Hardness:
The collets are made from special spring steel. Where possible, by partial tempering, the hardness of the taper and clamping bore is approx. HRc 60. The shank and sprung area are hardened to spring.
Taper grinding:
The clamping taper is lightly ground at the slot edges to ease removal of the collets from the mounting thus making possible low undersized clamping.
Stops for collets:
Adjustable stops which are easily fitted into the rear bore of the collets. Bores are available for standard models.