NTN - Large Bearings

Double Row Tapered Roller Bearings (Outside Direction)
Sb
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 Constant Axial load factors Mass
center
mm mm kg
d a D b S b r as r las
min min min max max a e Y 1 Y 2 Y o (approx.)
598 781 40 5 2.5 318 0.35 1.95 2.90 1.91 512
612 754 38.5 4 2 288 0.39 1.74 2.59 1.70 291
628 828 12 5 2.5 277 0.37 1.80 2.69 1.76 348
636 925 18 6 3 350 0.40 1.68 2.50 1.64 858
636 923 44 6 3 380 0.38 1.77 2.64 1.73 1,050
688 809 17.5 3 1.5 283 0.40 1.68 2.50 1.64 201
688 845.5 27.5 3 2 317 0.45 1.51 2.25 1.48 277
706 1,033 20.5 6 3 397 0.40 1.68 2.50 1.64 1,180
706 1,021 28 6 3 397 0.37 1.80 2.69 1.76 1,410
746 974 14 6 3 327 0.37 1.80 2.69 1.76 640
746 974 14 6 3 324 0.36 1.87 2.79 1.83 654
746 982 29.5 6 3 362 0.39 1.73 2.58 1.69 810
836 1,092.5 47 6 3 400 0.37 1.80 2.69 1.76 1,119
1,068 1,260 40 5 2 472.3 0.40 1.68 2.50 1.64 975
1,137 1,396.5 40 4 2 554 0.47 1.43 2.12 1.40 1,255
B-139