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.)
224 275 3.5 0.8 133.5 0.51 1.33 1.97 1.30 16.5
231 318 3.3 1.5 160 0.33 2.03 3.02 1.98 65.2
227 275 3.5 0.8 133.5 0.51 1.33 1.97 1.30 16
233 300 4.3 1.5 161 0.52 1.29 1.92 1.26 36.3
230 279 3.5 0.8 126.5 0.48 1.40 2.09 1.37 15.7
233 279 3.5 0.8 126.5 0.48 1.40 2.09 1.37 15.1
232 276 3.5 0.8 94.5 0.38 1.77 2.64 1.73 11
245 300 6.4 1.5 122.5 0.33 2.03 3.02 1.98 28.9
274 397 6.4 3.3 276 0.88 0.77 1.14 0.75 116
255 313 6.4 1.5 129.5 0.41 1.66 2.47 1.62 27.3
260 334 7 1.5 185 0.59 1.14 1.70 1.12 49.4
257 330 6.8 1.5 132.5 0.33 2.04 3.04 2.00 49.4
258 339 6.4 1.5 164 0.47 1.43 2.12 1.40 49.4
256 343 3.5 1.5 138.5 0.33 2.03 3.02 1.98 50.9
271 367 10.5 1.5 181.5 0.44 1.54 2.29 1.50 88.3
297 456 6.4 1.5 333.5 0.94 0.72 1.07 0.70 207
263 343 6.4 1.5 138.5 0.33 2.03 3.02 1.98 50
252 301 3.5 0.8 111.5 0.36 1.86 2.77 1.82 17.9
259 313 6.4 1.5 129.5 0.41 1.66 2.47 1.62 25.9
265 334 7 1.5 185 0.59 1.14 1.70 1.12 47.5
269 362 6.4 1.5 181.5 0.33 2.03 3.02 1.98 96.2
267 343 6.4 1.5 138.5 0.33 2.03 3.02 1.98 48.2
264 313 6.4 1.5 129.5 0.41 1.66 2.47 1.62 24.3
267 329 6.4 1.5 133 0.35 1.91 2.85 1.87 35.4
269 337 6.4 1.5 132.5 0.36 1.85 2.76 1.81 40.8
278 378.1 6.4 1.5 162 0.40 1.68 2.50 1.64 66.5
273 385 6.4 1.5 177.5 0.33 2.03 3.02 1.98 101
277 407 6.4 1.5 170.5 0.34 2.00 2.98 1.96 128
B-143