NTN - Large Bearings

Double Row Tapered Roller Bearings (Outside Direction)
Db
r1a
ra
da
Equivalent bearing load
dynamic
PrXFrYFa
Fa
Fr
e
Fa
e Fr
X Y X Y
1 Y1 0.67 Y2
static
PorFrYoFa
For values of e, Y2 and Yo
see the table below.
Abutment and fillet dimensions Load
center
Constant Axial load factors Mass
mm mm kg
d a D b r as r las
min max max max a e Y 1 Y 2 Y o (approx.)
275 358 6.4 1.5 186.5 0.52 1.31 1.95 1.28 64
274 337 6.4 1.5 132.5 0.36 1.85 2.76 1.81 39.2
284 383 6.4 1.5 189.5 0.33 2.03 3.02 1.98 112
279 358 6.4 1.5 186.5 0.52 1.31 1.95 1.28 62.2
267 312 1.5 0.8 105 0.35 1.95 2.90 1.91 11.2
274 343 3.5 1.5 138.5 0.33 2.03 3.02 1.98 42.8
281 347 6.4 1.5 140 0.37 1.80 2.69 1.76 39.2
287 378 6.4 1.5 162.5 0.40 1.68 2.50 1.64 62.2
287 400 6.8 1.5 160 0.33 2.03 3.02 1.98 88.9
328 496 6.4 1.5 365.5 0.94 0.71 1.06 0.70 266
286 347 6.4 1.5 140 0.37 1.80 2.69 1.76 37.3
296 372 9.7 1.5 159 0.39 1.71 2.54 1.67 62.7
295 395 6.4 1.5 225.5 0.61 1.11 1.66 1.09 86.8
292 400 6.8 1.5 160 0.33 2.03 3.02 1.98 86.3
299 451 6.4 1.5 196.5 0.31 2.16 3.22 2.12 190
283 343 3.5 1.5 136.5 0.36 1.87 2.79 1.83 31.7
277 312 1.5 0.8 105 0.35 1.95 2.90 1.91 9.37
285 343 3.5 1.5 136.5 0.36 1.87 2.79 1.83 30.7
296 378 6.4 1.5 162.5 0.40 1.68 2.50 1.64 57.6
296 364 6.4 1.5 146.5 0.33 2.03 3.02 1.98 52.3
301 378 6.4 1.5 162.5 0.40 1.68 2.50 1.64 55.3
300 362 3.5 1.5 138.5 0.40 1.68 2.50 1.64 28.5
321 433 9.7 1.5 187.5 0.38 1.78 2.65 1.74 125
303 451 1.3 1.5 196.5 0.31 2.16 3.22 2.12 179
302 368 3.5 1.5 163 0.43 1.56 2.33 1.53 40.7
309 384 6.8 1.5 158 0.39 1.75 2.61 1.71 56.5
B-145