- High precision bore (H5) is best in industry
- Balanced to 15,000 RPM at G6.3
- Taper ground at AT3 for maximum spindle contact
All Techniks end mill holder bores are manufactured to meet or exceed the H5 specification. H5 is an extremely accurate bore I.D. and provides improved T.I.R. for extended cutting tool life.
You lose 10% of tool life for every .0001″ of T.I.R. Techniks H5 bore tolerance to extends cutting tool life.