NTN - Precision Rolling Bearings
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Main Spindle <strong>Bearings</strong><br />
r1as<br />
ras<br />
da Db<br />
ras<br />
ras<br />
da Da<br />
Dynamic equivalent radial load<br />
PrXFrYFa<br />
Single row / Tandem Back-to-back / Face-to-face<br />
ifoFa<br />
e FaFre FaFre FaFre FaFre<br />
Cor<br />
X Y X Y X Y X Y<br />
0.178 0.38<br />
0.357 0.4<br />
0.714 0.43<br />
1.47<br />
1.4<br />
1.3<br />
1.65<br />
1.57<br />
1.46<br />
2.39<br />
2.28<br />
2.11<br />
1.07 0.46<br />
1.23 1.38 2<br />
1.43 0.47 1 0 0.44 1.19 1 1.34 0.72 1.93<br />
2.14<br />
3.57<br />
5.35<br />
7.14<br />
0.5<br />
0.55<br />
0.56<br />
0.56<br />
1.12<br />
1.02<br />
1<br />
1<br />
1.26<br />
1.14<br />
1.12<br />
1.12<br />
1.82<br />
1.66<br />
1.63<br />
1.63<br />
Back-to-back<br />
(DB)<br />
Face-to-face<br />
(DF)<br />
Static equivalent radial load<br />
PorXo FrYo Fa<br />
Single row / Tandem Back-to-back / Face-to-face<br />
Xo Yo Xo Yo<br />
0.5 0.46 1 0.92<br />
When Por Fr with single-row or tandem<br />
arrangement, Por Fr.<br />
Load Internal Mass Reference dimensions Abutment and fillet dimensions Part<br />
center free space number<br />
mm cm 3 kg mm<br />
Single-row Single-row da Da Db ras r1as<br />
a (approx.) (approx.) d1 D1 D2 min max max max max<br />
7.3 0.9 0.029 17.4 23.5 25.5 14.5 25.5 27.5 0.6 0.3 7200C<br />
8.0 1.3 0.036 18.4 25.6 27.8 16.5 27.5 29.5 0.6 0.3 7201C<br />
8.9 1.5 0.045 20.8 29.0 31.6 19.5 30.5 32.5 0.6 0.3 7202C<br />
9.9 2.1 0.062 24.2 33.2 36.2 21.5 35.5 37.5 0.6 0.3 7203C<br />
11.6 3.1 0.10 29.4 39.4 42.8 25.5 41.5 42.5 1 0.6 7204C<br />
12.7 4.1 0.12 33.8 44.2 47.3 30.5 46.5 47.5 1 0.6 7205C<br />
14.3 6.6 0.19 40.6 52.2 56.4 35.5 56.5 57.5 1 0.6 7206C<br />
15.7 8.8 0.27 46.8 60.2 65.0 42 65 67.5 1 0.6 7207C<br />
17.1 11 0.35 53.0 67.0 72.3 47 73 75.5 1 0.6 7208C<br />
18.2 14 0.40 57.3 72.5 78.1 52 78 80.5 1 0.6 7209C<br />
19.4 17 0.45 62.2 77.6 83.2 57 83 85.5 1 0.6 7210C<br />
20.9 21 0.59 69.0 86.0 92.3 63.5 91.5 94.5 1.5 1 7211C<br />
22.6 28 0.76 77.0 96.0 102.9 68.5 101.5 104.5 1.5 1 7212C<br />
23.9 34 0.95 82.5 102.5 109.7 73.5 111.5 114.5 1.5 1 7213C<br />
25.1 40 1.04 87.0 108.0 115.5 78.5 116.5 119.5 1.5 1 7214C<br />
26.4 43 1.14 93.0 114.0 121.5 83.5 121.5 124.5 1.5 1 7215C<br />
27.8 54 1.39 98.1 121.4 129.6 90 130 134.5 2 1 7216C<br />
29.9 63 1.73 106.1 129.9 138.5 95 140 144.5 2 1 7217C<br />
31.8 80 2.13 111.6 138.5 147.9 100 150 154.5 2 1 7218C<br />
33.8 96 2.58 118.2 146.8 157.0 107 158 163 2 1 7219C<br />
35.8 119 3.21 124.8 155.2 166.2 112 168 173 2 1 7220C<br />
37.8 147 3.81 131.3 163.7 175.3 117 178 183 2 1 7221CT1B<br />
39.9 171 4.49 138.0 172.0 184.4 122 188 193 2 1 7222CT1B<br />
42.5 206 5.44 149.0 186.0 198.6 132 203 208 2 1 7224CT1B<br />
44.2 232 6.19 161.0 199.0 212.6 144 216 223 2.5 1 7226CT1B<br />
97
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