Thread: Drawbar not drawing straight :(
3rd Nov 2019, 06:40 PM #1Most Valued Member
- Join Date
- Aug 2015
Drawbar not drawing straight :(
If I mount my MT5-ER32 collet chuck in my lathe by just bashing the face with a hammer and a block of wood, I get 0.02mm runout on the inside face of the taper for the collet. However if I fit my drawbar first and use it to draw the chuck in and tighten it, I get 0.05mm runout.
So if I want the best precision, it seems I'm best off hammering the chuck in place first, then securing it with the drawbar. Does this sound normal, or am I not tightening the drawbar enough, or is my drawbar not pulling straight?
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