Ordinary lathe spindle head type D8 and A28 What does it mean?
A2 type because the machine and the spindle part of the outer ring thread connection, so the strength is better than A1, but the internal structure of the chuck, in addition to a small part of the optional, most can only use the A1 type with the machine spindle end
D-type and the end of the machine with the end of the spindle rod, by the spindle end of the cam pin, it is another quick change chuck.
C-type and machine tool spindle end connection using bolt bolt fastening, it is a quick change chuck, can quickly loading and unloading.
Usually through the transition disk connection; short cone chuck with the machine tool spindle end directly connected, short cone chuck connection is divided into A1, A2, C, D four connection forms.
