Fits & Tolerances Spec Table
Fits define the dimensional relationship between shafts and holes for tolerance design. Clearance fits are used for rotating and sliding parts; interference fits for permanent assemblies; transition fits for precise location. Correct specification of tolerance zone combinations per ISO 286 (e.g., H7/k6, H7/p6) is essential for assembly quality.
Clearance Fit
Clearance Fit · 4 sizes
Transition Fit
Transition Fit · 4 sizes
Interference Fit
Interference Fit · 6 sizes
Frequently Asked Questions
What is the difference between H7/g6, H7/k6, and H7/p6?
H7/g6 is clearance fit (rotation/sliding), H7/k6 is transition (positioning), H7/p6 is interference (press fit). Higher deviation letters indicate tighter interference.
How do I choose a fit tolerance?
Choose clearance (g–h) where disassembly is needed, transition (j–k) for precise positioning, and interference (m–u) for permanent fixing. Also consider thermal expansion, material, and load.