- Joined
- Jul 2, 2014
- Messages
- 7,594
Make sure your drawbar and collets turn freely on each other, clean the threads with a tap and die if necessary. Also make sure that the drawbar is not bottoming out in the collets and other tools. If it does, shorten the drawbar or add a spacer washer to the drawbar. I get 1" of engagement with my drawbar, which is about the limit without starting to get tight in the collets. Some prefer less thread engagement for quicker tool changes. I would not use less that double the drawbar diameter thread engagement, which might stretch the threads. A drawbar needs to be made of good metal, and preferably hardened, or it will be a constant nuisance. When it is working correctly you should be able to screw the drawbar to the collet easily with your fingers, only using the wrench after all the slack is out.