 24º, 25º, or 30º, contact angles however no distinction is made in the allowable speeds for the different contact angles.


NTN(1)

dBrg IDmm/in.

DBrg ODmm

dm

d+D/2

mm

N/100RPM

Ndm/1000

Type of Brg

Cage Design


Grease Oil(Splash)

Grease


Pressed Steel (4)

(2) (3) (2) (3)

API Allowable

500[API 610]

380 220

25/.9843 37 31 210 180 100 651 558 31062 43.5 140 120 81 609 522 35280 52.5 120 100 630 525

50/1.9685 65 57.2 110 96 53 629 549 303110 80 75 64 42 600 512 420130 90 67 57 513 603

75/2.9528 95 85 76 64 36 646 544 306160 117.5 50 43 29 588 505 340190 132.5 45 38 596 504

100/3.9370 125 112.5 56 48 27 630 540 304215 157.5 37 32 22 583 504 346

Low Avg.

573 510 305


87% 74% 72%

Note 1: Speed data from NTN catalogue 2202-VII/E dated 2002 pg. B10-B16. Note 2: Deep Groove ball bearings with shields or no rubbing seals. Note 3: Deep Groove ball bearings with rubbing seals .Note 4: Bearing sizes in this table all had pressed cages NTN catalogue 2202-VII/E dated 2002 pg. B-6. Pressed cages are generally used for these small size bearings. Machined cages are used for large bearings and high speeds.


NTN(1)

dBrg IDmm/in.

DBrg ODmm

dm

d+D/2

mm

N/100

RPM

Ndm/1000

Type of Brg

Cage Design


Grease Oil(Splash)

Grease


Pressed Cage (4)

(2)(5) (3) (2) (3)

API Allowable

450 380

25/.9843 47 36 152 128 547 46180 52.5 80 68 420 357

50/1.9685 80 65 88 72 572 463130 90 44 38 396 338

75/2.9528 115 95 57 49 540 464190 132.5 30 26 392 339

100/3.9370 150 125 43 37 540 460215 157.5 25 21 390 328

Low Avg.

400 341


88% 89%

Note 1: Speed data from NTN catalogue 2202-VII/E dated 2002 pg. B94-B102Note 2: Cylindrical roller bearings are open and do not have shields or seals.Note 3: Cylindrical roller bearings are open and do not have shields or seals.Note 4: NTN catalogue 2202-VII/E dated 2002 Footnote 1on pg. B-94 indicates that the limiting speeds listed in the B-94-102 tables are based on machined cages and that when pressed cages are used, 80% of the catalogue speeds should be used. The data in the above table therefore is 80% of the data on Pgs. B-94-102.Note 5: It should be noted the grease limits are approximately 85% of the oil limits.


NTN(1)

dBrg IDmm/in.

DBrg ODmm

dm

d+D/2

mm

N/100RPM

Ndm/1000

Type of Brg

Cage Design


Grease Oil(Splash)

Grease


Pressed Steel (4)

(5)

(2) (3) (2) (3)

API Allowable

300 200

25/.9843 47 36 110 79 396 28462 43.5 89 67 387 291

50/1.9685 80 65 58 44 377 286110 80 42 32 336 256

75/2.9528 105 90 43 32 387 288160 117.5 32 24 376 282

100/3.9370 140 120 32 24 384 288215 157.5 24 18 378 284

Low Avg.

369 277


81% 72%

Note 1: Speed data from NTN catalogue 2202-VII/E dated 2002 pgs. B 142-B 152.Note 2: Tapered roller bearings are open and do not have shields or seals.Note 3: Tapered roller bearings are open and do not have shields or seals.Note 4: Pressed steel standard per NTN catalogue 2202-VII/E dated 2002 pg B 134.Note 5: Pressed cages are required per SP XXXX.


NTN(1)

dBrg IDmm/in.

DBrg ODmm

dm

d+D/2

mm

N/100RPM

Ndm/1000

Type of Brg

Cage Design


Grease Oil(Splash)

Grease


Pressed Steel (4)

(2) (3) (2) (3)

API Allowable

300 200

25/.9843 52 38.5 7583 64 284320 245

50/1.9685 90 70 47 36 331 275110 80 36 23

28288 222

22275/2.9528 130 102.5 3238 24 323390 246

160 117.5 224 19 282 220100/3.9370 165 132.5 20 15 258 199

215 157.5 18 14 284 212Low Avg.

285 218214


95% 9193%

Note 1: Speed data from NTN catalogue 2202-VII/E dated 2002 pgs. B 236-238. Note 2: Double row spherical roller bearings are open and do not have shields or seals.Note 3: Double row spherical roller bearings are open and do not have shields or seals.Note 4: NTN catalogue 2202-VII/E dated 2002 Footnote 1 on pg. B-236 indicates that the limiting speeds listed in the B-236-238 tables are based on machined cages and that when pressed cages are used, 75% of the catalogue speeds should be used. The data in the above table therefore is 75% of the data on Pgs. B-236-238.


NTN(1)

dBrg IDmm/in.

