to DIN ISO 10897
for tools with cylindrical shank
for tools with thread for draw-in bolt
Clamping tolerance:
Type A collets:
for tool shanks with tolerance h 10
Type B collets:
Clamping tolerance -0.5 mm
Hardness:
Type A collets (slotted on one end) have a head
hardness of approx. HRc 60 and are partially
tempered in the area at the end of the slots.
Type B collets, because of the clamping tolerance,
are hardened to approx. HRc 46.