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adial Play<br />
Radial play is the radial internal looseness between the balls and the races,<br />
and is the measured value of the total movement of one ring with respect to<br />
the other in a plane perpendicular to the bearing axis. Factors that require<br />
control of radial play are:<br />
• Speeds<br />
• Loads<br />
• Thermal conditions<br />
• Mounting fits<br />
• Axial motion<br />
• Deflection rates<br />
Improper selection of radial play can affect bearing torque and the overall<br />
running performance, which will result in premature bearing failure.<br />
Please see the reference chart below for radial play ranges. For more<br />
information regarding your specific application, please contact one of <strong>LMS</strong><br />
Bearings’ engineering staff for assistance.<br />
bearing technical data<br />
Radial Play<br />
radial Play - miniature and instrument bearings<br />
TYPE RANGE <strong>LMS</strong> Designation<br />
Tight .0001 inch to .0003 inch P13<br />
Normal .0002 inch to .0005 inch P25<br />
Loose .0005 inch to .0008 inch P58<br />
Extra Loose .0008 inch to .0011 inch P811<br />
radial Play - metric and large inch series ball bearings<br />
MM<br />
BORE DIAMETER<br />
INCH<br />
C2<br />
Tight<br />
C0<br />
Standard<br />
Acceptance Limits<br />
C3<br />
Loose<br />
C4<br />
Extra Loose<br />
OVER INCL. OVER INCL. Low High Low High Low High Low High<br />
- 2.5 - .0984 0 3 1 5 3 9 5 11<br />
2.5 6 .0984 .2362 0 3 1 5 3 9 5 11<br />
6 10 .2362 .3937 0 3 1 5 3 9 5 11<br />
10 18 .3937 .7087 0 3.5 1 7 4 10 7 13<br />
18 24 .7087 .9449 0 4 2 8 5 11 8 14<br />
24 30 .9449 1.1811 0 4.5 2 8 5 11 9 16<br />
30 40 1.1811 1.5748 0 4.5 2 8 6 13 11 18<br />
40 50 1.5748 1.9685 0 4.5 2 9 7 14 12 20<br />
50 65 1.9685 2.5591 0 6 3 11 9 17 15 24<br />
65 80 2.5591 3.1496 0 6 4 12 10 20 18 28<br />
80 100 3.1496 3.9370 0 7 5 14 12 23 21 33<br />
100 120 3.9370 4.7244 0 8 6 16 14 26 24 38<br />
Note: Measurements described in AFBMA Standards - Section 4, Gauging Practices<br />
Values in .0001”<br />
Tel: (303) 661-0681 • Fax: (303) 661-9811 • www.lmsbearings.com 23
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