NTN - Large Bearings

Single Row Tapered Roller Bearings
Sa
Sb
Da
db
r1a
ra
da
Db
Equivalent bearing load
dynamic
PrXFrYFa
Fa Fa
e
Fr Fr e
X Y X Y
1 0 0.4 Y2
static
Por0.5FrYoFa
When PorFr use PorFr
For values of e, Y2 and Yo
see the table below.
Abutment and fillet dimensions Load Constant Axial Mass
center
load factors
mm mm kg
d a d b D a D b S a S b r as r 1as
min max max min min min min max max a e Y 2 Y o (approx.)
254 254 308 290 311 10 12 2.5 2 65.5 0.46 1.31 0.72 10.9
258 261 346 318 346 12 19 3 2.5 78 0.46 1.31 0.72 26.8
258 290 422 368 408 3.9 19 3 3 91 0.49 1.23 0.68 47.7
258 277.5 422 365 421.5 4.1 27 3 3 107 0.43 1.39 0.77 78.8
262 301 478 417 456 8.1 25 4 4 94 0.37 1.60 0.88 87.2
262 291 478 402 467 1.5 33 4 4 120.5 0.37 1.60 0.88 141.9
274 279 348 325 347 11 15 2.5 2 69.5 0.41 1.48 0.81 18.8
282 287 382 352 383 14 22 4 3 85.5 0.43 1.38 0.76 39.4
282 312 458 396 438.5 4.2 22 4 4 99.5 0.49 1.23 0.68 63.4
282 302 458 385 453 2.9 31 4 4 121.5 0.49 1.23 0.68 103.6
294 298 368 344 368 11 15 2.5 2 75 0.43 1.39 0.76 20
302 305 402 370 402 14 22 4 3 90.5 0.46 1.31 0.72 41.8
302 331 478 422 464.5 5.9 22 4 4 102 0.49 1.23 0.68 66.6
302 318 478 405 473 6.4 31 4 4 123.5 0.49 1.23 0.68 110
308 340.5 552 469.5 540.5 3.4 42 5 5 137.5 0.37 1.60 0.88 222
318 324 406 379 405 13 19 3 2.5 80 0.39 1.52 0.84 31.4
322 329 442 404 439 15 26 4 3 98 0.43 1.38 0.76 57.2
322 356 518 453 498 4.9 25 4 4 111 0.49 1.23 0.68 84.3
322 345 518 438 511.5 2.6 34 4 4 135.5 0.49 1.23 0.68 138.7
338 344 426 398 426 13 19 3 2.5 85 0.42 1.44 0.79 33.1
338 344 426 398 425 13 13 3 2.5 85 0.39 1.55 0.85 33.2
342 344.5 462 418.5 463 15 26 4 3 104 0.46 1.31 0.72 60.2
342 379 558 485 531.5 4.7 29 4 4 118.5 0.47 1.27 0.70 103.9
342 369 558 473 551 3.9 34 4 4 142 0.47 1.27 0.70 172.1
358 362 446 417 446 13 19 3 2.5 90.5 0.44 1.37 0.75 34.9
358 362 446 414 445.5 13 13 3 2.5 87 0.39 1.55 0.85 36
362 374 498 452 496 3.5 22 4 4 103.5 0.37 1.60 0.88 78.7
378 381 466 436 466 13 19 3 2.5 96.5 0.46 1.31 0.72 36.6
382 393.5 518 476 519 5.5 22 4 4 106 0.37 1.60 0.88 83.7
398 408 502 464.5 503 4 15 3 3 101 0.40 1.49 0.82 51.3
402 412.5 538 495 539 6.5 22 4 4 109.5 0.37 1.60 0.88 89.3
B-103