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
7.2 1.1 0.019 17.0 15.0 23.0 14.5 12.5 25.5 0.6 0.3 BNT200
8.0 1.5 0.025 18.4 16.2 26.0 16.5 14.5 27.5 0.6 0.3 BNT201
8.9 2.2 0.035 20.8 18.4 29.4 19.5 17.5 30.5 0.6 0.3 BNT202
9.9 2.9 0.054 24.2 21.4 33.6 21.5 19.5 35.5 0.6 0.3 BNT203
11.7 4.6 0.092 29.4 26.2 39.4 25.5 24.5 41.5 1 0.6 BNT204
12.8 6.1 0.13 33.8 30.7 44.2 30.5 29.5 46.5 1 0.6 BNT205
14.3 8.3 0.20 40.6 36.6 52.6 35.5 34.5 56.5 1 0.6 BNT206
15.8 10 0.29 46.8 42.0 60.6 42 39.5 65 1 0.6 BNT207
17.2 13 0.38 53.0 47.7 67.0 47 44.5 73 1 0.6 BNT208
18.3 16 0.44 57.3 51.9 73.0 52 49.5 78 1 0.6 BNT209
19.5 20 0.46 62.2 56.8 78.0 57 54.5 83 1 0.6 BNT210
21.0 25 0.61 69.0 62.8 86.4 63.5 60.5 91.5 1.5 1 BNT211
22.8 32 0.78 77.0 70.2 96.4 68.5 65.5 101.5 1.5 1 BNT212
24.1 37 1.01 82.5 75.3 102.5 73.5 70.5 111.5 1.5 1 BNT213
25.2 47 1.08 87.0 79.5 108.0 78.5 75.5 116.5 1.5 1 BNT214
26.6 54 1.17 93.0 85.5 114.5 83.5 80.5 121.5 1.5 1 BNT215
27.9 58 1.45 98.1 90.4 122.0 90 85.5 130 2 1 BNT216
195