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ER40 collet chuck

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Dave Harding 109/09/2015 21:09:00
148 forum posts
4 photos

Hi I'm considering buying a ER40 collet chuck from Arc euro any one used one what is your opinion of the chuck. Are they worth the outlay.

John Rudd09/09/2015 21:14:06
1446 forum posts
9 photos

Gear from Arc is without doubt quality stuff....no connection etc.....

Just bear in mind collet chucks are for round stock....wink

I have ER32 collet chuck on my Sieg lathe...dont use much else on it....If I need to machine hex or square I use one of my other machines...unless they have a collet chuck on ....

Breva09/09/2015 22:40:44
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88 forum posts
7 photos

Dave ,

One advantage you might find with the ER40 is that you can often pick up cutters etc with thicker shafts from industry that are too big for people with smaller machinery. As a result there is less competition for them at auction.

I use one on my mill. Got my from Amadeal and have had no problems at all. I would suggest you get the ballbearing losing nut as opposed to the standard one. It is much easier to bring up the required tightness. They need more pressure than you might think.

John

John Rudd09/09/2015 23:42:11
1446 forum posts
9 photos

Posted by Breva on 09/09/2015 22:

I would suggest you get the ballbearing losing nut as opposed to the standard one. It is much easier to bring up the required tightness. They need more pressure than you might think.

John

Well I have to disagree...I have Rheumatoid Arthritis and as such have less strength than most folk...I find using an 8 inch shifter and a collet spanner sufficient to tighten without causing cutter slip....in fact I find Jacobs style chucks less able to grip in some instances.

I guess it comes down to quality of collets etc...

(3p supplied...inflation...you know..)

Nick_G10/09/2015 00:39:39
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1808 forum posts
744 photos

.

I have an ER32 collet chuck from ARC mounted on a D1-3 plate and I use it quite a bit. Very close runout and I consider it to be a very good value for money item. The collets are very good at not leaving 'witness marks' on work already turned like a normal chuck does unless you use thin aluminium strips between the jaws and work.

I also have a morse taper collet chuck from them that takes a screw in tang that they also supply. I use that in the lathe tailstock increasingly. It seems 'truer' and more secure than a normal tailstock chuck.

Nick

Edited By Nick_G on 10/09/2015 00:43:24

Lambton10/09/2015 07:40:19
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694 forum posts
2 photos

I use ball bearing nuts for ER25 and ER30 collet chucks. They require less effort to get the proper grip on the work piece than a plain nut. The ones fro Arc are very good and only about £1.50 more than standard ones.

John, I suggest you try one as I am sure it would be of help to you.

Neil Wyatt10/09/2015 09:14:06
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Moderator
18894 forum posts
734 photos
80 articles

I use a collet spanner with a 4" bar, and that's probably the difference of using a ball-bearing nut.

Having gone to the bother of making and ER25 closing nut (complete with release collar - I had to grind four special HSS bits for 1/8" HSS!) the ball bearing ones are so cheap and so much better.

Neil

Vic10/09/2015 09:51:18
3014 forum posts
8 photos

ER32 is more popular than ER40 so consider that unless you really need the capacity of the ER40. You'll then be able to use the various ER32 fittings without having to buy another set of collets.

I have an ER32 "system" that includes Lathe and Milling machine chucks, various collet blocks and a Spin Indexer.

Ketan Swali10/09/2015 10:10:11
1400 forum posts
126 photos

The standard nut is fine for most applications. The ball bearing nut is better, requiring less force to tighten, when dealing with ER collets which hold smaller diameter of stock, or when dealing with stock held in a collet at the lower end of the collets capacity.

So, for example, an ER collet with capacity 5mm to 4mm, will be less elastic 'springy' then an ER collet with capacity 10mm to 9mm, because the smaller capacity collet has 'more metal' to force to close than the larger capacity collet.

Similarly, if a material diameter 9.2mm is held in a collet 10mm to 9mm, more force may be required to close the collet down to 9.2mm, as opposed to holding 9.8mm diameter stock in such a collet.

In both such cases, a nut with ball bearing seems to work better with less force applied. At least, this is the simple way I understand it.

Ketan at ARC.

KWIL10/09/2015 11:53:44
3477 forum posts
66 photos

I entirely agree with Ketan, the ball bearing nuts are a joy to use, especially when you are opening a collet at its lower diameter range.

Crocadillopig10/09/2015 12:44:57
30 forum posts
4 photos

I recently bought 10 x ER40 collets (17 to 26mm) and matching lathe chuck from ARC to augment my ER25 set (goes down to 0.5mm) and use them in both my mill for cutter and drill holding, and in my lathe for barstock holding. I wouldn't be without them. I use a ball bearing nut for the ER25's and would endorse Ketan's Comments.

Russ

jim'10/09/2015 16:37:46
72 forum posts
6 photos

The bearing type nut is excellent. **LINK**

I have not had to resort to using the spanner yet, even on 1 1/2" stainless bar.

So much better than three jaw

pgk pgk10/09/2015 18:33:53
2425 forum posts
293 photos

When the penny finally dropped in my brain and I realised that i could shove my mills ER32 MT3 collet holder into the 5-3MT adapter and shove that in my crusader lathe I've been using it quite a bit.

The only downside to the MT holder system is limited insertion distance.

I didn't know ER40 went as big as 1 and 1/2 inches? Can i also ask which collet chuck you sourced to fit the crusader?

jim'10/09/2015 19:02:53
72 forum posts
6 photos
Posted by pgk pgk on 10/09/2015 18:33:53:

When the penny finally dropped in my brain and I realised that i could shove my mills ER32 MT3 collet holder into the 5-3MT adapter and shove that in my crusader lathe I've been using it quite a bit.

The only downside to the MT holder system is limited insertion distance.

I didn't know ER40 went as big as 1 and 1/2 inches? Can i also ask which collet chuck you sourced to fit the crusader?

1 1/2" is a bit big!!

The job was some 30mm 304 stainless.

I think i got the chuck from Gloster tooling on ebay.

Dave Harding 115/09/2015 23:47:39
148 forum posts
4 photos

I ordered one from Chester tools unfortunately they sent me the wrong size so it needs to go back.

Dave Harding 116/09/2015 00:30:44
148 forum posts
4 photos

Its cost me £7.50 to return it to them so a expensive chuck I have crossed them off my list. wont be using them again.

Dave Harding 119/09/2015 09:36:32
148 forum posts
4 photos

In the mean time I have ordered some ER40 collets from ARC so when my chuck arrives I'm ready to go.

mechman4819/09/2015 10:02:57
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2938 forum posts
466 photos

I have 2 ball bearing closing nuts for my ER25 collet set, one for my MT2 holder in the mill & one that fits my other 2 holders, MT3/4, much easier to tighten / undo than the standard nut... a couple of my better buys.

Raymond Anderson19/09/2015 11:09:49
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785 forum posts
152 photos

Dave, I have an ER 40 one from Arc on the smaller of me 2 lathes and It is without doubt a super piece of kit. In a earlier post I gave details of the run out I got and am very,very, impressed. even with standard collets. Also Er 40 will grip up to 30mm dia bar.

Dave Harding 119/09/2015 16:49:12
148 forum posts
4 photos

I can't wait to get my hands on it as soon as it arrives I'll get it fitted. I have a few projects I'm keen get started on.

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