Everything You Need To Know To Find The Best 5 Jaw Power Chuck

lucky7 said:

I'd suggest making a pseudo 5jaw on a faceplate. Easy enough to bolt on any desired number of sliders/jaws that will fit.

Lucky7

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That's the alternate. I figured by the time I modified our face plate and, bought individual sliders, and made sure they were all set up correctly I would be ahead just buying one. This depends of course how much it runs over the cost of a new 4 jaw.

Billtodd said:

<snip> It would not be too difficult to make a 5j independent , just start with available spare jaws and screws make the body solid steel (add lightening holes later) , as long as you're using moderate rpms strength shouldn't ba a problem.

Bill

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Also possible, but as this lathe and a worn Bridgeport are our main tools (and no formal machinists on staff) I think we're better off letting the experts do this one. If I go for shop made it will be clamping jaws to a faceplate.

JRIowa said:

As far as in independent goes, Try H&R out of Texas. They made all steel boring mill jaws for 2, 60" Grays for me. Don't worry, they won't be cheap.
H&r Mfg. And Supply, Inc., Er Collet Chucks and Tg100 Collets
JR

it used to be that 5 jaw chuck were a combination of a 2-jaw and a 3-jaw scroll chucks. We had a bunch of Cushmans like that.As far as in independent goes, Try H&R out of Texas. They made all steel boring mill jaws for 2, 60" Grays for me. Don't worry, they won't be cheap.JR

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Will check in to them, thank you. Are they going to make PB look cheap like WallyWorld?

thermite said:

I'd have thought Schunk, Kitegawa, Samchully/Samwoo, SMTmonobloc, Leader, or half a dozen other of the usual power chuck makers would be your go-to for such parts?

Very precise repeatability. Optional top jaws with independent adjustment.

Tooling a sub-plate on faceplate if low-volume /R&D / prototyping. Plenty of individual stock jaw assemblies around. Goods made for mills among them.

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Thank you

Limy Sami said:

Just out of interest, how many do you call a few microns ?

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I tend to call a couple 2, and a few 3-4. By the time you add a couple microns of deflection from clamping loads as well as the few we get from spindle runout (which fortunately seems to minimize its self for light cuts) I end up at my actual tolerance.

digger doug said:

I would give this a long hard think.

How are you proposing to dial in the part ?

Loosen which jaw, opposite of the high spot to push
down the high jaw ?

And not drop the part on the ways every time ?

For more information, please visit hydraulic chuck for lathe.

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Usually snug one side a bit more then loosen the other a bit after to avoid dropping the part. We're already doing this for other parts, it's just a headache for the 5 sided ones.

Limy Sami said:

If the OP must use 5 jaws then I'd be looking at putting said chuck on an adjust true type backing plate ...........but I'd far sooner look at custom jaws in a 3 jaw and put that and an adjust true back plate, cos that 5 jaw is going to be $

I can only agree Doug, .....night mare in the making, and that's without the risk of distorting the part .If the OP must use 5 jaws then I'd be looking at putting said chuck on an adjust true type backing plate ...........but I'd far sooner look at custom jaws in a 3 jaw and put that and an adjust true back plate, cos that 5 jaw is going to be

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We've made a ring to slip past parts in to, but every time the diameter changes (pretty much every project) we end up having to make a new ring to hold it and clamp on. I think long term a 5 sided fixture will save time.

thermite said:

ISTR meant to be a self-lubricating interference fit. Positive-flow lubrication driven off a reciprocating single-piston type hydraulic pump. Second piston has to take a back seat, too much lubrication almost enough, third one goes to the head of the line, host system lubricated, claw-type chuck jaws, retracted position. Third and forth pistons pumps manually operated, lubricants optional.

You in Denver this week?

Or someplace in Californicyah at a Wesson-Oil party?

Relying too much on my memory, young'un.ISTR meant to be a self-lubricating interference fit. Positive-flow lubrication driven off a reciprocating single-piston type hydraulic pump. Second piston has to take a back seat, too much lubrication almost enough, third one goes to the head of the line, host system lubricated, claw-type chuck jaws, retracted position. Third and forth pistons pumps manually operated, lubricants optional.You in Denver this week?Or someplace in Californicyah at a Wesson-Oil party?

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Made my day, thank you.


Will check there as well if I don't find what I'm looking for in the options above, thank you.

That's the alternate. I figured by the time I modified our face plate and, bought individual sliders, and made sure they were all set up correctly I would be ahead just buying one. This depends of course how much it runs over the cost of a new 4 jaw.Also possible, but as this lathe and a worn Bridgeport are our main tools (and no formal machinists on staff) I think we're better off letting the experts do this one. If I go for shop made it will be clamping jaws to a faceplate.Will check in to them, thank you. Are they going to make PB look cheap like WallyWorld?Thank youI tend to call a couple 2, and a few 3-4. By the time you add a couple microns of deflection from clamping loads as well as the few we get from spindle runout (which fortunately seems to minimize its self for light cuts) I end up at my actual tolerance.Usually snug one side a bit more then loosen the other a bit after to avoid dropping the part. We're already doing this for other parts, it's just a headache for the 5 sided ones.We've made a ring to slip past parts in to, but every time the diameter changes (pretty much every project) we end up having to make a new ring to hold it and clamp on. I think long term a 5 sided fixture will save time.Made my day, thank you.Will check there as well if I don't find what I'm looking for in the options above, thank you.

Post by wildcard » Fri Sep 18, 6:31 am

A few other things you might consider.
Amazon sells the none T/N version of the barracuda 2 chuck just search for the CSCC and it is $168 with free shipping, it comes with just about everything that the T/N version does, except no bowl jaws, however you can get the jumbo bowl jaws from amazon as well CJAWFJ2 and they are $25, also with free shipping, then all you need is the adapter L $17 also with free shipping, those prices are lower by in some cases as much as $10 over what Penn state industries sells them for, and here is the funny part, on amazon the vendor is PSI, so you are still getting it from the same place, your just paying less for it.

Mabey someone with a PSI chuck can answer this question, but there is one other thing to consider, the jumbo jaws are 8" does that mean that the largest item you can turn is 8" or are the jaws themselves 8" and with the chuck you can turn soemthing up to like 12-14"

Cause i also found a nova g3 chuck, you can find it on amazon as well as looking up the actuall vendor for it and you go to woodworker specialties, there website is basically just a bunch of links to an ebay store, but they sell the nova g3 with 2" jaws only and it includes the corrected adapter for the shopsmith (you just have to tell them what adapter you need) and it has free shipping for $125, then you can get the bowl jaws from them also for $65, you wont get as much for your money because you dont get all of those jaws that the PSI chucks come with, but the nova chuck has allot more options for jaws in the long run, they even have what they call soft jaws, you can find them at woodcraft, and you can cut them to whatever shape you need them to be, not to mention that they make a ton of jaws for the nova chucks, and all of the nova jaws work on almost all of the nova chucks if you want to find out more about them look up teknatool lots of reading.

The only down side is, the extra nova jaws are about $30-80 each depending on what you get.

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