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Load Rating Data

The load rating table below is to be used as a general tool for determining how loads and speeds imposed on a bearing will affect the overall life of the bearing. By determining your expected radial load and speech, you can figure out the L10 life that will be suitable for your application.

Note: L10 hours are the number of service hours a bearing can be operated before 10% of the bearings fail. This means that the AVERAGE service life of a bearing (50% failure rate) will be higher than those listed below.

Note: Decreasing bearing loads will have an exponential effect of the fatigue life of a bearing.

The data below is based on radial load capacity for given life/speed (lbs.)

Insert Number L10 Life (HRS) 50 RPM 150 RPM 250 RPM 500 RPM 750 RPM 1000 RPM 1500 RPM 1750 RPM 2000 RPM 2500 RPM 3000 RPM 3500 RPM 4000 RPM 4500 RPM
SUC 204 5000 945 655 553 439 383 348 304 289 276 257 241 229 219 211
SHC 204 10000 750 520 439 348 304 276 241 229 219 204 192 182 174 167
SUE 204 30000 520 361 304 241 211 192 167 159 152 141 133 126 121 116
SSER 204 50000 439 304 257 204 178 162 141 134 128 119 112 106 102 98
SUER 204 100000 348 241 204 162 141 128 112 106 102 95 89 84 81 78
SUC 205 5000 1031 715 603 478 418 380 332 315 301 280 263 250 239 X
SHC 205 10000 818 567 478 380 332 301 263 250 239 222 209 199 190 X
SUE 205 30000 567 393 332 263 230 209 183 173 166 154 145 138 132 X
SSER 205 50000 478 332 280 222 194 176 154 146 140 130 122 116 111 X
SUER 205 100000 380 263 222 176 154 140 122 116 111 103 97 92 88 X
SUC 206 5000 1441 999 843 669 584 531 464 441 421 391 368 350 X X
SHC 206 1000 1144 793 669 531 464 421 368 350 334 310 292 278 X X
SUE 206 30000 793 550 464 368 322 292 255 242 232 215 203 192 X X
SSER 206 50000 669 464 391 310 271 246 215 204 196 182 171 162 X X
SUER 206 100000 531 368 310 246 215 196 171 162 155 144 136 129 X X
SUC 207 5000 1899 1317 1110 881 770 700 611 581 555 515 485 X X X
SHC 207 10000 1507 1045 881 700 611 555 485 461 441 409 385 X X X
SUE 207 30000 1045 725 611 485 424 385 336 319 306 284 267 X X X
SSER 207 50000 881 611 515 409 357 325 284 269 258 239 225 X X X
SUER 207 100000 700 485 409 325 284 258 225 214 205 190 179 X X X
SUC 208 5000 2147 1488 1255 996 870 791 691 656 628 583 X X X X
SHC 208 10000 1704 1181 996 791 691 628 548 521 498 462 X X X X
SUE 208 30000 1181 819 691 548 479 435 380 361 345 321 X X X X
SSER 208 50000 996 691 583 462 404 367 321 305 291 270 X X X X
SUER 208 100000 791 548 462 367 321 291 255 242 231 215 X X X X
SUC 209 5000 2402 1665 1404 1115 974 885 773 734 702 652 X X X X
SHC 209 10000 1906 1322 1115 885 773 702 613 583 557 517 X X X X
SUE 209 30000 1322 916 773 613 536 487 425 404 386 359 X X X X
SSER 209 50000 1115 773 652 517 452 411 359 341 326 303 X X X X
SUER 209 100000 885 613 517 411 359 326 285 270 259 240 X X X X
SUC 210 5000 2596 1800 1518 1205 1053 956 835 794 759 X X X X X
SHC 210 10000 2060 1429 1205 956 835 759 663 360 602 X X X X X
SUE 210 30000 1429 991 835 663 579 526 460 437 418 X X X X X
SSER 210 50000 1205 835 705 559 489 444 388 368 352 X X X X X
SUER 210 100000 956 663 559 444 388 352 308 292 280 X X X X X
SUC 211 5000 3216 2230 1881 1493 1304 1185 1035 983 940 X X X X X
SHC 211 10000 2552 1770 1493 1185 1035 940 821 780 746 X X X X X
SUE 211 30000 1770 1227 1035 821 718 652 570 541 517 X X X X X
SSER 211 50000 1493 1035 873 693 605 550 480 456 436 X X X X X
SUER 211 100000 1185 821 693 550 480 436 381 362 346 X X X X X
SUC 212 5000 3874 2686 2266 1798 1571 1427 1247 1184 X X X X X X
SHC 212 10000 3075 2132 1798 1427 1247 1133 990 940 X X X X X X
SUE 212 30000 2132 1478 1247 990 864 785 686 652 X X X X X X
SSER 212 50000 1798 1247 1052 835 729 662 579 550 X X X X X X
SUER 212 100000 1427 990 835 662 579 526 459 436 X X X X X X
X = Past limiting speed for standard seal bearings

Bearing Fatigue Life

BEARING LIFE INFORMATION:

Fatigue
If a bearing is correctly mounted, lubricated, sealed from contaminants, installed properly, and handled accordingly, the only only other thing that can cause failure is fatigue of the material. Metal fatigue is the progressive and localized structural damage that occurs when a material is subjected to cyclic loadings.
Bearing Fatigue Life
The life of a bearing is defined as the hours of operation (at a constant speed) that the bearing is capable of running before evidence of fatigue develops in the material of the raceways or in the rolling elements of the bearing.

