er40 collet chuck dimensions

[scrapcan]

I am interested in information on making an er40 collet chuck or buying one that will use a ready made collet nut. I want it to be direct spindle mount and will be threaded to fit spindle of Heavy 10 (2.25x8tpi).

Anyone have a link or instructions on what the internal dimensions and external thread should look like? Alink to a seller?

I have been searching but not coming up with the for dummies info I need.

something on the order of this





http://www.chronos.ltd.uk/acatalog/info_BFC1.html

[SPRINGFIELDM141972]

Not er40 but designed for the southbend.

http://brassandtool.com/Chucks-Collet.html

Just released, this BISON 5-C Direct Mount Collet Chuck is perfectly suited to the South Bend, Atlas and comparable lathes.
No more time and frustration mounting the regular model on it's respective adapter plate. You can be up and running within minutes after receiving your "NEW" direct mount chuck. Threaded and Camlock models available.

5-C Collets Chucks are designed for use with all 5-C Collets. They can be used for turning, facing, boring, grinding and milling operations on center lathes and grinding machines. The simple key operated scroll provides a uniform, distortion free clamping of workpieces and low collet exchange times. Their simple design, rugged construction and fine workmanship assures high quality and long service life.

[scrapcan]

Did you see the price of the bison chuck? The chuck costs what I paid for my lathe, I am not sure if my financial planner would go for that.

I have 5c capability as I just found a spindle adapter, spanner, and handwheel collet closer/drawbar that I could afford. I just need to make the thread protector for it and get some 5c collets.

The price on er40 or er32 collets is dirt cheap and I thought it would be a good way to go as I am told they have a greater range of clamping ability compared to 5c, that measn one would not need as many.

[SPRINGFIELDM141972]

Yeah I saw the price and figured it wouldn't be a problem for a rich fella like yourself.:bigsmyl2:

[scb]

Try this for dimensions. Seems to have them all. I've used these at work and they seem to be right on.
http://www.takayama-shoji.co.jp/rego/pdf/13_technical_information.pdf

[scrapcan]

Well now, if you think I am rich guy, I have some stuff to sell you. And I will tell you it is just brand new stuff I could not live without and just had to spend money on it! But if you would just take that big old spindle nose chuck off my hands, I would bet I could afford to buy that bison chuck!

I will not put pictures of the heavy 10 up because I can't even afford the green and yellow paint todo a refurb. Do you have spare paint?

On a more serious note, I woud llike to try the er40 collets due the the cost and flexability of their use over a wider range of sizes than the 5c collets.

With the info given, maybe I can fab together an er40 collet chuck. It woudl be nice if I could get the basic unit with the nut and thread for it and I could fit it to the lathe spindle.

[deltaenterprizes]

CDCO has a 5C chuck at a great price. I needed to recut the internal taper after I got it mounted to the back plate but for $139 it worth the time. I get .0005'' runout with it.
The 5c hex and square block set work well for one off projects and only run about $35.

[scrapcan]

Delta,

Did you have to recut he taper to get it to run tru or due to it being machined incorrectly for the collet seat?

I don't need a 5c chuck any longer as I have a handwheel closer and spindle adapter in transit. But I still ike the idea of the spindle nose closer instead of using a drawbar. But with the drawbar one should not have issues with chuck unscrewing if running in reverse.

Thanks for the comments.

[scrapcan]

Also if one of you has a few spare 5c round collets (1/2, 5/8, 3/4, 1 inch) I would like to trade something for them.

I will keep the 5c setup also, but the er40 look like it might keep one from having to have a cabinet full of collets.

[lathesmith]

manley, I got one of these ER32 setups for my lathe from this place:
http://www.arceurotrade.co.uk/Catalogue/Collets/ER-Collets-Collet-Chucks/ER32-Collets-Collet-Chucks/ER32-Lathe-Collet-Chucks/ER32-Lathe-Collet-Chuck---125mm-Dia

All you need with one of these is the right backing plate, which is far easier to make than the whole chuck. This setup works so well, I have one for my 13x lathe also.

This is actually a pretty decent setup, and is reasonably accurate. The thing I don't like about 5C chucks: they stick out too far, this can be a problem when parting and other things.

Your in-spindle 5C setup ought to be pretty good, although it can be a bit clumsy and slow to switch between chucks and collets. Always something, I guess....

lathesmith

[Dutchman]

hi Jeremy

You'll probably have to buy a chuck backing plate for your spindle nose and attach the chuck to that. I'm in the same boat with my D1-4 spindle and wood lathe 1"-8 spindle. I want them both ER40 capable.


Yep, they have an ER40 chuck for 1 1/2-8. No details or price...
(you'd have to adapt to your spindle nose)
http://www.tallgrasstools.com/ER-32ColletKit.html

ER40 RH Collet Nut - D: 63mm, B: 26.0mm, M: M50 x 1.5, Wrench: 04617,
*Max Torque: 140 ft/lbs

that's the thread: M50x1.5mm

ER40 collet:
Length 46mm
Diameter, major: 40.8mm
body angle: 8 degrees
nose angle: 30 degrees

http://www.rego-fix.com/catalog/pdf/13-techinfo.pdf

http://www.workholding.com/Pg30_ERCollets.pdf

http://www.workholding.com/techpwrctnt.htm

there is a 2 1/4-8 adaptor
http://www.workholding.com/PDF/WORKHOLDING.PDF



Dutch

[lathesmith]

The ER32 setup on my lathes is a pass-through design, which I prefer because I use quite a bit of longer stock. If you are finishing short parts, I guess the drawbar setup could work well, if you need to rig a stop to hold each part at the same depth.

lathesmith

[scrapcan]

Thanks guys I appreciate the help and info.

I looked at arceuro and tallgrass and will keep both in mind. I am not sure if I want to try to make one or buy one. One part of me says what the heck more parts in the scrap box is not a bad thing, at least I will learn to do stuff even if it does not do as intended. The other side says just buy it and then learn to screwup smaller stuff.

But I appreciate the help.

[PatMarlin]

What's the largest diameter that an ER40 will hold?

[Buckshot]

What's the largest diameter that an ER40 will hold?

...........The largest listed size for an ER40 is 1" but will effectively hold 1.023". ER50's go to 1.339". I bought a MT3 spindle nose adaptor for my 11" Logan and bought ER32 and ER 40 MT3 collet chucks. But since they're retained by a drawbar I can't use long stock like I can with the 5C's, however ER's have a much wider effective clamping range for collet to collet listed size then the 5C's, which make them handy to have.

It's a good idea to have a fixture to hold the collet chuck while you tighten the nut. The tighter it is the closer the tool you've loaded in it will run to it's minimum TIR, and the best wrench is the hoop type that fits 360* around the nut vs the spanner type.

.............Buckshot

[PatMarlin]

I don't know anything about the ER's accept they hold better and are springier than 5C's.

I've got a couple of situations where I need to hold threaded pieces for second operations, and I've been using a 3-jaw 5C collet chuck.

I crashed my good one and it's out .008 now, and I ordered another one that was supposed to be within .001- well it wasn't- .005 even after cleaning. I sent it back and they are sending me another one, but I'm not holding my breath.

5C collets do not hold these threaded parts well consistantly. Even getting a size that is close and tight as possible, and a good US made brand.

Who sells what I need to get a setup for my Hardinge?