DBrg ODmm

dm

d+D/2

mm

N/100RPM(5)

Ndm/1000

Type of Brg

Cage Design


Grease Oil(Splash)

Grease


Machined cages.(4)(1)(5)

(3) (2) (3)

API Allowable

450 220

25/.9843 52 33.5 130 100 435 33562 43.5 120 98 522 396

50/1.9685 90 70 73 55 511 385110 80 65 49 520 392

75/2.9528 130 102.5 49 37 502 379160 117.5 44 33 517 388

100/3.9370 180 140 36 27 504 378215 157.5 33 24 520 378

Low Avg.

488 369


Note 1: Speed data from NTN catalogue 2202-VII/E dated 2002 pgs. B 46-52Note 2: Angular contact bearings are open and do not have shields or seals.Note 3: Angular contact ball bearings are open and do not have shields or seals.Note 4: NTN catalogue 2202-VII/E dated 2002 Footnote 1 on pg. B-46 indicates that the limiting speeds listed in the B-46-52 tables are based on machined cages since machined cages


are required per SP.Note 5: Machined cages required per SP XXXX


NTN(1)

dBrg IDmm/in.

DBrg ODmm

dm

d+D/2

mm

N/100RPM(5)

Ndm/1000

Type of Brg

Cage Design


Grease Oil(Splash)

Grease



(( 2) (3) (2) (3)

API Allowable

450 300

25/.9843 52 38.5 160 120 616 46262 43.5 150 110 653 479

50/1.9685 90 70 90 67 630 469110 80 81 60 648 480

75/2.9528 130 102.5 60 45 615 461160 117.5 54 41 635 482

100/3.9370 180 140 45 34 630 476215 157.5 40 30 630 472

Low Avg.

622 466


Note 1: Speed data from NTN catalogue 2202-VII/E dated 2002 pgs. B 46-52Note 2: Angular contact bearings are open and do not have shields or seals.Note 3: Angular contact ball bearings are open and do not have shields or seals.Note 4: NTN catalogue 2202-VII/E dated 2002 Footnote 1 on pg. B-46 indicates that the limiting speeds listed in the B-46-52 tables are based on machined cages since machined cages are required per SP.Note 5: Machined cages required per SP XXXX


NTN(1)

dBrg IDmm/in.

DBrg ODmm

dm

d+D/2

mm

N/100RPM

Ndm/1000

Type of Brg

Cage Design


Grease Oil(Splash)

Grease


Pressed Steel (1)(5)

(2) (3) (2) (3)

API Allowable

300 220 ???

25/.9843 52 38.5 110 85 75 442 327 28962 43.5 100 75 63 435 326 274

50/1.9685 90 70 60 48 420 336110 80 56 43 448 344

75/2.9528 130 102.5 43 32 440 326

100/3.9370

Low Avg.

428 330 274


70% 66%

Note 1: NTN catalogue 2202-VII/E dated 2002 pgs B 74-76Note 2: Double Row angular contact bearing with no seals or shields. Note 3: Double row angular contact ball bearings with shields or seals .Note 4: These bearings come in 25º contact angles however no distinction is made in the allowable speeds for the different contact angles. NTN catalogue 2202-VII/E dated 2002 pg B-44Note 5: NTN catalogue 2202-VII/E dated 2002 pgs B 74-76 only indicate available in pressed cages.catalogue numbers are for pressed cages.


NSK(1)

dBrg IDmm/in.

DBrg ODmm

dm

d+D/2

mm

N/100RPM

Ndm/1000

Type of Brg

Cage Design


Grease Oil(Splash)

Grease


Pressed Steel (4)

(2) (3) (2) (3)

API Allowable

500[API 610]

380 ???

25/.9843 37 31 220 180 100 682 558 3162 43.5 130 110 80 565 478 348

50/1.9685 65 57.2 110 95 53 629 543 303110 80 75 60 43 600 480 344

75/2.9528 95 85 75 63 638 536160 117.5 50 43 28 588 505 329

100/3.9370 125 112.5 56 48 28 630 540 225215 157.5 34 28 22 536 441 347

Low Avg.

572 476 279


78% 80%

Note 1: Speed data from NSK catalogue E 1101 g 2003E-8 dated 1996 pg. B10-B14. Note 2: Deep Groove ball bearings with shields or no rubbing seals.with no seals or shields. Note 3: Deep Groove ball bearings with rubbing seals .shields or seals .Note 4: Bearing sizes in this table all had pressed cages NSK catalogue E 1101 g 2003E-8 dated 1996 pg. B-10-14


NSK(1)

dBrg IDmm/in.

DBrg ODmm

dm

d+D/2

mm

N/100

RPM

Ndm/1000

Type of Brg

Cage Design


Grease Oil(Splash)

Grease


Pressed Cage (4)

(2)(5) (3) (2) (3)

API Allowable

450 380

25/.9843 47 36 144 120 518 43280 52.5 88 72 462 379

50/1.9685 80 65 80 64 520 416130 90 48 40 432 360

75/2.9528 115 95 54 45 510 426190 132.5 32 27 424 361

100/3.9370 150 125 42 34 501 430215 157.5 24 21 420 364

Low Avg.

