Well, guess I have been doing things wrong. Just read that a 4-Jaw chuck is only used for turning eccentric things.

Below photo shows dialing in a barrel with an indicator. Yup, that is a 4-jaw chuck in the photo.

Maybe Jack Belk is willing to teach me the correct method??? Been wanting to take a trip to Idaho and look for a job, maybe Jack needs an apprentice. I can sweep floors pretty good, even have a hand made real straw broom and two custom made dustpans.

Next photo will show turning a taper the wrong way, as soon as I can find the diskette.



[ 10-13-2002, 01:54: Message edited by: John Ricks ]

Must be John. I must be getting taught wrong awell.

Kristofer

[ 10-13-2002, 03:06: Message edited by: KBGuns ]

John Ricks, perhaps you did not READ this part of that post.

Originally posted by Axel on "Troll Exposed!!" thread:
So if you are chambering and wish to be concentric to the bore I can agree that a 4 jaw chuck would allow you to accomplish this if you are chambering in the headstock and using an expanding collet / gage rod projecting from the rifle's bore to allow "sweeping" in of the work piece and setting of the 4 jaw chuck.

I have also said there are more than one way to machine something. If you actually believe that Robgunbuilder machined a taper onto a rifle barrel in a Hardinge tool lathe with only 18" between centers, well I just don't know what to say! John are you familiar with GD&T? If so, what do you target as your projected true positional tolerance of you chamber shoulder?

Axel