ETC EVO BEARING INTERNAL CLEARANCE.
Typical clearance groups for ETC EVO deep groove ball bearings are C2, CN, C3, C4, and C5. Internal clearance is determined so that appropriate clearance will remain after the bearing is mounted to the shaft with an interference fit, but with no fit (no interference) between the outer ring and housing and the temperature difference between inner and outer ring is 10 or less.
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C2: less than Normal
clearance |
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C3: more than Normal
clearance |
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C4: more than C3 |
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C5: more than C4 |
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CM : clearance for EMQ Bearing |
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MC: clearance for
Miniature bearing |
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Data of standard radial
clearances for under no load |
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Tolerance in um. |
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Bore |
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C2 |
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Normal |
C3 |
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C4 |
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C5 |
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Over |
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Including |
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mm |
lnch |
mm |
lnch |
min. |
max. |
min. |
max. |
min. |
max. |
min. |
max. |
min. |
max. |
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2.5 |
0.0984 |
10 |
0.394 |
0 |
7 |
2 |
13 |
8 |
23 |
14 |
29 |
20 |
37 |
|
10 |
0.3937 |
18 |
0.709 |
0 |
9 |
3 |
18 |
11 |
25 |
18 |
33 |
25 |
45 |
|
18 |
0.7887 |
24 |
0.945 |
0 |
10 |
5 |
20 |
13 |
28 |
20 |
36 |
28 |
48 |
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24 |
0.9449 |
30 |
1.181 |
1 |
11 |
5 |
20 |
13 |
28 |
23 |
41 |
30 |
53 |
|
30 |
1.1811 |
40 |
1.575 |
1 |
11 |
6 |
20 |
15 |
33 |
28 |
46 |
40 |
64 |
|
40 |
1.5748 |
50 |
1.969 |
1 |
11 |
6 |
23 |
18 |
36 |
30 |
51 |
45 |
73 |
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50 |
1.9685 |
65 |
2.559 |
1 |
15 |
8 |
28 |
23 |
43 |
38 |
61 |
55 |
90 |
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The radial clearances of
bearings with eelectric motor quality |
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Tolerance in um. |
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Bore |
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CM |
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Over |
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Including |
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Min. |
Max. |
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mm |
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lnch |
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mm |
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lnch |
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um |
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um |
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10 |
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0.9397 |
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18 |
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0.7087 |
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4 |
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11 |
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18 |
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0.7087 |
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24 |
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0.9449 |
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5 |
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12 |
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24 |
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0.9449 |
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30 |
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1.1811 |
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5 |
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12 |
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30 |
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1.1811 |
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40 |
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1.5748 |
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9 |
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17 |
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40 |
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1.5748 |
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50 |
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1.9685 |
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9 |
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17 |
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50 |
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1.9685 |
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65 |
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2.5591 |
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12 |
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22 |
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Data of the mini-deep
groove ball bearing under no load |
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Tolerance in um. |
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Clearance code |
MC1 |
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MC2 |
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MC3 |
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MC4 |
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MC5 |
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MC6 |
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Clearance |
min. |
max. |
min. |
max. |
min. |
max. |
min. |
max. |
min. |
max. |
min. |
max. |
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0 |
5 |
3 |
8 |
5 |
10 |
8 |
13 |
14 |
21 |
21 |
29 |