54 Draw bar 2007/10/01

A very simple project.

1. I've purchased a straight collet   milling holder which has a MT3 taper.
It came without a draw bar, so I made one as shown below.

2. The draw bar threads are inch pitch and were cut on the lathe.  The material is mild steel.
3. The draw bar consists of three parts because I didn't  have long enough material on hand.  

Also, it is difficult to machine a complete hex length.

4. The head of the bolt should be formed  as shown  because the bolt is  hit with a hammer to remove the  holder  from the milling machine.
5. The three parts are assembled  with LOCTITE No.271.
6. The finished draw bar.