Calculating Bearing Life:

L10 is the number of hours (at a constant speed) that a group of bearings will run before 10% of the bearings fail.

Bearing life formula :


Note: The above formula assumes that the bearings are being ran in ideal operating conditions (including press-fit). Considering that typical mounted bearing applications have a flip fit, a derating factor multiplier should be used to calculate L10 life.
- For set screw and eccentric collar bearings, a multiplier of 0.456 should be used.
- For tru-loc bearings, a multiplier of 0.800 should be used.

Certain applications require different L10 life conditions. An application that is NOT used frequently will require lower L10 life hours to give sufficient performance than an application that IS frequently used and requires higher reliability.

L10 Life Chart
The data below is the Cr/P Factor for the stated RPM
Machinery Used L10 Life (HRS) 50 RPM 100 RPM 200 RPM 300 RPM 400 RPM 500 RPM 600 RPM 700 RPM 800 RPM 900 RPM 1000 RPM 1200 RPM 1500 RPM 1800 RPM 2400 RPM 3600 RPM 5000 RPM 10000 RPM
Household Appliances
1,000-2,000 hrs
1,000 1.4 1.8 2.3 2.6 2.9 3.1 3.3 3.5 3.6 3.8 3.9 4.2 4.5 4.8 5.2 6.0 6.7 8.4
Household Appliances
1,000-2,000 hrs
2,000 1.8 2.3 2.9 3.3 3.6 3.9 4.2 4.4 4.6 4.8 4.9 5.2 5.6 6.0 6.6 7.6 8.4 10.6
Agricultural Machinery
3,000-8,000 hrs
3,000 2.1 2.6 3.3 3.8 4.2 4.5 4.8 5.0 5.2 5.5 5.6 6.0 6.5 6.9 7.6 8.7 9.7 12.2
Agricultural Machinery
3,000-8,000 hrs
5,000 2.5 3.1 3.9 4.5 4.9 5.3 5.6 5.9 6.2 6.5 6.7 7.1 7.7 8.1 9.0 10.3 11.4 14.4
Agricultural Machinery
3,000-8,000 hrs
8,000 2.9 3.6 4.6 5.2 5.8 6.2 6.6 7.0 7.3 7.6 7.8 8.3 9.0 9.5 10.5 12.0 13.4 16.9
Small Motors / Fans
8,000-15,000 hrs
8,766
(1 yr)
3.0 3.7 4.7 5.4 5.9 6.4 6.8 7.2 7.5 7.8 8.1 8.6 9.2 9.8 10.8 12.4 13.8 17.4
Small Motors / Fans
8,000-15,000 hrs
12,000 3.3 4.2 5.2 6.0 6.6 7.1 7.6 8.0 8.3 8.7 9.0 9.5 10.3 10.9 12.0 13.7 15.3 19.3
Small Motors / Fans
8,000-15,000 hrs
15,000 3.6 4.5 5.6 6.5 7.1 7.7 8.1 8.6 9.0 9.3 9.7 10.3 11.1 11.7 12.9 14.8 16.5 20.8
General Industrial Machinery
20,000-40,000 hrs
20,000 3.9 4.9 6.2 7.1 7.8 8.4 9.0 9.4 9.9 10.3 10.6 11.3 12.2 12.9 14.2 16.3 18.2 22.9
General Industrial Machinery
20,000-40,000 hrs
25,000 4.2 5.3 6.7 7.7 8.4 9.1 9.7 10.2 10.6 11.1 11.4 12.2 13.1 13.9 15.3 17.5 19.6 24.7
General Industrial Machinery
20,000-40,000 hrs
30,000 4.5 5.6 7.1 8.1 9.0 9.7 10.3 10.8 11.3 11.7 12.2 12.9 13.9 14.8 16.3 18.6 20.8 26.2
General Industrial Machinery
20,000-40,000 hrs
35,000 4.7 5.9 7.5 8.6 9.4 10.2 10.8 11.4 11.9 12.4 12.8 13.6 14.7 15.6 17.1 19.6 21.9 27.6
General Industrial Machinery
20,000-40,000 hrs
40,000 4.9 6.2 7.8 9.0 9.9 10.6 11.3 11.9 12.4 12.9 13.4 14.2 15.3 16.3 17.9 20.5 22.9 28.8
Large Motors / Fans / Pumps
40,000-60,000 hrs
43,830
(5 yrs)
5.1 6.4 8.1 9.2 10.2 11.0 11.6 12.3 12.8 13.3 13.8 14.7 15.8 16.8 18.5 21.2 23.6 29.7
Large Motors / Fans / Pumps
40,000-60,000 hrs
50,000 5.3 6.7 8.4 9.7 10.6 11.4 12.2 12.8 13.4 13.9 14.4 15.3 16.5 17.5 19.3 22.1 24.7 31.1
Large Motors / Fans / Pumps
40,000-60,000 hrs
60,000 5.6 7.1 9.0 10.3 11.3 12.2 12.9 13.6 14.2 14.8 15.3 16.3 17.5 18.6 20.5 23.5 26.2 33.0
Extremely Reliable Equipment
100,000-200,000 hrs
100,000 6.7 8.4 10.6 12.2 13.4 14.4 15.3 16.1 16.9 17.5 18.2 19.3 20.8 22.1 24.3 27.8 31.1 39.1
Extremely Reliable Equipment
100,000-200,000 hrs
150,000 7.7 9.7 12.2 13.9 15.3 16.5 17.5 18.5 19.3 20.1 20.8 22.1 23.8 25.3 27.8 31.9 35.6 44.8
Extremely Reliable Equipment
100,000-200,000 hrs
200,000 8.4 10.6 13.4 15.3 16.9 18.2 19.3 20.3 21.3 22.1 22.9 24.3 26.2 27.8 30.7 35.1 39.1 49.3


