Machinery's Handbook, 31st Edition
Ball and Roller Bearings 2467 Table 19. AFBMA and American National Standard Tolerance Limits for Shaft Raceway and Housing Bore Diameters—Needle Roller Bearings, Drawn Cup, Without Inner Ring, Metric Types NB, NBM, NY, NYM, NH, and NHM ANSI/ABMA 18.1-1982 (R1999)
Shaft Raceway Diameter a Allowable Deviation from F w
Housing Bore Diameter a Allowable Deviation from D
Basic Outside Diameter, D
Basic Bore Diameter Under Needle Rollers, F w
OUTER RING STATIONARY RELATIVE TO LOAD
mm
Inch
ANSI h6, Inch
mm
Inch
ANSI N7, Inch
Over Incl. Over
Incl.
High
Low Over Incl. Over
Incl.
Low
High
3 6 0.1181 0.2362 6 10 0.2362 0.3937 10 18 0.3937 0.7087 18 30 0.7087 1.1811 30 50 1.1811 1.9685 50 80 1.9685 3.1496
+0 +0 +0 +0 +0 +0
6 10 0.2362 0.3937
− 0.0003
− 0.0007 − 0.0009 − 0.0011 − 0.0013 − 0.0015
− 0.0002 − 0.0002 − 0.0003 − 0.0003 − 0.0004
− 0.0004 10 18 0.3937 0.7087 − 0.0004 18 30 0.7087 1.1811 − 0.0005 30 50 1.1811 1.9685 − 0.0006 50 80 1.9685 3.1496
− 0.0007 …… … … … …
OUTER RING ROTATING RELATIVE TO LOAD
mm
Inch
ANSI f6, Inch
mm
Inch
ANSI R7, Inch
Over Incl. Over
Incl.
High
Low Over Incl. Over
Incl.
Low
High
3 6 0.1181 0.2362 6 10 0.2362 0.3937 10 18 0.3937 0.7087 18 30 0.7087 1.1811 30 50 1.1811 1.9685 50 80 1.9685 3.1496
6 10 0.2362 0.3937
− 0.0004 − 0.0005 − 0.0006 − 0.0008 − 0.0010 − 0.0012
− 0.0007
− 0.0011 − 0.0013 − 0.0016 − 0.0020 − 0.0024 − 0.0024
− 0.0005 − 0.0006 − 0.0008 − 0.0010 − 0.0012 − 0.0013
− 0.0009 10 18 0.3937 0.7087 − 0.0011 18 30 0.7087 1.1811 − 0.0013 30 50 1.1811 1.9685 − 0.0016 50 65 1.9685 2.5591 − 0.0019 65 80 2.5591 3.1496
For bearing tolerances, see Table 11. Table 20. AFBMA and American National Standard Tolerance Limits for Shaft Raceway and Housing Bore Diameters—Needle Roller Bearings, With Cage, Machined Ring, Without Inner Ring, Inch Type NIA ANSI/ABMA 18.2-1982 (R1999) Basic Bore Diameter under Needle Rollers, F w Shaft Raceway Diameter a Allowable Deviation from F w Basic Outside Diameter, D Housing Bore Diameter a Allowable Deviation from D OUTER RING STATIONARY RELATIVE TO LOAD Inch ANSI h6, Inch Inch ANSI H7, Inch Over Incl. High Low Over Incl. Low High 0.2362 0.3937 +0 − 0.0004 0.3937 0.7087 +0 +0.0007 0.3937 0.7087 +0 − 0.0004 0.7087 1.1811 +0 +0.0008 0.7087 1.1811 +0 − 0.0005 1.1811 1.9685 +0 +0.0010 1.1811 1.9685 +0 − 0.0006 1.9685 3.1496 +0 +0.0012 1.9685 3.1496 +0 − 0.0007 3.1496 4.7244 +0 +0.0014 3.1496 4.7244 +0 − 0.0009 4.7244 7.0866 +0 +0.0016 4.7244 7.0866 +0 − 0.0010 7.0866 9.8425 +0 +0.0018 7.0866 9.8425 +0 − 0.0011 9.8425 12.4016 +0 +0.0020 OUTER RING ROTATING RELATIVE TO LOAD Inch ANSI f6, Inch Inch ANSI N7, Inch Over Incl. High Low Over Incl. Low High 0.2362 0.3937 − 0.0005 − 0.0009 0.3937 0.7087 − 0.0009 − 0.0002 0.3937 0.7087 − 0.0006 − 0.0011 0.7087 1.1811 − 0.0011 − 0.0003 0.7087 1.1811 − 0.0008 − 0.0013 1.1811 1.9685 − 0.0013 − 0.0003 1.1811 1.9685 − 0.0010 − 0.0016 1.9685 3.1496 − 0.0015 − 0.0004 1.9685 3.1496 − 0.0012 − 0.0019 3.1496 4.7244 − 0.0018 − 0.0004 3.1496 4.7244 − 0.0014 − 0.0023 4.7244 7.0866 − 0.0020 − 0.0005 4.7244 7.0866 − 0.0016 − 0.0027 7.0866 9.8425 − 0.0024 − 0.0006 7.0866 9.8425 − 0.0020 − 0.0031 9.8425 11.2205 − 0.0026 − 0.0006
a See text for additional requirements. For bearing tolerances, see Table 12.
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