434 368


83% 83%

Note 1: Speed data from NSK catalogue E 1101 g 2003E-8 dated 1996 pg. B84-94Note 2: Cylindrical roller bearings are open and do not have shields or seals.Note 3: Cylindrical roller bearings are open and do not have shields or seals.Note 4: NSK catalogue E 1101 g 2003E-8 dated 1996 pg. B84 Footnote 1 indicates that the limiting speeds listed in the B84-94 tables are based on machined cages and that when pressed cages are used, 80% of the catalogue speeds should be used. The data in the above table therefore is 80% of the data on Pgs. B84-94.Note 5: It should be noted the grease limits are approximately 85% of the oil limits.


NSK(1)

dBrg IDmm/in.

DBrg ODmm

dm

d+D/2

mm

N/100RPM

Ndm/1000

Type of Brg

Cage Design


Grease Oil(Splash)

Grease


Pressed Steel (4)

(5)

(2) (3) (2) (3)

API Allowable

300 200

25/.9843 47 36 110 80 361 28862 43.5 80 56 348 244

50/1.9685 80 65 60 43 390 280110 80 43 32 344 256

75/2.9528 105 90 43 32 387 288160 117.5 30 22 353 259

100/3.9370 140 120 32 22 384 264215 157.5 22 16 346 252

Low Avg.

348 252


82% 79%

Note 1: Speed data from NSK catalogue E 1101 g 2003E-8 dated 1996 pg. B 116-126.Note 2: Tapered roller bearings are open and do not have shields or seals.Note 3: Tapered roller bearings are open and do not have shields or seals.Note 4: Pressed steel standard per NSK catalogue E 1101 g 2003E-8 dated 1996 pg. B 112.Note 5: Pressed cages are required per SP XXXX.


NSK(1)

dBrg IDmm/in.

DBrg ODmm

dm

d+D/2

mm

N/100RPM

Ndm/1000

Type of Brg

Cage Design


Grease Oil(Splash)

Grease

4) Double Row SphericalRoller Brg.

Pressed Steel (4)

(2) (3) (2) (3)

API Allowable

300 200

25/.9843 52 38.5 90 71 347 27362 43.5 67 53 291 231

50/1.9685 90 70 63 50 441 350110 80 48 38 384 304

75/2.9528 130 102.5 43 34 441 349160 117.5 32 26 376 306

100/3.9370 165 132.5 28 22 350 275215 157.5 24 19 378 299

Low Avg.

357 285


84% 70%

Note 1: Speed data from NSK catalogue E 1101 g 2003E-8 dated 1996 pg. B 180-184. Note 2: Double row spherical roller bearings are open and do not have shields or seals.Note 3: Double row spherical roller bearings are open and do not have shields or seals.Note 4: NSK catalogue E 1101 g 2003E-8 dated 1996 pg 179 indicates that for these size bearings the speed data on pg B-180-184 are for pressed steel cages.


Nsk(1)

dBrg IDmm/in.

DBrg ODmm

dm

d+D/2

mm

N/100RPM(5)

Ndm/1000

Type of Brg

Cage Design


Grease Oil(Splash)

Grease

5) 2 single row angular contact ball bearings mounted B-to-B,F-to-F, or Tandem(Duplex)40 º contact angle. No preload


(2) (3) (2) (3)

API Allowable

450 220

25/.9843 52 38.5 110 85 424 32762 43.5 100 75 435 326

50/1.9685 90 70 63 45 441 315110 80 56 40 448 320

75/2.9528 130 102.5 43 32 441 328160 117.5 38 28 447 329

100/3.9370 180 140 30 22 420 38215 157.5 28 20 441 315

Low Avg.

431 320


104% 69%

Note 1: Speed data from NSK catalogue E 1101 g 2003E-8 dated 1996 pg. B 52-62Note 2: Angular contact bearings are open and do not have shields or seals.with no seals or shields. Note 3: Angular contact ball bearings are open and do not have shields or seals.Note 4: NSK catalogue E 1101 g 2003E-8 dated 1996 pg. B49 indicates that the limiting speeds listed in the B-52-62 tables are based on machined cages.


Note 5: Machined cages required per SP XXXX


NSK(1)

dBrg IDmm/in.

DBrg ODmm

dm

d+D/2

mm

N/100RPM(5)

Ndm/1000

Type of Brg

Cage Design


Grease Oil(Splash)

Grease



(2) (3) (2) (3)

API Allowable

450 300

25/.9843 52 38.5 140 100 539 38562 43.5 130 90 566 392

50/1.9685 90 70 80 58 560 406110 80 67 50 536 400

75/2.9528 130 102.5 53 38 541 390160 117.5 48 34 564 400

100/3.9370 180 140 38 28 532 392215 157.5 34 24 536 378

Low Avg.

537 388


83% 77%

Note 1: Speed data from NSK catalogue E 1101 g 2003E-8 dated 1996 pg. B 52-60Note 2: Angular contact bearings are open and do not have shields or seals.with no seals or shields. Note 3: Angular contact ball bearings are open and do not have shields or seals.Note 4: NTN catalogue 2202-VII/E dated 2002 Footnote 1 on pg. B-46 indicates that the limiting speeds listed in the B-46-52 tables are based on machined cages.Note 5: Machined cages required per SP XXXX


Nsk(1)

dBrg IDmm/in.