Limiting Speed
The limiting speed of a bearing is greatly affected by the fit between the bearing bore and shaft. The values listed in the Limiting Speed Table below are based on ideal mounting conditions, which would include a press fit between the bearing and the shaft. For normal mounting conditions, like the shaft tolerances listed below, the listed maximum speed can be reduced by up to 25%. If your shaft does not fall into the listed tolerances, your maximum speed may be significantly lower than the listed speeds.

Shaft Dia. (in.)
Shaft Tolerance (in.)
1/2" - 5/8" +0 / -0.0007
3/4" - 1-1/8" +0 / -0.0008
1-3/16" - 1-15/16" +0 / -0.0010
2" - 3-1/8" +0 / -0.0012

Shaft Dia. (mm.)
Shaft Tolerance (mm.)
10 - 18 +0 / -0.018
19 - 30 +0 / -0.021
31-50 +0 / -0.025
51-80 +0 / -0.030

Limiting Speed Table
Insert Number
Standard Seal
L3 Seal
SUC 204, SHC 204,SUE 204,SSER 204, SUER 204 4800 RPM 680 RPM
SUC 205, SHC 205,SUE 205,SSER 205, SUER 205 4480 RPM 600 RPM
SUC 206, SHC 206,SUE 206,SSER 206, SUER 206 3600 RPM 480 RPM
SUC 207, SHC 207,SUE 207,SSER 207, SUER 207 3200 RPM 400 RPM
SUC 208, SHC 208,SUE 208,SSER 208, SUER 208 2880 RPM 380 RPM
SUC 209, SHC 209,SUE 209,SSER 209, SUER 209 2560 RPM 340 RPM
SUC 210, SHC 210,SUE 210,SSER 210, SUER 210 2400 RPM 320 RPM
SUC 211, SHC 211,SUE 211,SSER 211, SUER 211 2040 RPM 280 RPM
SUC 212, SHC 212,SUE 212,SSER 212, SUER 212 1820 RPM 240 RPM

Troubleshooting Guide
Symptom
Probable Cause
Corrective Action
Overheating Over Lubrication Use less lubricant
Overheating No Lubrication Add lubricant
Overheating First run after relubrication Stop system to let it cool then restart
Overheating Misalignment Properly align bearings
Overheating Excessive load Select a bearing with adequate load capacity Decrease load on the bearing
Overheating Excessive speeds Select a bearing with adequate speed rating Decrease shaft speed
Overheating Ambient heat Move bearing away from heat sources
Noise: High Pitch Misalignment Properly align bearings
Noise: Low Pitch Dented raceways Replace bearing. Use proper installation methods
Noise: Rattle or Chatter Improper shaft fit Use proper shaft size Use proper bearing size
Noise: Rattle or Chatter Contaminated bearing Purge with grease or Replace bearing
Noise: Rattle or Chatter Loose parts Check machinery for loose bolts
Vibration Out of balance components Balance all machine parts
Vibration Loose parts Check machinery for loose bolts
Vibration Improper shaft fit Use proper shaft size or Use proper bearing size
Vibration Bent shaft Replace or straighten the shaft
Vibration Dented raceways Replace bearing. Use proper installation methods
Binding Shaft Bent shaft Replace or straighten the shaft
Binding Shaft Contaminated bearing Purge with grease or replace bearings
Binding Shaft misalignment Properly align bearings
Binding Shaft Interference Check clearance of rotating parts
Shaft Wear Improper shaft fit Use proper shaft or bearing size
Shaft Wear Improper shaft finish Repair or replace the shaft


If you have any additional questions or concerns, or if you need additional info about your specific application, please don't hesitate to contact us. One of our consultants will be happy to assist you in any way that we can!