- Joined
- Jun 15, 2017
- Messages
- 525
I have a GMC 9x49 mill with variable speed. I had to lower the head in order to move the mill. After I did this, a steel ring fell out of the top spindle hole where the drawbar lives. It fits the drawbar precisely. It's not a flat washer. It's maybe 3/16" thick.
Before I spend all day poring over confusing parts diagrams, can someone tell me what this ring is and whether I need it?
I'm on my second drawbar. For all I know, this thing was somehow related to the original bar. I had to get a new drawbar because the shear pin in the old bar went. Since then, I have installed a new pin, but I'm still using what I think is a Jet drawbar.
The mill has made some hooting noises at high speed since the drawbars were swapped, and I am wondering if an unnecessary spacer ring could have something to do with that.
The best parts diagram I've found is from Hardinge, and it shows a "washer" on the Bridgeport's drawbar, but this is a fat ring.
Before I spend all day poring over confusing parts diagrams, can someone tell me what this ring is and whether I need it?
I'm on my second drawbar. For all I know, this thing was somehow related to the original bar. I had to get a new drawbar because the shear pin in the old bar went. Since then, I have installed a new pin, but I'm still using what I think is a Jet drawbar.
The mill has made some hooting noises at high speed since the drawbars were swapped, and I am wondering if an unnecessary spacer ring could have something to do with that.
The best parts diagram I've found is from Hardinge, and it shows a "washer" on the Bridgeport's drawbar, but this is a fat ring.