- Joined
- Apr 12, 2013
- Messages
- 562
I am getting a chatter pattern in my internal threads. This is a brand new threading bar:
http://www.precisionmatthews.com/shop/12-internalexternal-threading-tool-set/
The threads have the classic chatter pattern, constant wavy pattern in the sides of the threads. 2024-t3 aluminum tube. Internal 28 tpi threads. I notice the support under the threading insert appears to be rubbing. Maybe it is oversize and needs to be ground down a bit? I have tried tap magic for aluminum and dark threading oil for cutting oils. I have sped up and slowed down. I have adjusted height. I have put a steady rest right at the end of my tube to support it. I'm out of ideas...suggestions?
http://www.precisionmatthews.com/shop/12-internalexternal-threading-tool-set/
The threads have the classic chatter pattern, constant wavy pattern in the sides of the threads. 2024-t3 aluminum tube. Internal 28 tpi threads. I notice the support under the threading insert appears to be rubbing. Maybe it is oversize and needs to be ground down a bit? I have tried tap magic for aluminum and dark threading oil for cutting oils. I have sped up and slowed down. I have adjusted height. I have put a steady rest right at the end of my tube to support it. I'm out of ideas...suggestions?