I started from scratch on my lathe by
1. leveling with my machinist level.
2. realign the headstock and verified the cut of the rod to be within .0005.
3. Removed the jaws and ground out the rear 2 teeth.
4. Placed a 1.25” piece of rod in the rear of the chuck and tightened the jaws down.
5. I used a carbide insert boring bar and 1200 RPM with the carriage feed toward the tailstock and did a number of finish passes until the jaws were nice and shiny.
But when I put an indicator at the headstock on the .750” drill rod I used for indicating, it is +/- .001(.002 difference)and 12” toward the tailstock it is +/-.006(.012 difference)
What am I missing and why is it wobbling?
Thanks in advance
1. leveling with my machinist level.
2. realign the headstock and verified the cut of the rod to be within .0005.
3. Removed the jaws and ground out the rear 2 teeth.
4. Placed a 1.25” piece of rod in the rear of the chuck and tightened the jaws down.
5. I used a carbide insert boring bar and 1200 RPM with the carriage feed toward the tailstock and did a number of finish passes until the jaws were nice and shiny.
But when I put an indicator at the headstock on the .750” drill rod I used for indicating, it is +/- .001(.002 difference)and 12” toward the tailstock it is +/-.006(.012 difference)
What am I missing and why is it wobbling?
Thanks in advance