H7, H6, and H8 tolerances in holes
What each class means and when to specify each one.
H7 is the world standard for assembly holes. H8 for clearance, H6 for bearing precision.
Full article in production by the HannaTools R&D Team. This is the initial version published for indexing — updated continuously.
Topics covered
- Definition and context
- State of the art
- Technical criteria
- Application to Hanna HR®
- Measurable metrics
- Normative references