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ball bearings home > about ball bearings > ball bearing geometry
 
  Ball Bearings - Geometry (continued) _____________________________________________________________________

 
Standard radial play ranges and applications
Dimensions in .0001 inch (.001 mm)
DYNAROLL CODE
DESCRIPTION
RADIAL PLAY RANGE
APPLICATION
MIN
MAX
MC2
Tight
1  (3)
3  (8)
Low backlash gear systems with predominantly radial loading.
MC3
Standard
2  (5)
4  (10)
Low Speed electric motors.
MC4
Standard
3  (8)
5  (13)
Gears, belt drives, tape guides, synchros, servos.
MC5
Loose
5  (13)
8  (20)
High speed electric motors, tape guides, radial and axial loading.
Note that the final radial play after assembly is the important operating condition, therefore, compensation for interference must be made in the bearing specification. See section on mounting and fitting.

Contact Dynaroll directly for information on non-standard radial play ranges.

FORMULAE FOR RADIAL PLAY AND AXIAL PLAY:
RADIAL PLAY VS. AXIAL PLAY FOR DIFFERENT BALL SIZES (fi = fo = 0.56)
0.007 
(.175) 
0.006 
(.15) 
0.005 
(.125) 
0.004 
(.1) 
0.003 
(.075) 
0.002 
(.05) 
0.001 
(.025) 
BALL SIZE 
Inches (mm)
1/8 (3.175)
.0937 (2.381)
.0787 (2.000)
1/16 (1.588)
.0472 (1.200)
.0394 (1.000)
.0315 (.800)
.0236 (.600)
  0.0002
(.005)
0.0003
(.0075)
0.0004
(.01)
0.0005
(.0125)
0.0006
(.015)
0.0007
(.0175)
0.0008
(.02)
RADIAL PLAY Inches (mm)

Note that axial play is 6-10 times radial play, depending on bearing ball size.


 

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