Clamping on mandrels
Work parts that have a bore hole, which can be very small, are clamped from the inside with clamping mandrels.
Two types can be distinguished: fixed mandrels and expanding mandrels.
Fixed mandrels are minimally conical (cone 1:2000) and are clamped between centers. They are only used
for finish turning since only low cutting depths are possible. The rotary accuracy of the centers must be
checked before being used.
Expanding mandrels are inserted into the inner cone of the main spindle. Clamping is established by the
slotted clamping part of the mandrel according to the rotary accuracy as well as by an even grip on the work
part. Clamping is enabled by pressing in the taper plug.