Reply To: Lathe Collets. What should I buy to start with? Home › Forums › General Discussion Forum › Lathe Collets. What should I buy to start with? › Reply To: Lathe Collets. What should I buy to start with? June 26, 2012 at 1:08 pm #51928 Bob TascioneModerator Hi James, I just checked and yes 3/16 is correct. Bob