DBrg ODmm

dm

d+D/2

mm

N/100RPM

Ndm/1000

Type of Brg

Cage Design


Grease Oil(Splash)

Grease

7) Double row angular contact ball bearing (Two balls in the same race)


(5)

(2) (3) (2) (3)

API Allowable

300 220

25/.9843 52 38.5 88 68 339 26262 43.5 80 60 348 261

50/1.9685 90 70 48 38 336 266110 80 45 34 360 272

75/2.9528 130 102.5 34 26 349 267

100/3.9370

Low Avg.

341 264


88% 83%

Note 1: Speed data from NSK catalogue E 1101 g 2003E-8 dated 1996 pg. B 66-67Note 2: Double Row angular contact bearing with no seals or shields. Note 3: Double row angular contact ball bearings with shields or seals .Note 4: NSK catalogue E 1101 g 2003E-8 dated 1996 pg. B 48 states these bearings have pressed cages.Note 5: NSK catalogue E 1101 g 2003E-8 dated 1996 pg. B49 indicates that the limiting speeds listed in the pg B 66-67 table are based on machined cages and that when pressed cages are used, 80% of the catalogue speeds should be used. The data in the above table therefore is 80% of the data on Pgs. B 66.


MRC(1)(5)

dBrg IDmm/in.

DBrg ODmm

dm

d+D/2

mm

N/100RPM

Ndm/1000

Type of Brg

Cage Design


Grease Oil(Splash)

Grease


Pressed Steel (4)

(2) (3) (2) (3)

API Allowable

500 380 ???

25/.9843 80 52.5 110 90 64 575 473 336

50/1.9685 130 90 63 52 37 567 468 333

75/2.9528 190 132.5 43 36 25 570 477 332

100/3.9370 265 182.5 31 25 18 565 456 329

Low Avg.

569 469 333


87% 81%

Note 1: Speed data from MRC catalogue M190-730 4th Edition printed in 1998 pg. B10-B14. Note 2: Deep Groove ball bearings with no seals or shields or non rubbing seals. Note 3: Deep Groove ball bearings with rubbing seals .shields or seals .Note 4: MRC catalogue M190-730 4th Edition printed in 1998 Footnote on pg 52 indicates that the above speeds are for pressed cages.Note 5: MRC bought by SKF in 1986


MRCd

Brg IDmm/in.

DBrg ODmm

dm

d+D/2

mm

N/100

RPM

Ndm/1000

Type of Brg

Cage Design


Grease Oil(Splash)

Grease


MRC catalogue M190-730 4th Edition printed in 1998 illustrates this type of bearing on Pg 18 but they do not list any data for this bearing in that catalogue.


MRCd

Brg IDmm/in.

DBrg ODmm

dm

d+D/2

mm

N/100RPM

Ndm/1000

Type of Brg

Cage Design


Grease Oil(Splash)

Grease


MRC catalogue M190-730 4th Edition printed in 1998 do not list any data for this type bearing in that catalogue.


MRC

dBrg IDmm/in.

DBrg ODmm

dm

d+D/2

mm

N/100RPM

Ndm/1000

Type of Brg

Cage Design


Grease Oil(Splash)

Grease

4) Double Row SphericalRoller Brg.

Pressed Steel (4)

MRC catalogue M190-730 4th Edition printed in 1998 do not list any data for this type bearing in that catalogue.


MRC(1)(6)

dBrg IDmm/in.

DBrg ODmm

dm

d+D/2

mm

N/100RPM(5)

Ndm/1000

Type of Brg

Cage Design


Grease Oil(Splash)

Grease



(2) (3) (2) (3)

API Allowable

25/.9843 62 43.5 100 75 435 326

50/1.9685 110 80 56 43 448 344

75/2.9528 160 117.5 38 28 447 329

100/3.9370

Low Avg.

443 333


Note 1: Speed data from MRC catalogue M190-730 4th Edition printed in 1998 bottom of pg 111.Note 2: Angular contact bearings are open and do not have shields or seals.with no seals or shields. Note 3: Angular contact ball bearings are open and do not have shields or seals.Note 4: Machined cages required per SP XXXX


Note 5: Per MRC catalogue M190-730 4th Edition printed in 1998 pg 111. Footnote 3 indicates the speed data is for pressed brass cages. On pg 109 they indicate that these bearings are available in either pressed brass or machined cages. In MRC Catalogue M230-710 “MRC Bearing Solutions for the Hydrocarbon Process Industry” on pg 26 Footnote 3 they indicate the speeds listed in that publication for these same bearings reflect machined brass cages. These speeds are the same as in the M190-730 publication which indicates pressed brass cages. Therefore it does not appear that MRC makes any speed corrections for this bearing depending on pressed or machined cages. The values listed above therefore are from MRC catalogue M190-730 4th Edition printed in 1998 bottom of pg 111.Note 6: MRC bought by SKF in 1986


MRC(1)(6)

dBrg IDmm/in.

DBrg ODmm

dm

d+D/2

mm

N/100RPM(5)

Ndm/1000

Type of Brg

Cage Design


Grease Oil(Splash)

Grease



(2) (3) (2) (3)

API Allowable

25/.9843 62 43.5 130 110 565 479

50/1.9685 110 80 70 53 560 424

75/2.9528 160 117.5 48 36 564 423

100/3.9370

Low Avg.

