Machinery's Handbook, 31st Edition
652 LIMITS AND FITS The limits for hole and shaft as given in Table 8a to Table 12 are increased for clearance fits ( decreased for transition or interference fits) by the value of the upper shaft limit, that is, by the amount required to change the maximum shaft to the basic size. Graphical Representation of ANSI/ASME Standard Limits and Fits ANSI/ASME B4.1-1967 (2009; out of print)
Hole Tolerance
Shaft Tolerance
6 4 2 0
RC9
RC8
RC6 RC7
RC2 RC3 RC4 RC5
RC1
–2 –4 –6 –8 –10
Running or Sliding Fits
LC11
12 10
LC10
8 6 4 2 0
LC9
LC8
LC7
LC4
LC3
LC5 LC6
LC2 LC1
–2 –4 –6 –8
–10 –12 –14 –16 –18 –20 –22
Clearance Locational Fits
2 1 0 –1
LT6
LT2
LT4
LT5
LT1
LT3
Transition Fits
FN5
2 1 0 –1
FN3 FN4
FN2
LN3
2 1 0
LN2
FN1
LN1
Interference Locational Fits
Force or Shrink Fits
Diagrams show disposition of hole and shaft tolerances (in thousandths of an inch) with respect to basic size (0) for a diameter of 1 inch.
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