Adjustable 3 jaw chuck

Set Tru chuck

Rob,
You are right about the chuck. Don't know about the 3 jaw plain scroll being made adjustable but I bored my face plate and put a spider into it with the 4 adjustment screws and it works fine. It also shortens up the distance through the spindle so I can handle a 20in barrel. You will never regret getting a set tru type chuck. Dale
 

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Gents,

So would it be safe to say for doing BARREL WORK, a 6-jaw set-thru offers no advantages over a 3-jaw set-thru?

I have a 8" 6-jaw set-thru on my big lathe and love it, and will be setting up my new, smaller lathe with a 6" set-thru. If the 6-jaw doesn't offer any advantages over the 3-jaw, why shell out the extra coin for it?

Justin
 
I stand corrected, thanks Jackie, what I stated was how I was taught. Learn something new everyday.
 
I am not convinced I am helping or hurting this conversation, however as a newbie at this I found Buck's written help to be valuable.

http://www.buckchuckusa.com/userfiles/How to Mount and Operate(2).pdf

If your chuck or work-holder cannot precisely hold your work, then would it not be reasonable to assume your lathe has little chance of making a precise cut?

Wally

P.S. I would love to follow Jackie Schmidt around for a day or two...or three...or six...
 
Chucks

We just bought a new 28 inch swing x 24 ft bed Kingston Lathe. It came without a chuck. The Cushman 1016 series heavy duty 4-Jaw we bought for it cost $8500.

That thing is made for serious use only...........jackie
 
jackie schmidt said:
The Cushman 1016 series heavy duty 4-Jaw we bought for it cost $8500.

That thing is made for serious use only...........jackie
Click to expand...

Jackie,

Outfitting a lathe is a challenge for a finnikin like me...I have purchased some "great deals" that "saved me" some "real money." Some purchases have worked out well and others, well they have a special place for them.

From eBay many moons ago, I purchased a Buck 6 jaw and cleaned it up. Again, for a newbie, it was educational to take something like this apart, see somewhat how it works and try and get it back together.

Before a heavy duty money purchase like a Buck Chuck (a real one) there should be a simple list of questions to ask, like:
- what kind of TIR will it hold? (not considering the spindle run-out...)
- does it appear to have been beat on? (all the war stories I have read, both of mine loosen with a casual tap of a rawhide hammer)
- has the chuck been in your shop since new?
- how would you rate the precision characteristics of this chuck?

Jackie, step in at this point and give us/me more questions to ask to lessen the probability of steppin in the pooo.

Wally
 
It take me about 10 minutes to get the 4 jaw dialled in...
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I wish I could charge for 10 minutes to just dial in a barrel. With my Set-Tru six jaw I can dial in a barrel in under one minute. And I'm sure the barrel is held steady and tight with equal pressure.

Some things just don't make sense not to upgrade to and a four jaw is just plain slow and not as effective as a Set-Tru type chuck

P6300004-vi.jpg
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Sounds like some (based on comments) do not worry about coaxial alignment of the lathe spindle and the bore axis. An "Adjust-Tru" / "Set-Tru" chuck, only adjusts for concentric run out.
 
jackie schmidt said:
We just bought a new 28 inch swing x 24 ft bed Kingston Lathe. It came without a chuck. The Cushman 1016 series heavy duty 4-Jaw we bought for it cost $8500.

That thing is made for serious use only...........jackie
Click to expand...

hehehehe oh yeah!! Jackie there's nothing i love more than to see the swarf fly.... We have an old chinese 70's vintage 30" x 20' in our workshop.. I love to get the old girl wound up with a 10mm depth of cut and a heavy feed rate and just stand back and let her go!!! You pretty much need an armour plated umbrella so survive the bombardment of swarf...

Cheers
Leeroy
 
TRA said:
Sounds like some (based on comments) do not worry about coaxial alignment of the lathe spindle and the bore axis. An "Adjust-Tru" / "Set-Tru" chuck, only adjusts for concentric run out.
Click to expand...

TRA good observation. If you are going to ream ream a die conical runout is another concern. If you have any ideas on how to deal with it I would be interested.
 
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