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Technical Data - Radial




MC METHOD OF SPECIFYING RADIAL PLAY

SYMBOL METRIC (0.001MM) INCH (0.0001")
MC1 0 5 0.0000" 0.0002"
MC2 3 8 0.0001" 0.0003"
MC3 5 10 0.0002" 0.0004"
MC4 8 13 0.0003" 0.0005"
MC5 13 20 0.0005" 0.0008"
MC6 20 28 0.0008" 0.0011"


AFBMA C2 THROUGH C4 METHOD OF SPECIFYING RADIAL PLAY

    C2
(LESS THAN STANDARD
CLEARANCE) 		C0
(STANDARD
CLEARANCE) 		C3
(GREATER THAN STANDARD
CLEARANCE) 		C4
(GREATER THAN
C3 CLEARANCE)
BORE IN
INCHES 		BORE IN
MM 		ACCEPTANCE LIMITS ACCEPTANCE LIMITS ACCEPTANCE LIMITS ACCEPTANCE LIMITS
  MFG. LIMITS     MFG. LIMITS     MFG. LIMITS     MFG. LIMITS  
OVER INCL. OVER INCL. LOW LOW HIGH HIGH LOW LOW HIGH HIGH LOW LOW HIGH HIGH LOW LOW HIGH HIGH
0.0984 0.3937 2.5 10 - - 2.5 3 1 1.5 4.5 5 3 4 8 9 5 6 10 11
0.3937 0.7087 10 18 - - 3 3.5 1 2 6 7 4 5 9 10 7 8 12 13
0.7087 0.9450 18 24 - - 3.5 4 2 3 7 8 5 6 10 11 8 9 13 14
0.9450 1.1811 24 30 - - 4 4.5 2 3 7 8 5 6 10 11 9 10 15 16
1.1811 1.5748 30 40 - - 4 4.5 2 3 7 8 6 7 12 13 11 12 17 18
1.5748 1.9685 40 50 - - 4 4.5 2 3 8 9 7 8 13 14 12 13 19 20
1.9685 2.5591 50 65 - 1 5 6 3 4 10 11 9 10 16 17 15 16 23 24
2.5591 3.1496 65 80 - 1 5 6 4 5 11 12 10 11 19 20 18 19 27 28
3.1496 3.9370 80 100 - 1 6 7 5 6 13 14 12 13 22 23 21 22 32 33
3.9370 4.7244 100 120 - 1 7 8 6 7 15 16 14 15 25 26 24 25 37 38
4.7244 5.5118 120 140 - 1 8 9 7 8 18 19 16 18 30 32 28 30 43 45
Measurements described in AFBMA Standards Section 4 Gaging Practices. Values in 0.0001”.

K AND P METHOD OF SPECIFYING RADIAL PLAY
The K and P methods are the easiest and most straightforward methods of specifying radial play.
A “K” or “P” followed by numbers indicates the radial play in tenths of a thousandth of an inch.

Examples:

  • K13 or P13 = a radial play of .0001” - .0003”
  • K58 or P58 = a radial play of .0005” - .0008”
  • K1014 or P1014 = a radial play of .0010” - .0014”
Radial play is the radial internal looseness between the balls and races, and is the measured value of the total movement of one ring with respect to the other in a plane perpendicular to the bearing axis. Factors that require control of radial play are speeds, loads, thermal conditions, mounting fits, axial motion and deflection rates. Improper selection of radial play can affect bearing torque and overall running performance which could result in premature failure. Please see reference chart for radial play ranges. For more specific application needs, please contact our Engineering Staff for assistance.
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