5c Collet Holder Rack System

mksj

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I got started collecting 5C collets about 2 years ago when I got my lathe with a 5C chuck. Had little experience with 5C and had been using an ER-32 system in my mill. So started out with a basic Lyndex 5C collet setup by 1/16th that I picked up on eBay.

After awhile, I started having issues with the limited clamping range of the 5c collets (i.e. nil), and so started collecting some more collets through the next year. Finally was able to get a full set of 1/64th collets. The problem has been where to store them, since I have very limited space and no more draws to stick them. Well, I ended up getting a rack for the outer cabinet on my lathe. First one, then a second, and finally a third (Enco sales). Of course every one would be slightly different and a different color. So cleaned them all up and sprayed them with some gunmetal colored spray paint, which was fairly close to my PM1340GT cabinet color, albeit the later is not metallic. Anyway with 3 racks fitting nicely on the outer side of the cabinet. I have been using a LatheMaster 5C tru-set chuck, which trued up fairly well, but the chuck body wobbled quite a bit. I ended up turning down the chuck outer body and D1-4 backing plate. Works OK, but pretty slow with the collet changes. The other drawback with the 5C collets is that even with a collet stop to position the work material, the Y axis position changes as you tighten down the work piece. I do not trust the reproducibility of turning multiple pieces by just using the stop. Might try an ER system down the line, as they seem to give a tighter hold the the 5C. Anyway, these are the 5C collets racks on my machine. The racks take up almost no space, and are handily available when I am using the lathe.

20151218_132549.jpg
 
A nice neat layout. I will have to travel that same path sooner or later.
 
(snip) The other drawback with the 5C collets is that even with a collet stop to position the work material, the Y axis position changes as you tighten down the work piece. I do not trust the reproducibility of turning multiple pieces by just using the stop
The Y axis position changes? The Y axis is up and down on a lathe. It sounds like you might be speaking of the Z axis, which is in and out of the spindle or collet?
 
Great idea. I have one of those collet racks. Tomorrow it will be mounted like yours is.
 
I have used 5c collets with a lever collet closer and repeatable was with in a couple tenths. With a scroll chuck if you are using ground stock it should still be less than .001
 
mksj,

Thanks for sharing your storage idea. I need all of those I can get!

-brino
 
Darn nice set up . The er40 collets can handle the off size better than the 5c . It is still a great set up.
 
The Y axis position changes? The Y axis is up and down on a lathe. It sounds like you might be speaking of the Z axis, which is in and out of the spindle or collet?
Wow, that's news to me. Lathes are generally XY machines unless they have active milling which can introduce Z or even A and B. Or at least that's what i've seen.

But then, i guess it doesn't really matter. A guy can set it up however it suits. If it's your shop and it works for you then there's no wrong answer.

Wrat
 
First off, what a slick setup.
Remember, imitation is the sincerest form of flattery. You're about to be flattered in many shops.

The other drawback with the 5C collets is that even with a collet stop to position the work material, the Y axis position changes as you tighten down the work piece. I do not trust the reproducibility of turning multiple pieces by just using the stop.
This I find odd.

Obviously, the collet draws in. And that can have the appearance of movement. But if it's truly moving, i don't think the problem is with the collet as it is with the stop. Many jillions of pieces have been successfully machined to exacting dims using a collet and stop. So the technique has a solid trustworthy track record. It's just a matter of (probably building) the right hardware.

Wrat
 
Wow, that's news to me. Lathes are generally XY machines unless they have active milling which can introduce Z or even A and B. Or at least that's what i've seen.

But then, i guess it doesn't really matter. A guy can set it up however it suits. If it's your shop and it works for you then there's no wrong answer.

Wrat
Z is always the axis in line with the spindle, on any machine. You can certainly call them anything you want in your shop, just please don't try to confuse us...
http://yarchive.net/metal/axis_naming.html
 
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