563 442


Note 1: Speed data from MRC catalogue M190-730 4th Edition printed in 1998 top of pg 111.Note 2: Angular contact bearings are open and do not have shields or seals.with no seals or shields. Note 3: Angular contact ball bearings are open and do not have shields or seals.Note 4: Machined cages required per SP XXXXNote 5: Per MRC catalogue M190-730 4th Edition printed in 1998 pg 1101. Footnote 3 indicates the speed data is for pressed brass cages. On pg 109 they indicate that these bearings are available in either pressed brass or machined cages. In MRC Catalogue M230-710 “MRC Bearing Solutions for the Hydrocarbon Process Industry” on pg 26 Footnote 3 they indicate the speeds listed in that publication for these same bearings reflect machined brass cages. These speeds are the same as in the M190-730 publication which indicates pressed brass cages. Therefore it does not appear that MRC makes any speed corrections for this bearing depending


on pressed or machined cages. The values listed above therefore are from MRC catalogue M190-730 4th Edition printed in 1998 top of pg 111.Note 6: MRC bought by SKF in 1986.


MRC(1)(5)

dBrg IDmm/in.

DBrg ODmm

dm

d+D/2

mm

N/100RPM

Ndm/1000

Type of Brg

Cage Design


Grease Oil(Splash)

Grease

7) Double row angular contact ball bearing (Two balls in the same race)

Pressed Steel (1)

(4)

(2) (3) (2) (3)

API Allowable

300 220

25/.9843 52 38.5 110 80 80 423 308 30862 43.5 100 75 75 435 326 326

50/1.9685 90 70 63 48 48 441 336 336110 80 53 40 40 424 328 328

75/2.9528 130 102.5 43 32 32 441 328 328160 117.5 36 26 26 423 306 306

100/3.9370 180 140 30 20 20 420 280 280215 157.5 26 18 18 410 283 283

Low Avg.

420 306 306


71% 71% 71%

Note 1: Speed data from MRC catalogue M190-730 4th Edition printed in 1998 top of pg 149-150.Note 2: Double Row angular contact bearing with no seals or shields. Note 3: Double row angular contact ball bearings with shields or seals .Note 4: MRC catalogue M190-730 4th Edition printed in 1998 footnote 2 on pg 149 & 150 indicates these speeds are for pressed cages.Note 5: MRC bought by SKF in 1986.


FAG(1)

dBrg IDmm/in.

DBrg ODmm

dm

d+D/2

mm

N/100

RPM

Ndm/1000

Type of Brg

Cage Design


Grease Oil(Splash)

Grease


Pressed Steel (4)

(2) (3) (2) (3)

API Allowable

500 [610]

380 ???

25/.9843 47 36 180 150 95 648 540 34262 43.5 140 110 75 609 479 32680 52.5 110 90 577 473

50/1.9685 80 65 100 85 53 650 553 345110 80 70 60 40 560 480 320

75/2.9528 115 95 67 56 34 509 532 323130 102.5 56 48 32 574 492 328160 117.5 48 40 564 470

100/3.9370 150 125 48 40 600 500215 157.5 36 30 567 473

Low Avg.

657 474 323


88% 80%

Note 1: Speed data from FAG catalogue WL 41510/2ed-1989 Pg 104-110. The later FAG catalogue WL 41 520/3 ed 1999 has speed data based on ISO 15312 which are much higher and have to be substantially reduced for each application. It has been decided not to use the rating criteria in ISO 15312 since each individual application needs to be calculated, the method is based on bearings standard clearances ( we require class C3 which has increased clearances), and it assumes heat is dissipated away from the bearing to the shaft. Many of the API applications have heat input to the bearing from the shaft due to hot product conducting heat to the shaft.Note 2: Bearing with shields or no rubbing seals.Note 3: Bearing with rubbing seals .Note 4: Pg 147 FAG catalogue WL 41 520/3 ed 1999 indicates that bearings w/o cage suffix in the tables have pressed steel cages. The bearings selected for the above tabulation did not


have a cage suffix and therefore have pressed steel cages.


FAG(1)

dBrg IDmm/in.

DBrg ODmm

dm

d+D/2

mm

N/100

RPM

Ndm/1000

Type of Brg

Cage Design


Grease Oil(Splash)

Grease


Pressed Cage (4)

(2) (3) (2) (3)

API Allowable

450 380

Pressed 25/.9843 47 36 170 140 612 504Resin 62 43.2 120 95 522 413Pressed 80 52.5 110 85 577 446Mach 50/1.9685 80 65 95 80 618 520Resin 90 70 80 67 560 469Pressed 130 90 53 45 477 405Resin 75/2.9528 130 102.5 53 45 543 461Pressed 190 132.5 38 32 504 424Mach 100/3.9370 150 125 48 40 600 500Resin 180 140 38 32 532 400Resin 215 157.5 32 26 504 410Mach 250 175 30 24 525 420

Low Avg.

