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.



C2:   less than Normal clearance

C3:   more than Normal clearance

C4:   more than C3

C5:   more than C4

 

 

CM : clearance for EMQ Bearing

MC:  clearance for Miniature bearing

 

Data of standard radial clearances for under no load

Tolerance in um.

 

Bore

 

 

C2

 

Normal

C3

 

C4

 

C5

 

Over

 

Including

 

 

 

 

 

 

 

 

 

 

 

mm

lnch

mm

lnch

min.

max.

min.

max.

min.

max.

min.

max.

min.

max.

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

 

 

 

 

 

 

 

 

 

 

 

 

 

 

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

 

 

 

 

 

 

 

 

 

 

 

 

 

 

50

1.9685

65

2.559

1

15

8

28

23

43

38

61

55

90

The radial clearances of bearings with eelectric motor quality

Tolerance in um.

 

 

 

Bore

 

 

 

 

 

 

 

CM

 

 

 

Over

 

Including

 

Min.

Max.

 

mm

 

lnch

 

 

mm

 

 

lnch

 

um

 

um

 

10

 

0.9397

 

18

 

0.7087

 

4

 

11

 

18

 

0.7087

 

24

 

0.9449

 

5

 

12

 

24

 

0.9449

 

30

 

1.1811

 

5

 

12

 

30

 

1.1811

 

40

 

1.5748

 

9

 

17

 

40

 

1.5748

 

50

 

1.9685

 

9

 

17

 

50

 

1.9685

 

 

65

 

 

2.5591

 

12

 

22

 

Data of the mini-deep groove ball bearing under no load

Tolerance in um.

Clearance code

MC1

 

MC2

 

MC3

 

MC4

 

MC5

 

MC6

 

Clearance

min.

max.

min.

max.

min.

max.

min.

max.

min.

max.

min.

max.

 

 

0

5

3

8

5

10

8

13

14

21

21

29