Radial Play Tables

Specifying Radial Play Tables:

It is not practical, or perhaps even possible, to produce a group of bearings that all have the exact same amount of radial play tables. This is because all of the features of the bearing components (inner ring raceway, outer ring raceway, and balls) that effect radial play, have manufacturing tolerances associated with them. Manufacturers measure and sort  the bearing rings and balls so that they can be “matched” during the assembly process to achieve a specific range of radial play for a group (or manufacturing lot) of bearings.

There are several ways to specify radial play tables. Radial play specifications are usually manufacturer dependent. Complete part number descriptions are detailed in a separate Technical Information Sheet (TIS). NPB specifies radial play as follows:

For Metric/ Inch design ball bearings (miniature and instrument) with a bore diameter of less than 10 mm.

Clearance Symbol 

MC1 (Extra Tight) 

MC2 (Tight) 

MC3 (Normal) 

MC4 (Normal +) 

MC5 (Loose) 

MC6 (Extra Loose) 

Actual Clearance in uM 

min 

0

3

5

8

13

20

max 

5

8

10

13

20

28

Actual Clearance in inches 

min 

0

0.0001

0.0002

0.0003

0.0005

0.0008

max 

0.0002

0.0003

0.0004

0.0005

0.0008

0.0011

Clearance for Radial Deep Grove Ball Bearings in Micro meters

Bore   Diameter (d)    in mm

Bore   Diameter (d)    in inches

C2 (less than standard clearance) 

C0 (standard clearance) 

C3 (greater than standard clearance) 

C4 (greater than C3 clearance) 

C5 (greater than C4 clearance) 

OVER 

INCL. 

OVER 

INCL. 

min. 

max 

min. 

max. 

min. 

max. 

min. 

max. 

min. 

max. 

2.5

6

0.0984

0.2362

0

7

2

13

8

23

6

10

0.2362

0.3937

0

7

2

13

8

23

14

29

20

37

10

18

0.3937

0.7087

0

9

3

18

11

25

18

33

25

45

18

24

0.7087

0.9449

0

10

5

20

13

28

20

36

28

48

24

30

0.9449

1.1811

1

11

5

20

13

28

23

41

30

53

30

40

1.1811

1.5748

1

11

6

20

15

33

28

46

40

64

40

50

1.5748

1.9685

1

11

6

23

18

36

30

51

45

73

50

65

1.9685

2.5591

1

15

8

28

23

43

38

61

55

90

65

80

2.5591

3.1496

1

15

10

30

25

51

46

71

65

105

80

100

3.1496

3.9370

1

18

12

36

30

58

53

84

75

120

100

120

3.9370

4.7244

2

20

15

41

36

66

61

97

90

140

120

140

4.7244

5.5118

2

23

18

48

41

81

71

114

105

160

Values  are in micrometers 

Clearance for Radial Deep Grove Ball Bearings in Inches  (.0001”)

Bore   Diameter (d)    in mm

Bore   Diameter (d)    in inches

C2 (less than standard clearance) 

C0 (standard clearance) 

C3 (greater than standard clearance) 

C4 (greater than C3 clearance) 

C5 (greater than C4 clearance) 

OVER 

INCL. 

OVER 

INCL. 

min. 

max 

min. 

max. 

min. 

max. 

min. 

max. 

min. 

max. 

2.5

6

0.0984

0.2362

0

3

1

5

3

9

6

10

0.2362

0.3937

0

3

1

5

3

9

6

11

8

15

10

18

0.3937

0.7087

0

3.5

1

7

4.5

10

7

13

10

18

18

24

0.7087

0.9449

0

4

2

8

5

11

8

14

11

19

24

30

0.9449

1.1811

0.5

4,5

2

8

5

11

9

16

12

21

30

40

1.1811

1.5748

0.5

4.5

2.5

8

6

13

11

18

16

25

40

50

1.5748

1.9685

0.5

4.5

2.5

9

7

14

12

20

18

29

50

65

1.9685

2.5591

0.5

6

3

11

9

17

15

24

22

35

65

80

2.5591

3.1496

0.5

6

4

12

10

20

18

28

26

41

80

100

3.1496

3.9370

0.5

7

4.5

14

12

23

21

33

30

47

100

120

3.9370

4.7244

1

8

6

16

14

26

24

38

35

55

120

140

4.7244

5.5118

1

9

7

19

16

32

28

45

41

63

Values are in .0001  inches