Typical application
Suitable for freely moving guides, sliding hubs, and assemblies where binding must be avoided.
Fits & tolerances · ISO 286
Calculate an H7/g6 fit
A clearance fit with guaranteed separation between hole and shaft.
ISO286
02
Results
Fit selection
Compare common fits
Compare limit values at the current nominal size. Optionally narrow the results to a desired range in µm.
H7/g6 in practice
Understanding the limits
The shaft tolerance zone lies entirely below the zero line, preserving clearance at the worst-case limits.
Alternatives
H7/h6 reduces minimum clearance to zero. H7/k6 locates more closely and may create interference depending on nominal size.
From function to fit
What this calculator does
From nominal size plus hole and shaft tolerance classes, the calculator returns limit sizes and minimum/maximum clearance or interference.
ISO 286 defines hole and shaft sizes. Performance in the actual assembly also depends on temperature, form, surface texture, and assembly conditions.
Typical tasks
- Bearing and bushing seats
- Guides with controlled clearance
- Locating fits and removable hubs
Design notes and follow-up standards
Check before release
Operating temperature
Differential thermal expansion can turn clearance into interference, or the reverse.
Geometry and surface
Roundness, cylindricity, and roughness are not controlled by a size fit.
Functional requirement
Derive minimum clearance or interference from load, lubrication, and assembly needs.
Useful follow-up standards
ISO 1101
Geometrical tolerances for form, orientation, location, and run-out.
ISO 14405-1
Unambiguous specification of linear sizes on drawings.
ISO 21920
Surface texture specification for sliding, sealing, or joining functions.