Machinery's Handbook, 31st Edition
Ball and Roller Bearings 2495 This formula applies to thrust ball bearings with a cross sectional raceway radius not larger than 0.54 D . The load-carrying ability of a bearing is not necessarily increased by use of a smaller radius, but is reduced by use of a larger radius. Roller Bearing Static Load Rating: For roller bearings suitably manufactured from hardened alloy steels, the static radial load rating is that uniformly distributed static radial bearing load which produces a maximum contact stress of 4,000 megapascals (580,000 pounds per square inch) acting at the center of contact of the most heavily loaded rolling element. The static axial load rating is that uniformly distributed static centric axial load which produces a maximum contact stress of 4,000 megapascals (580,000 pounds per square inch) acting at the center of contact of each rolling element. Table 35. f o for Calculating Static Load Rating for Ball Bearings cos d D m α Radial and Angular Contact Groove Type Radial Self-Aligning Thrust Metric a Inch b Metric a Inch b Metric a Inch b 0.00 12.7 1850 1.3 187 51.9 7730 0.01 13.0 1880 1.3 191 52.6 7620 0.02 13.2 1920 1.3 195 51.7 7500 0.03 13.5 1960 1.4 198 50.9 7380 0.04 13.7 1990 1.4 202 50.2 7280 0.05 14.0 2030 1.4 206 49.6 7190 0.06 14.3 2070 1.5 210 48.9 7090 0.07 14.5 2100 1.5 214 48.3 7000 0.08 14.7 2140 1.5 218 47.6 6900 0.09 14.5 2110 1.5 222 46.9 6800 0.10 14.3 2080 1.6 226 46.4 6730 0.11 14.1 2050 1.6 231 45.9 6660 0.12 13.9 2020 1.6 235 45.5 6590 0.13 13.6 1980 1.7 239 44.7 6480 0.14 13.4 1950 1.7 243 44.0 6380 0.15 13.2 1920 1.7 247 43.3 6280 0.16 13.0 1890 1.7 252 42.6 6180 0.17 12.7 1850 1.8 256 41.9 6070 0.18 12.5 1820 1.8 261 41.2 5970 0.19 12.3 1790 1.8 265 40.4 5860 0.20 12.1 1760 1.9 269 39.7 5760 0.21 11.9 1730 1.9 274 39.0 5650 0.22 11.6 1690 1.9 278 38.3 5550 0.23 11.4 1660 2.0 283 37.5 5440 0.24 11.2 1630 2.0 288 37.0 5360 0.25 11.0 1600 2.0 293 36.4 5280 0.26 10.8 1570 2.1 297 35.8 5190 0.27 10.6 1540 2.1 302 35.0 5080 0.28 10.4 1510 2.1 307 34.4 4980 0.29 10.3 1490 2.1 311 33.7 4890 0.30 10.1 1460 2.2 316 33.2 4810 0.31 9.9 1440 2.2 321 32.7 4740 0.32 9.7 1410 2.3 326 32.0 4640 0.33 9.5 1380 2.3 331 31.2 4530 0.34 9.3 1350 2.3 336 30.5 4420 0.35 9.1 1320 2.4 341 30.0 4350 0.36 8.9 1290 2.4 346 29.5 4270 0.37 8.7 1260 2.4 351 28.8 4170 0.38 8.5 1240 2.5 356 28.0 4060 0.39 8.3 1210 2.5 361 27.2 3950 0.40 8.1 1180 2.5 367 26.8 3880 0.41 8.0 1160 2.6 372 26.2 3800 0.42 7.8 1130 2.6 377 25.7 3720 0.43 7.6 1100 2.6 383 25.1 3640 0.44 7.4 1080 2.7 388 24.6 3560 0.45 7.2 1050 2.7 393 24.0 3480
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