How concentric is the inside back plate mounting hole to the out side of the chuck body?
I made a new back plate for my new 4 jaw chuck.
The chuck fits tight enough that I need to tap it on with a rubber mallet.
When I check the chuck on the lathe with the back plate I get about .008" run out.
I double checked the lip on the back plate where the chuck seats an I get .000".
I measured the back plate seating area on the chuck to the outside and it is off in places about .003.
I made a new back plate for my new 4 jaw chuck.
The chuck fits tight enough that I need to tap it on with a rubber mallet.
When I check the chuck on the lathe with the back plate I get about .008" run out.
I double checked the lip on the back plate where the chuck seats an I get .000".
I measured the back plate seating area on the chuck to the outside and it is off in places about .003.