Larry Gottlieb
Member
I received new mandrels that I had ordered and wished to check the runout.
I mounted them in the 1/4" collet chuck and using a dial indicator was dismayed to find the runout in the center of the mandrels was from .005 to over .01 inches.
My old mandrel in the past was about .003.
I routinely hold the mandrel in a center drill driver on a #2 MT.I had been told that the drill driver was a very accurate way to hold mandrels.
I then checked the new mandrels in that drill driver and they all tested from .003 to .005 which I find acceptable.
Now I have to figure what my problem is with my collet chuck.
Larry
I mounted them in the 1/4" collet chuck and using a dial indicator was dismayed to find the runout in the center of the mandrels was from .005 to over .01 inches.
My old mandrel in the past was about .003.
I routinely hold the mandrel in a center drill driver on a #2 MT.I had been told that the drill driver was a very accurate way to hold mandrels.
I then checked the new mandrels in that drill driver and they all tested from .003 to .005 which I find acceptable.
Now I have to figure what my problem is with my collet chuck.
Larry