I've decided to make a collet chuck , haven't yet decided whether to
go ER32 or ER40 ... anybody got a link to plans ? I know some of the
dimensions and angles , but not exact diameters etc . This will be used
on my 10" Wards/Logan lathe for she small stuff , possibly up to an inch
or so .
--
Snag
Men don't protect women because they're weak .
We protect them because they're important .

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On 10/12/2023 23:51, Snag wrote:

I've decided to make a collet chuck , haven't yet decided whether to
go ER32 or ER40 ... anybody got a link to plans ? I know some of the dimensions and angles , but not exact diameters etc . This will be
used on my 10" Wards/Logan lathe for she small stuff , possibly up to
an inch or so .

Is it worth making one when they're available fairly cheaply like https://www.arceurotrade.co.uk/Catalogue/Collets/ER-Lathe-Collet-Chucks/ER40-Lathe-Collet-Chucks
, that's a UK example but I expect you'll be able to find cheaper in the
US and then make an adaptor if one isn't available for your spindle
already. I've got 2 and they seem well made and accurate, one is on a
rotary table and the other currently unused as I found a similar item
but with a built in D1-4 camlock mount so bought that as it was cheaper
than buying a camlock mount and mating the 2 together.

For 1" stock you'll need ER40 as that goes up to 26mm diameter collets,
ER32 only goes to 20mm IIRC.

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On 12/10/2023 6:54 PM, Jim Wilkins wrote:

"Snag"  wrote in message news:ul5itg$2s0t2$1@dont-email.me...

  I've decided to make a collet chuck , haven't yet decided whether to
go ER32 or ER40 ... anybody got a link to plans ? I know some of the dimensions and angles , but not exact diameters etc . This will be used
on my 10" Wards/Logan lathe for she small stuff , possibly up to an inch
or so .
Snag
--------------------------------

So far I've been satisfied with 5C collets for fractional sized drill
rod and shafting stock and two 6-jaw chucks for other sizes.

This is the smaller one which is on their 5C fixture mount that can move
to collet blocks or an indexer to mill flats and keyways. https://littlemachineshop.com/products/product_view.php?ProductID=2276

The runout is near the max spec which hasn't caused difficulty, if I
need to turn both sides of a part I make some section of the first side
fit a 5C collet. The inside chucking ability is quite useful, it's still
set up to hold a freeze plug that I tapped for 1/4" pipe.

Though I have a good 5C set the only collet sizes I really need are for
my drill rod stock.

I can see ER collets for metric stock or chucking finished surfaces accurately, I just haven't needed to do that. If I did I could center an
ER chuck in a 4-jaw.

I have a couple of 5C collet blocks , and my shop made end mill
sharpening fixture also uses 5C collets . Maybe I will look into making
a drawbar fixture to put on the lathe instead of heading off into a new direction . I've not considered using the 5C collets before because I
hadn't figured a way to use them except in a chuck . I'm thinking
something like the ER but with a drawbar and a threaded plug in the
collet . It'll only be good for short stuff but ... it'll be repeatable
. I'll have to fill in my set of collets though .
--
Snag
Men don't protect women because they're weak .
We protect them because they're important .

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On 11/12/2023 12:27, Jim Wilkins wrote:

"Snag" wrote in message news:ul5siv$2t742$1@dont-email.me...

This one doesn't need a closer tube. They also have an ER40 adapter. https://www.amazon.com/Collet-Closer-Semi-finished-Adapter-Thread/dp/B07VDJM2WG?source=ps-sl-shoppingads-lpcontext&ref_=fplfs&smid=A30FABLYMW48NQ&th=1

The CME 6" 6-jaw chuck I bought was mostly satisfactory, except that
the top jaws fit their slots -very- tightly.

I would want to research that if looking at it seriously as I've heard
about variable quality and they normal move the collet to close it which
may or may not be an issue. I made a D1-4 mount for a Kalamazoo 5C
closer https://kalamazooind.com/products/5c-collet-fixtures/1cc-5c-collet-fixture-for-chucks/
and have been very happy with it, the collet is fixed and the sleeve
around it slides to close it so lengths are repeatable when using a stop
even if the stock size varies a bit..

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On 12/10/2023 7:36 PM, Snag wrote:

On 12/10/2023 6:54 PM, Jim Wilkins wrote:

"Snag"  wrote in message news:ul5itg$2s0t2$1@dont-email.me...

   I've decided to make a collet chuck , haven't yet decided whether to
go ER32 or ER40 ... anybody got a link to plans ? I know some of the
dimensions and angles , but not exact diameters etc . This will be used
on my 10" Wards/Logan lathe for she small stuff , possibly up to an inch
or so .
Snag
--------------------------------

So far I've been satisfied with 5C collets for fractional sized drill
rod and shafting stock and two 6-jaw chucks for other sizes.

This is the smaller one which is on their 5C fixture mount that can
move to collet blocks or an indexer to mill flats and keyways.
https://littlemachineshop.com/products/product_view.php?ProductID=2276

The runout is near the max spec which hasn't caused difficulty, if I
need to turn both sides of a part I make some section of the first
side fit a 5C collet. The inside chucking ability is quite useful,
it's still set up to hold a freeze plug that I tapped for 1/4" pipe.

Though I have a good 5C set the only collet sizes I really need are
for my drill rod stock.

I can see ER collets for metric stock or chucking finished surfaces
accurately, I just haven't needed to do that. If I did I could center
an ER chuck in a 4-jaw.

  I have a couple of 5C collet blocks , and my shop made end mill sharpening fixture also uses 5C collets . Maybe I will look into making
a drawbar fixture to put on the lathe instead of heading off into a new direction . I've not considered using the 5C collets before because I
hadn't figured a way to use them except in a chuck . I'm thinking
something like the ER but with a drawbar and a threaded plug in the
collet . It'll only be good for short stuff but ... it'll be repeatable
. I'll have to fill in my set of collets though .

The "best" way is in a native 5C spindle taper, but an adapter can be
purchased or made if the spindle bore is large enough. With care you can
get quite good results. If not 3C and 1A will fit in an adapter that
will fit in a spindle as small as 3MT.

I bought an import 5C chuck once, and it was pretty terrible. I sent it
back. I much prefer an adapter that fits in an internal spindle taper
if I can't have a native taper.



--
Bob La Londe
CNC Molds N Stuff


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