Fit Tool
Imperial Fits Calculator
Calculate inch-based hole and shaft limits for common ANSI fit classes, including running and sliding fits, locational clearance fits, transition fits, locational interference fits, and force or shrink fits.
Inputs
Outputs
| Parameter | Value |
|---|
Tolerance Zones
Below basic size Basic size Above basic size
Hole
Shaft
References
Fit families and tolerance limits are tabulated from the ANSI B4.1 inch-system tables as presented in Machinery's Handbook, 29th Edition, pages 641-648. Values are stored in thousandths of an inch and added to the entered basic size to display hole and shaft limits.
Use this as a design calculator and verify production-critical fits against the governing ANSI B4.1 table, drawing standard, and supplier process capability.