DIYbanter - View Single Post

wrote:

What are 5c collet block chucks and how are they used with a lathe?

There are several different styles, but for the lathe you would want the
round type. They are normally held in a 4jaw chuck or in a 3jaw with
soft jaws that you would bore to fit. Some have a screw on the front
side to release the collet or a nut on the back that has to be accessed
from the back of the lathe throught the spindle, or taken out of the
chuck to get at. I have seen set-ups where the part is held in the
collet chuck off center and then put in the lathe to machine an
eccentric. We used them to hold small parts or round bar that would be
a pain in a larger chuck and allowed us to dial them in perfect in the 4jaw.