IndyMachinist
Plastic
- Joined
- Dec 20, 2011
- Location
- Indianapolis, IN
Turning a shaft roughly 8" long with 8 different diameters. I put the part between centers and check T.I.R. On the diameters closet to the centers I am .0002 T.I.R and on the other I am .0003 T.I.R. On the diameters in between I am as much as .004 T.I.R.. Arrrrgggh
Process, turning one side with jaws bored to stock material size. Then turning it around and locking up a diameter that is 2 inches long with a precision ground, hardened collet for that specific diameter.
I previously ran 450 parts that were great. Literally all I did was shut the machines off and came back to them a few days later later. No changes in tooling, speeds, feeds, nothing.
Diameters are great as for holding size and staying round.
Very confused.
Process, turning one side with jaws bored to stock material size. Then turning it around and locking up a diameter that is 2 inches long with a precision ground, hardened collet for that specific diameter.
I previously ran 450 parts that were great. Literally all I did was shut the machines off and came back to them a few days later later. No changes in tooling, speeds, feeds, nothing.
Diameters are great as for holding size and staying round.
Very confused.