PC(5) 519 425RC(5) 532 450MC(5) 581 480


Note 1: Speed data from FAG catalogue WL 41510/2ed-1989. The later FAG catalogue WL 41 520/3 ed 1999 has speed data based on ISO 15312 which are much higher and have to be substantially reduced for each application. It has been decided not to use the rating criteria in ISO 15312 since each individual application needs to be calculated, the method is based on bearings standard clearances ( we require class C3 which has increased clearances), and it assumes heat is dissipated away from the bearing to the shaft. Many of the API applications have heat input to the bearing from the shaft due to hot product conducting heat to the shaft.Note 2: Cylindrical roller bearings are open and do not have shields or seals.Note 3: Cylindrical roller bearings are open and do not have shields or seals.Note 4: FAG Catalogue WL 41 520/3 ed 1999 Pg 194-218 lists bearing with resin, stamped, &


machined cages. The stamped cage data was used to determine the above low average. Note 5: PC=Pressed cage RC= Resin Cage MC=Machined Cage


FAG(1)

dBrg IDmm/in.

DBrg ODmm

dm

d+D/2

mm

N/100RPM

Ndm/1000

Type of Brg

Cage Design


Grease Oil(Splash)

Grease


Pressed Steel (4)

(5)

(2) (3) (2) (3)

API Allowable

300 200

25/.9843 47 36 110 80 396 28852 38.5 110 75 385 28962 43.5 85 63 370 274

50/1.9685 80 65 56 43 364 280110 80 45 34 360 272

75/2.9528 115 90 40 30 360 270160 117.5 32 22 376 259

100/3.9370 150 125 32 22 400 275215 157.5 24 17 378 268

Low Avg.

367 268


82% 75%

Note 1: Speed data from FAG catalogue WL 41510/2ed-1989 Pg 260-268. The later FAG catalogue WL 41 520/3 ed 1999 has speed data based on ISO 15312 which are much higher and have to be substantially reduced for each application. It has been decided not to use the rating criteria in ISO 15312 since each individual application needs to be calculated, the method is based on bearings standard clearances ( we require class C3 which has increased clearances), and it assumes heat is dissipated away from the bearing to the shaft. Many of the API applications have heat input to the bearing from the shaft due to hot product conducting heat to the shaft.Note 2: Tapered roller bearings are open and do not have shields or seals.Note 3: Tapered roller bearings are open and do not have shields or seals.Note 4: Pressed steel standard FAG catalogue WL 41 520/3 ed 1999 pg 257Note 5: Pressed cages are required per SP XXXX.


FAG(1)

dBrg IDmm/in.

DBrg ODmm

dm

d+D/2

mm

N/100RPM

Ndm/1000

Type of Brg

Cage Design


Grease Oil(Splash)

Grease


Pressed Steel (4)

(2) (3) (2) (3)

API Allowable

300 200

RC 25/.9843 52 38.5 120 90 462 347RC 62 43.5 90 70 392 305RC or MC

50/1.9685 90 70 67 53 469 371

RC or MC

110 80 43 34 344 272

RC 75/2.9528 130 102.5 43 34 441 349RC or MC

160 117.5 30 22 353 259

RC or MC

100/3.9370 165 132.5 30 22 398 292

RC or MC

215 157.5 22 17 347 268

Low Avg.

359 276

75% of Low

Avg (6)

269 207


83% 72%

Note 1: Speed data from FAG catalogue WL 41510/2ed-1989 pg. 322-334. The later FAG catalogue WL 41 520/3 ed 1999 has speed data based on ISO 15312 which are much higher and have to be substantially reduced for each application. It has been decided not to use the rating criteria in ISO 15312 since each individual application needs to be calculated, the method is based on bearings standard clearances ( we require class C3 which has increased clearances), and it assumes heat is dissipated away from the bearing to the shaft. Many of the API applications have heat input to the bearing


from the shaft due to hot product conducting heat to the shaft.Note 2: Double row spherical roller bearings are open and do not have shields or seals.Note 3: Double row spherical roller bearings are open and do not have shields or seals.Note 4: FAG catalogue WL 41 520/3 ed 1999 pg 318 lists the types of cages. Four of the 25mm bore bearings were resin. The 50, 75, 100 mm bores bearings were available in both resin & machined cages. Both resin and machine cages were rated at the same speed. None of these bearings were available in pressed cages. Note 5: RC = Resin Cage MC = Machined cageNote 6: NTN catalogue for these bearings indicated that their catalogue ratings were for machined cages and that if pressed cages were used the machined cage speeds should be reduced by 25%. Ie. Use 75% of the machined cage speeds. Therefore, the low average numbers above have been reduced by 25% to reflect pressed cages since these is no information in the catalogue for this size bearing with pressed cages. These 75% numbers for pressed cages are included in the summary chart at the end of this Annex.


FAG(1)

dBrg IDmm/in.

DBrg ODmm

dm

d+D/2

mm

N/100RPM(5)

Ndm/1000

Type of Brg

Cage Design Oil(Bath)Lower race in oil

Grease Oil(Splash)

Grease


Machined cages.(4)(1)(5)(6)

(2) (3) (2) (3)

API Allowable

450 220

Resin 25/.9843 52 38.5 138 88 531 339Resin 62 43.5 112 76 487 331Resin 50/1.9685 90 70 64 48 448 336Resin 110 80 56 42 448 336Resin 75/2.9528 130 102.5 42 32 431 328Resin 160 117.5 36 27 423 317Resin 100/3.9370 180 140 30.4 22 426 307Resin 215 157.5 29 21 457 331

Low Avg.

