What are your opinions? I wouldn't do it that way on my rifles, but is probably good enought for him.http://www.practicalmachinist.com/vb/showthread.php?t=164205
Butch

Which method, the last one using the lathe dog to drive the reamer?

I got nothing from that address...

There's always been more than one way to skin a cat. I could use a set of those lathe dogs like that one around my shop.

I was speaking of the guy from Sweden. He really does have some nice equip. Too many operations that will allow tolerance stacking. I sure wouldn't use a Jacob's rubber flex collet to do the job. They are wonderful, but not up to chambering tolerance. Chambering that way without a cathead would allow the outboard end of the barrel to flop up and down.
Butch

I was going to say that I've used lathe dogs to drive chamber reamers for years.

I set up only once, from the brginning of the tenon to final polish of the chamber. I once, or, twice, I forget, left a barrel in my lathe for over a week waiting on a new throat reamer to replace the one that rolled off the top of the lathes splash guard and broke. I hate it when it does that!

quote:

Originally posted by Westpac:
I was going to say that I've used lathe dogs to drive chamber reamers for years.

I set up only once, from the brginning of the tenon to final polish of the chamber. I once, or, twice, I forget, left a barrel in my lathe for over a week waiting on a new throat reamer to replace the one that rolled off the top of the lathes splash guard and broke. I hate it when it does that!

That's why I have two lathes, oh, and I never pick up shop rags or newspaper from the floor, they help break the fall.

The lathe dog is a little un-handy for use as a reamer holder. The way he has the barrel held is a major problem for me. However, everyone has their own quality limits.

Well,another way to do it is to set the barrel vertical in your bench wise, and ream it by hand.
I have understood that many thinks of that as crazy and inaccurate, but I doubt any of them had tried
it that way. I have reamed chambers that way that produces 1/2moa groups with boring regularity, just as tight as any lathe reamed chamber. Oh, and is almost as fast as reaming in a lathe. But you might breake a sweat.

Driving a reamer by hand with a dog gives you much better feed back for the cutting load on the reamer. I would be a little nervous about the center jumping out of the reamer center and would probably use some other arrangement to capture the reamer shank on center.
Some of what is shown is more of a s stunt than practical- especially the helical interpolation of receiver threads. Yeah it works but getting a perfect set up with a mill is more difficult.
The mill will cut the receiver face out of square just as easily as not. The proper setup on a lathe will not cut it out of square.

It is not too cool to have a kid around an engine lathe especially without eye protection.
I have seen a few train wrecks. Even yawning can get you hurt....Try yawning during an interrupted cut. You never know where those chips are going.

Collets are handy for a lot of small work but a 4 jaw permits you to put the bore where you want it not where the collet puts it.