- Joined
- Jul 29, 2013
- Messages
- 54
I have a mid-80’s vintage floor model Craftsman 113.213850 drill press that I bought new back in the day. It has always had quite a bit of TIR on the chuck but I just accepted it. After reading some posts on this forum I got inspired and thought it was time for a new chuck.
The drill press takes a JT33 chuck with locking collar. Not a lot of choices for JT33 with locking collar but I found a Jacobs brand 34-33C and just tried it out.
First, using a dial gauge I checked the arbor without the drill chuck mounted and the TIR is nearly 0. I had to check to make sure I was making contact as there was virtually no movement of the needle on the dial gauge. With the new chuck, the lowest I can get is 0.007 at the body of the chuck and about 0.012 at the base of a drill bit. This isn’t much better than my old chuck.
What kind of runout should I expect from a new name brand drill chuck?
The drill press takes a JT33 chuck with locking collar. Not a lot of choices for JT33 with locking collar but I found a Jacobs brand 34-33C and just tried it out.
First, using a dial gauge I checked the arbor without the drill chuck mounted and the TIR is nearly 0. I had to check to make sure I was making contact as there was virtually no movement of the needle on the dial gauge. With the new chuck, the lowest I can get is 0.007 at the body of the chuck and about 0.012 at the base of a drill bit. This isn’t much better than my old chuck.
What kind of runout should I expect from a new name brand drill chuck?