446 323


Note 1: Speed data from FAG catalogue WL 41510/2ed-1989 pg. 135-138 . The later FAG catalogue WL 41 520/3 ed 1999 has speed data based on ISO 15312 which are much higher and have to be substantially reduced for each application. It has been decided not to use the rating criteria in ISO 15312 since each individual application needs to be calculated, the method is based on bearings standard clearances ( we require class C3 which has increased


clearances), and it assumes heat is dissipated away from the bearing to the shaft. Many of the API applications have heat input to the bearing from the shaft due to hot product conducting heat to the shaft.Note 2: Angular contact bearing with no seals or shields. Note 3: Angular contact ball bearings are open and do not have shields or seals.Note 4: The data in the FAG catalogue only lists speeds for single angular contact ball bearings. The table on pg. 130 of the referenced catalogue states to use 80% of the speed listed for single bearings when pared mounting or tandem mounting arrangements are used. Therefore 80% of the individual speeds listed on pg. 135-138 were used in the above table. Note 5: Machined cages required per SP XXXXNote 6: Page 130 of the referenced catalogue lists cage types for this bearing. Most FAG angular contact bearings are fitted with resin cages standardly. The large bearings (i.e. greater than 140 mm bore have machined cages.


FAG(1)

dBrg IDmm/in.

DBrg ODmm

dm

d+D/2

mm

N/100RPM(5)

Ndm/1000

Type of Brg

Cage Design


Grease Oil(Splash)

Grease



(2) (3) (2) (3)

API Allowable

450 300

Resin 25/.9843 52 38.5 138 88 531 339Resin 62 43.5 112 76 487 331Resin 50/1.9685 90 70 64 48 448 336Resin 110 80 56 42 448 336Resin 75/2.9528 130 102.5 42 32 431 328Resin 160 117.5 36 27 423 317Resin 100/3.9370 180 140 30.4 22 426 308Resin 215 157.5 29 21 457 331

Low Avg.

446 323


Note 1: Speed data from FAG catalogue WL 41510/2ed-1989 pg. 135-138 . The later FAG catalogue WL 41 520/3 ed 1999 has speed data based on ISO 15312 which are much higher and have to be substantially reduced for each application. It has been decided not to use the rating criteria in ISO 15312 since each individual application needs to be calculated, the method is based on bearings standard clearances ( we require class C3 which has increased clearances), and it assumes heat is dissipated away from the bearing to the shaft. Many of the API applications have heat input to the bearing from the shaft due to hot product conducting heat to the shaft.Note 2: Angular contact bearing with no seals or shields. Note 3: Angular contact ball bearings are open and do not have shields or seals.Note 4: Page 130 of the referenced catalogue lists cage types for this bearing. Most FAG angular contact bearings are fitted with resin cages standardly. The large bearings (i.e. greater than 140 mm bore have machined cages. Note 5: Machined cages required per SP XXXX


FAG(1)

dBrg IDmm/in.

DBrg ODmm

dm

d+D/2

mm

N/100RPM

Ndm/1000

Type of Brg

Cage Design


Grease Oil(Splash)

Grease



(2) (3) (2) (3)

API Allowable

300 220 220 X .66 = 145(3)

Resin 25/.9843 52 38.5 120 85 462 327Resin 62 43.5 100 75 435 326Resin 50/1.9685 90 70 63 48 441 336Resin 110 80 53 40 424 320Resin 75/2.9528 130 102.5 43 32 441 328Pressed (5) 160 117.5 38 28 447 329Pressed(5) 100/3.9370 180 140 32 22 448 308Machined(5) 215 158 30 20 474 316

Low Avg.

437 320


68% 69%

Note 1: Speed data from FAG catalogue WL 41510/2ed-1989 pg. 158-160 . The later FAG catalogue WL 41 520/3 ed 1999 has speed data based on ISO 15312 which are much higher and have to be substantially reduced for each application. It has been decided not to use the rating criteria in ISO 15312 since each individual application needs to be calculated, the method is based on bearings standard clearances ( we require class C3 which has increased clearances), and it assumes heat is dissipated away from the bearing to the shaft. Many of the API applications have heat input to the bearing from the shaft due to hot product conducting heat to the shaft.Note 2: Double Row angular contact bearing with no seals or shields.


Note 3: In the 1989 cataligue no data is preented for bearing with seals or shields. In the 3rd Edition (2000 ) of the FAG catalogue, information on sealed or shielded bearings is presented. Bearing with seals are shields are rated at 63% of those w/o seals or shields. Note 4: These bearings come in 25º , 35º, 45º contact angles however no distinction is made in the allowable speeds for the different contact angles. Only bearings with out filling slots have 25º contact. Filling slots are not allowed per SP.Note 5: These bearings have filling slots or split inner rings which are not in accordance with SP requirement.


