UGT BEARING INTERNAL CLEARANCE

Typical clearance groups for UGT 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 electric 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