NTN - Precision Rolling Bearings

Main Spindle Bearings
ras
ras
daDa
ras
r1as
dbDa
Dynamic equivalent radial load
PrXFrYFa
Single row / Tandem Back-to-back / Face-to-face
ifoFa
e FaFre FaFre FaFre FaFre
Cor
X Y X Y X Y X Y
0.178 0.35
0.357 0.36
0.714 0.38
1.57
1.53
1.46
1.76
1.71
1.64
2.56
2.48
2.38
1.07 0.4
1.42 1.59 2.31
1.43 0.41 1 0 0.44 1.38 1 1.55 0.72 2.25
2.14
3.57
5.35
7.14
0.43
0.44
0.47
0.49
1.33
1.25
1.18
1.13
1.49
1.4
1.32
1.26
2.16
2.03
1.92
1.83
Back-to-back
(DB)
Face-to-face
(DF)
Static equivalent radial load
PorXo FrYo Fa
Single row / Tandem Back-to-back / Face-to-face
Xo
0.52
Yo Xo Yo
0.54 1.04 1.08
When Por Fr with single-row or tandem
arrangement, Por Fr.
Load Internal Mass Reference dimensions Abutment and fillet dimensions Part
center free space number
mm cm 3 kg mm
Single-row Single-row da db Da ras r1as
a (approx.) (approx.) d1 d2 D1 min min max max max
5.2 0.3 0.009 14.0 12.7 18.0 12.2 11.2 20 0.3 0.15 5S-BNT900
5.4 0.4 0.010 16.0 14.7 20.0 14.2 13.2 22 0.3 0.15 5S-BNT901
6.4 0.6 0.014 19.0 17.4 24.0 17.2 16.2 26 0.3 0.15 5S-BNT902
6.7 0.8 0.015 21.0 19.4 26.0 19.2 18.2 28 0.3 0.15 5S-BNT903
8.4 1.4 0.033 25.5 23.5 31.4 22.5 21.5 34.5 0.3 0.15 5S-BNT904
9.0 1.7 0.039 30.5 28.5 36.5 27.5 26.5 39.5 0.3 0.15 5S-BNT905
9.7 1.9 0.044 35.5 33.5 41.5 32.5 31.5 44.5 0.3 0.15 5S-BNT906
11.1 2.8 0.063 41.2 38.5 48.8 39.5 37.5 50.5 0.6 0.3 5S-BNT907
12.9 4.5 0.100 47.0 44.4 55.0 44.5 42.5 57.5 0.6 0.3 5S-BNT908
13.6 5.2 0.110 52.1 49.1 60.9 49.5 48 63.5 0.6 0.3 5S-BNT909
14.2 6.2 0.110 56.6 53.6 65.4 54.5 52.5 67.5 0.6 0.3 5S-BNT910
15.6 7.8 0.160 63.2 60.1 71.8 60.5 59.5 74.5 1 0.6 5S-BNT911
16.3 8.3 0.170 68.1 65.1 76.9 65.5 64.5 79.5 1 0.6 5S-BNT912
17.0 8.9 0.190 73.1 70.1 81.9 70.5 69.5 84.5 1 0.6 5S-BNT913
197