- Joined
- Dec 23, 2022
- Messages
- 10
I recently had the need to turn a part between centers (first time for me). I have limited tooling so thought it would be a good opportunity to make a spindle adapter for my Logan 11" lathe. I used 8620 steel, I don't have plans to heat treat and grind it but maybe I could in the future. From my research the spindle taper is 3.75° from center. I used a piece of scrap to make a temporary dead center in the chuck and offset the tailstock to give me the correct taper. I blued the spindle bore and got decent contact from what it looks like, mainly in the middle. I'll hand file and polish until I get a good fit. Then I'll either turn a 60° point on the other end to act as a center (easier) or bore an MT2 hole to use an off the shelf dead center.
Any thoughts on this?
Also, I was running at 270rpm and only taking off .005-.010 doc. It seemed to cut fine but I don't know the limitations of turning between centers? Is there a reduced feed/speed/doc I should be using? Or other safety precautions?
Annoying thing I noticed is that both my temporary dead center in the chuck and live center in the TS were getting chewed up. I'm assuming because of the TS offset causing the centerdrill hole to cut into them. Am I doing something wrong with this?
Any thoughts on this?
Also, I was running at 270rpm and only taking off .005-.010 doc. It seemed to cut fine but I don't know the limitations of turning between centers? Is there a reduced feed/speed/doc I should be using? Or other safety precautions?
Annoying thing I noticed is that both my temporary dead center in the chuck and live center in the TS were getting chewed up. I'm assuming because of the TS offset causing the centerdrill hole to cut into them. Am I doing something wrong with this?