AutoEngCalc - Engineering Calculators

GD&T Fit Calculator

Calculate ISO hole/shaft tolerances (H7/g6, etc.). Instant max/min limits, allowance, clearance/interference and fit type per ISO 286.

H7/g6 Fit
Clearance 0–25 μm
50mm nominal diameter

ISO Tolerance Fit

Featured: Hole/Shaft • Clearance • Interference • Limits

Fit Allowance Visualization

Hole vs Shaft tolerance bands

ISO Fit Types

Hole basis system (H hole = lower limit 0)

Clearance: shaft below hole (g, h, f)

Transition: overlap possible (k, n)

Interference: shaft above hole (p, s)

Enter nominal size and tolerances

Common ISO Fits

Clearance Fits

H11/c11: Loose running

H9/d9: Free running

H8/f7: Close running

H7/g6: Sliding fit

H7/h6: Locational clearance

Transition & Interference

H7/k6: Locational transition

H7/n6: Transition

H7/p6: Interference (press)

H7/s6: Heavy interference

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