NTN - Large Bearings

Double Row Tapered Roller Bearings (Inside Direction)
Sa
Da
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 2 Constant Axial load factors Mass
center
mm mm kg
d a D a S a r as r las
max max min min max max a e Y 1 Y 2 Y o (approx.)
200 286 265 12 2.5 3 8 0.37 1.80 2.69 1.76 27.2
197.5 238 264 3.5 4 1.5 – 5.5 0.58 1.17 1.75 1.15 71.6
208 278 260 12 2 2.5 17.5 0.37 1.80 2.69 1.76 17.9
212 306 285 12 2.5 3 8.5 0.37 1.80 2.69 1.76 34
215 293 267 5.4 2 2.5 – 1 0.37 1.80 2.69 1.76 32.5
218 298 280 12 2 2.5 19 0.37 1.80 2.69 1.76 21.7
222 326 300 12 2.5 3 8.5 0.37 1.80 2.69 1.76 41.7
226.5 326 290 7.8 2.5 2.5 – 1.5 0.40 1.68 2.50 1.64 52.1
224 326 277.5 3.1 2.5 1.5 – 2.5 0.42 1.60 2.39 1.57 55.9
248.5 398 341 6.3 4 2 – 48.5 0.37 1.80 2.69 1.76 158
244 308 288 5.5 2 2 28.5 0.39 1.74 2.59 1.70 20.3
242 326 310 12 2.5 3 21.5 0.37 1.80 2.69 1.76 29.8
248 352 325 14 3 4 14 0.40 1.68 2.50 1.64 52.2
262 346 330 14 2.5 3 23.5 0.37 1.80 2.69 1.76 32.6
276 377 345 6.6 3 3 20.5 0.40 1.68 2.50 1.64 60.2
268 382 355 14 3 4 17 0.40 1.68 2.50 1.64 64.6
275 382 343 7.5 3 3 – 1 0.40 1.68 2.50 1.64 80.7
275 382 342 7.5 3 3 – 1 0.40 1.68 2.50 1.64 80.7
265 341 311.5 3.5 3.3 1.5 11 0.35 1.91 2.85 1.87 36.8
297 459 385 3.5 4 2 – 7 0.49 1.38 2.06 1.35 202
285 382 365 14 3 4 25 0.37 1.80 2.69 1.76 47.3
289 382 345 3.4 3 3 15 0.43 1.57 2.34 1.53 68.3
290 422 385 16 3 4 16.5 0.40 1.68 2.50 1.64 90
287 405 355 7.5 3.3 1.5 49.5 0.61 1.11 1.66 1.09 95.7
300 381 353 7.1 2.5 3 27 0.35 1.95 2.90 1.91 38.5
305 402 385 16 3 4 29.5 0.37 1.80 2.69 1.76 51.2
315 438 400 16 4 5 16 0.40 1.68 2.50 1.64 95.8
B-155