ISO PREFERRED FITS CALCULATOR

ISO preferred fits calculator to calculate preferred tolerances of shafts and holes according to metric ISO 286-1 (2010) and ANSI B4.2 (1978) standards. Size limits and deviations are calculated and fit type (clearance, transition and interference) is found by the calculator.

ISO Preferred Fits and Tolerance Calculator:

INPUT PARAMETERS
Parameter Value Unit
Nominal Size mm
Hole Tolerance ---
Shaft Tolerance ---
 




Note : Use dot "." as decimal separator.


RESULTS
HOLE
Parameter Value Unit
Designation --- ---
Hole Upper Deviation ---  μm (0.001mm)
Hole Lower Deviation --- μm (0.001mm)
Maximum Hole Size --- mm
Minimum Hole Size --- mm
SHAFT
Parameter Value Unit
Designation --- ---
Shaft Upper Deviation ---  μm (0.001mm)
Shaft Lower Deviation ---  μm (0.001mm)
Maximum Shaft Size --- mm
Minimum Shaft Size --- mm
FIT
Parameter Value Unit
Designation --- ---
Fit Type --- ---
Maximum Clearance --- μm (0.001mm)
Minimum Clearance --- μm (0.001mm)

Reference:

  • ISO 286-1 (2010) Geometrical product specifications (GPS) - ISO code system for tolerances on linear sizes - Part 1: Basis of tolerances, deviations and fits
  • ISO 286-2 (2010) Geometrical product specifications (GPS) - ISO code system for tolerances on linear sizes - Part 2: Tables of standard tolerance classes and limit deviations for holes and shafts
  • ANSI/ASME B4.2 (1978) Preferred Metric Limits and Fits