Summary TableType Brg Ndm /1000 (API Allowable as % Mfg Allowable)

Manufacturer Oil Grease1) Single Row Deep

Groove Ball Brg(Pressed Cages)

No seals or shields

Bearing with Seals

API (Allowable) 500(1)380(2) 230(3)

SKF 570 (88%) 474 (80%) 340(67%)FAG 567 (91%) 474(80%) 323(71%)MRC 569 (88%) 469(81%) 333(70%)NSK 572 (87%) 476(80%) 279(82%)NTN 573 (87%) 510(75%) 305(75%)

Average 480 31680% of average 380 25385% of lowest Mfg number

398 237

Note 1: 500 limit determined by API 610 ExperienceNote 2: 380 is the lower of 80% of the average or 85% of the lowest Mfg. numberNote 3: 230 is based on 60% of the speed limit for no shields. This is a typical number obtained from analyzing the manufacturer’s catalogs. It is also close to 85% of the lowest Mfg number.

2) Single Row Cylindrical Roller(Pressed Cages)

Manufacturer Oil Grease(4)

API (Allowable) 340(5) 290(6)

SKF 488 402

FAG 519 425MRCNSK 434 368NTN 400 341


340 290

Note 4: Single row cylindrical roller bearings are open and do not come with shields or seals. Note 5: 340 is the lower of 80% of the average or 85% of the lowest Mfg. numberNote 6: 290 is the lower of 80% of the average or 85% of the lowest Mfg. number


3) Single Row Tapered Roller(Pressed Cgs)(10)


API (Allowable) 290(8) 210(9)

SKF 341 248

FAG 367 268 MRCNSK 348 252NTN 369 277


290 210

Note 7: Single row tapered roller bearings are open and do not come with shields or seals.Note 8: 290 is approximately the same as 80% of the average or 85% of the lowest Mfg. No.Note 9: 210 is the same as 80% of the average or 85% of the lowest Mfg. NoNote 10: Pressed cages are required per SP.

4) Double Row Spherical Roller(Pressed Cages)


API (Allowable) 230(12) 175(13)

SKF 353 273

FAG 269 207 MRCNSK 357 285NTN 285 214


228 176

Note 11: Double row spherical roller bearings are open and do not come with shields or seals.Note 12: 230 is approximately 228 which is the lower of 80% of the average or 85% of the lowest manufacturer’s number.Note 13: 175 is approximately 176 which is the lower of 80% of the average or 85% of the lowest manufacturer’s number.


5) 2 Single row Angular Contact

Ball Brgs mounted Back-to Back,

Face-to-Face, orTandem. (Duplex)40 º contact angle.

No preload(Machined Cages)(14)


API (Allowable) 360(15)(16.1)270(16) (16.1)

SKF 470 336

FAG (17.1) 446 323MRC 443 333NSK 431 320NTN 488 369


366 272

Note 14: Machined cages required per SPNote 15: 360 is approximately 354 which is the lower of 80% of the average or 85% of the lowest manufacturer’s number.Note 16: 270 is approximately 261 which is the lower of 80% of the average or 85% of the lowest manufacturer’s number.Note 16.1 : As a check, these numbers are also approximately 80% of the single row angular contact bearings(Item 7 below) as several manufacturers recommend. Note 17: Single row Angular Contact Ball Bearings mounted Back-to Back, Face-to-Face, or Tandem are open and do not come with shields or seals.Note 17.1: FAG catalogue information only lists Resin cages for bearings less than 100mm ID. I could not find a any information correlating resin ages and Machined cages. Will use the information for resin cages since it appears to fall in line with the other manufacturers who have machine cages for this type bearing.



6) Single row Angular Contact

Ball Bearing(Machined Cages)

(17.2)

API (Allowable) 450(18) 330(19)

SKF 600 440

FAG (17.3) 560 406MRC 563 442NSK 537 388NTN 622 466


456 330

Note 17.2: Machined cages required per SP.Note 17.3: FAG catalogue information only lists Resin cages for bearings less than 100mm ID. I could not find a any information correlating resin ages and Machined cages. Will use the information for resin cages since it appears to fall in line with the other manufacturers who have machine cages for this type bearing. Note 18: 450 is the lower of 80% of the average or 85% of the lowest manufacturer’s number.Note 19: 330 is approximately 318 which is the lower of 80% of the average or 85% of the lowest manufacturer’s number.Note 20: Single row angular contact ball Brgs. are open and do not come with shields or seals.

7) Double Row (2 balls in same race)

Deep Groove Angular Contact

Ball bearing(Pressed Cages)

Manufacturer Oil Grease

API (Allowable) 290(21)

No seals or shields

225(22)

Seals

145(23)

SKF 428 309 309??FAG 437 320 145MRC 420 306 306??NSK 341 264NTN 428 330 274??

Average 410 30680% of average 328 24485% of lowest Mfg 290 224


numberNote 21: 290 is the lower of 80% of the average or 85% of the lowest manufacturer’s number.Note 22: 220 is approximately 223 which is the lower of 80% of the average or 85% of the lowest manufacturer’s number.Note 23: 145 is 60% of 225 which is the bearing limit w/o shields. Tis is a typical reduction when analyzing bearing mfg. catalogs

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