- Joined
- Jun 12, 2014
- Messages
- 4,817
The spec is usually 0.004" or better for integrated keyless chucks, probably hit or miss, also depends on the size pin in the chuck used for measuring. Llambrich does have a better spec. for their integrated chucks, maximum 0.0016" and 0.0012" at 50 mm for the Hexa keyed chuck System (which also permits reversing the chuck). There is also the angular component of how straight the chuck holds the tooling, not sure if this is the same between manufactures of where they measure TIR. If I need to be down in the 0.001" range, I use my ER collets. I have been looking at the Llambrich Hexa chuck with an integrated R8 shank for repetitive tasks where I need to switch tooling (but expensive).