I have been given a collet chuck for my lathe which has a different type of collect to most I have found. The collets are similar to a 5c collets except they have a thread of 12TPI at the base, are 1.25in dia over the thread. They are 3.43 in long and have a fromt diameter of1.5in.
Could someone help with an identification of the type and, if anyone has any they want to sell, could you let me know. I am after 1/16 to 11/2 collets as time and pocket permit!!