PSI Collets

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Simplex

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Does anyone know where I could find a 1" collet that fits the PSI collet/chuck system? The largest collet that comes with the kit is only 3/4". Thanks.
 
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The largest size I have found is a 51/64. I got it from ebay, but not 800watt, I dont remember who it was, I just did a search. It fits the 20mm Alt blanks from Exotic Blanks perfectly. It has really improved my drilling.
 
I'm going through the exercise right now of deciding on an ER32 or ER40 collet chuck so have spent the last couple days looking at a lot of information. A couple machinist sites pointed to looking at www.rego-fix.com as a good source of information on the ER system. According to their catalog, they make a 13/16" collet for ER32 but that's the largest size. To go to a 1" collet you would need an ER40 chuck.
 
MyKidsDad said:
I'm going through the exercise right now of deciding on an ER32 or ER40 collet chuck so have spent the last couple days looking at a lot of information. A couple machinist sites pointed to looking at www.rego-fix.com as a good source of information on the ER system. According to their catalog, they make a 13/16" collet for ER32 but that's the largest size. To go to a 1" collet you would need an ER40 chuck.
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That info is correct as far as I have been able to find too, but keep in mind, the er32 chuck from psi or beale allows you to insert workpieces through the collet into the mt of your lathe, while a mt chuck will not, I am not aware of any er40 chuck that will attach to a wood lathe any way other than with the Morse Taper. If you find one, you are going to make a lot of people really jealous :-)
 
The main application that I've seen for these so far is drilling blanks. What else are you (or others) doing with them that the through capacity (as is allowed with the PSI or Bealle) is needed? From the specs that I can find, the ER32 collets are 1.5" deep and the ER40 collets are 1.8" deep so you could insert at least that much of a blank into an MT mounted collet chuck.
 
I have the PSI system and I got the 13/16 and the 20-19 mm collet's, and I use it for just about all of my drilling, I had to buy the extra two and I think I got them from 800 watt. To me they were well worth the money.
 
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I'd still like to hear from someone the advantage of using a chuck like the PSI or Bealle that threads onto the spindle versus a morris taper mounted chuck. I can see that it would me more accurate/stable to have it screwed onto the spindle but I'm having trouble seeing that the ability to put a blank all the way through into the headstock is a big advantage.
 
MyKidsDad said:
The main application that I've seen for these so far is drilling blanks. What else are you (or others) doing with them that the through capacity (as is allowed with the PSI or Bealle) is needed? From the specs that I can find, the ER32 collets are 1.5" deep and the ER40 collets are 1.8" deep so you could insert at least that much of a blank into an MT mounted collet chuck.
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I believe one of the main activities that these are used for is cutting threads for kitless pens. For cutting the internal threads, it is important for the outside of the blank to be supported as much as possible from the outside by the collet so it does not deform as the threads are cut. Also, when cutting the external threads, you want to be able to insert the body of the pen through the collet into the taper so that the end being threaded is just protruding from the face of the collet to minimize runout as the threads are cut.

That's just what I've heard, I don't do it myself yet.
 
MyKidsDad said:
I'd still like to hear from someone the advantage of using a chuck like the PSI or Bealle that threads onto the spindle versus a morris taper mounted chuck. I can see that it would me more accurate/stable to have it screwed onto the spindle but I'm having trouble seeing that the ability to put a blank all the way through into the headstock is a big advantage.
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First of all , it's "Morse taper" .
As James said , there are several advantages to being able to insert the blank almost all the way into the collet . When threading you do not want the blank sticking all the way out of the collet to minimize run out and to reduce the stresses on the blank .
I make complete pens and closed end pens using nothing but a collet chuck to hold the blank and will sometimes have most of the pen being held in the collet . I will put a taper on the ends of the pen and cannot hold the ends of the pen so I have to grip the center of the pen to turn the tapered ends .
There are other reasons why you would need the extra depth of a spindle mounted chuck , the only way to fully understand these reasons is to need them to perform a task that requires the ability . If you are only going to turn kit pens , the advantage is minimal but if you ever get to the point of making kitless pens the ability will be required .
 
Hey Eric -- If what you foresee in your future turning does not need the ability to have more depth, go ahead and get what ever -

I do some stuff other than pens and use the through capacity with the collet chucks (I have ER 16 and ER 32 capacity). I need the through chuck capacity to modify some kit pens.

And not to worry -- if you estimate wrong, you just get to purchase more gear later. It is nothing more serious than your best call of your future activities.

Which ever choice - you have a new learnig adventure and the challenge of making the gear and yourself work together for the outcomes desired.

It is not a right - wrong choice -- just shades of what might be most useful today and into the future.
 
KenV said:
Hey Eric -- If what you foresee in your future turning does not need the ability to have more depth, go ahead and get what ever -
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That was the trouble Ken. Up until this thread, I didn't know what might or might not need the ability to have more depth. I've never made a kitless pen but I might be interested in trying it in the future.

Thanks for all the input everyone. Looks like I have a little more thinking to do before I decide what to buy.

Oh, and Butch, I actually knew it was morse taper, just a case of the fingers moving faster than the brain.
 
Late brain storm (or brain fart - one never knows until later) -- Oneway does sell collets for the stronghold chuck that go up to 1 1/2 inches --

One needs the stronghold chuck (made for the bigger lathes) and the holder - and the appropriate jaws. These are not machinist adapted but are probably good for wood turning as is most Oneway stuff. But they do have 1 inch capacity (I did check).

Someday I may get a stronghold for the bucket of chucks -- but not anytime soon.
 
You might also check with the Little Machine Shop and see if their 5C collet chuck can be adapted to your lathe. I think the 5C collets go up to 1 1/8" in size. It is pricey, but the 5C sizes can be worth their weight in gold.
 
MyKidsDad said:
The main application that I've seen for these so far is drilling blanks. What else are you (or others) doing with them that the through capacity (as is allowed with the PSI or Bealle) is needed? From the specs that I can find, the ER32 collets are 1.5" deep and the ER40 collets are 1.8" deep so you could insert at least that much of a blank into an MT mounted collet chuck.
Click to expand...


Sometimes I am drilling 6 and 7 inch blanks and it would be nice to place the blank deeper into the chuck which I cannot do with my mt mounted collet chuck.
 
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