Myford ER25 Collet Chuck

[Tony K]

A well known tool retailer down Dunstable way has ER25 collet chucks on offer to fit directly onto the Myford. There is a made in Britain and a made in Taiwan option. The collets to fit appear to be made in Taiwan, although it is a little ambiguous.

The British chuck retails at £89.95, the Taiwan at £39.95 (incl. VAT). There is also a "deal" to buy collets and chuck together.

If buying this it would be a good idea to eyeball them both.

I would like to buy British and encourage more of this but £50 is a high price to pay extra if the quality is similar. I know you get what you pay for but....

Has anyone bought these or compared down in Dunstable?

[modeng2000]

You could try myworld.ebay.co.uk/ctctoolseller. I have used this shop and had no problems.

John

[steammadman]

I made mine from article in eng workshop


if you take youtime and measure twice cut once you should be ok i was

[steammadman]

if i can get the pic to stick i'l post one

[havoc]

I have been thinking about such a chuck, but I'm going to make me something from a collet holder for a mill. Just using the right size taper, make a drawbar and something to center it the far end of the headstock. My idea is that this way you can work even closer to the head and avoid another fit eliminating possible error.

Any toughts if this is possible or is it not cosher for some reason?

[Boadicea]

Do you mean like this mister Havoc? May have to copy it all into your browser.
cgi.ebay.co.uk/Boxford-Myford-collets-drawbar-and-adaptor_W0QQitemZ180210803611QQihZ008QQcategoryZ112399QQssPageNameZWDVWQQrdZ1QQcmdZViewItem

[havoc]

Yep, something like that but a simple square head instead of a handwheel. I would use a collet holder for the ER25 series as I already have those for the mill.

[wink]

I fancy an ER25 chuck myself, but I think it's better to get one with a backplate and machine it on the lathe to fit. Since I want a collet chuck for high accuracy, I'd rather do this than rely on the threaded version.

[Tim Bayliss]

A few years ago I had a ratty old ML4 lathe (with the standard Myford thread) somewhat on the 'wobbly' side. I went mad one day and purchased a good quality direct fit 3 jaw s.c. chuck AND one of the new direct fit ER25 collet chucks (of English make only at that time) in the hope they would improve things.
The collet chuck did what it said on the box but turned out to be no more 'accurate' in use than the chuck. It's great for threading, etc. as even small rounds are held firmly but it doesn't get used a lot because the chuck is quicker & easier to use for most things.
If you get it well aligned (as I now have) it is an asset but really of limited use I find.

[russell]

Havoc,
The problem with using one for a mill is that you cannot fit barstock through it. I made one similar to that in MEW a couple of years back for my Atlas and find no problem with the overhang.
Regards,
Russell.