[modeleng] Re: milling chuck
- From: JEM HARRISON <jemharrison@xxxxxxxxxxxxxx>
- To: modeleng@xxxxxxxxxxxxx
- Date: Mon, 29 Dec 2008 11:17:20 +0000 (GMT)
Ron,
Â
I have no complaints about the quality of the Vertex chuck. My problems are
due to my inexperience/lack of knowledge about how to do things. My main
reservation about the Vertex chuck is that I reckon that it is too big for the
D-W. Another problem is the difficulty in fitting the cutters in the chuck,
(a) so that they are screwed in sufficiently to engage with the nipple, and (b)
without cutting my fingers to shreds! (I use gloves).
Â
Myford MT2 collets I have not tried in the D-W. I have a couple that I have
used on my ML10, but when I wanted a half-inch one, Myfords had exhausted their
stock and were looking around for a manufacturer. The trouble they were
having was that manufacturing prices in Blighty were so high that the retail
price would be more than people would be willing to pay.
Â
I eventually purchased a set of ER25 collets for the ML10, but getting these to
run true is a bit of a lottery. Apart from my inexperience, variables are due
to:
1. How accurate is the engagement between the ER25 chuck and the Myford
spindle.
2. The engagement between the ER25 collet and its chuck nose.
3. Ditto between collet and chuck taper.
4. Diametric difference between workpiece and collet bore.
5. Opportunities for fluff, grit etc to get into any part of the inter-faces.
Â
Time to put the kettle on.
Â
Best wishes,
Â
Jem Harrison
Basildon UK
--- On Sun, 28/12/08, Ron Head <ron.head@xxxxxxxxxxxxx> wrote:
From: Ron Head <ron.head@xxxxxxxxxxxxx>
Subject: [modeleng] Re: milling chuck
To: modeleng@xxxxxxxxxxxxx
Date: Sunday, 28 December, 2008, 6:38 PM
Hi Jem
Several years ago, I too fitted a Vertex chuck to my Dore-Westbury (I think the
chuck was called a Posilock - in reality a poor man's Autolock). In
practice, I found the thing too unwieldy. Apart from being a real pain to use,
it wasn't very accurate, and it put the cutter 3-4 inches further away from
the spindle bearings, magnifying any runout and making the whole thing very
'whippy' due to the small spindle.
I went back to using Myford 2MT collets directly in the spindle socket, and
sold the Vertex chuck. I know this limits me to cutters of 1/2" shank
diameter, but for the sort of work I do, it isn't a problem.
Regards
Ron
----- Original Message -----
From: JEM HARRISON
To: modeleng@xxxxxxxxxxxxx
Sent: Friday, December 26, 2008 11:54 AM
Subject: [modeleng] Re: O/T Christmas greetings
Merry Christmas and a Happy New Year to all modeleng@freelists.
Â
Dennis,
Â
Good to know that someone else has a battered D-W !
Â
I bought a Vertex (which I gather is a Clark type), probably from Chronos.Â
It comes in a nice box, with three collets and a wopping great spanner.....but
no instructions. At least a flat-pack from IKEA comes complete with
pictograms...a vast improvement on the martian tomes that accompany electronic
gadgetry. Would-be model engineers are assumed to know how to fit/strip/use
tools and attachments safely and successfully. Oh, yes?!
Â
The Vertex chuck is, I think, well made, and I would recommend it. My only
reservation would be that I wonder if other designs of milling chuck might be
more suitable for the D-W.
My current project, heading for the scrap-bin, is a pair of cylinders for the
Paul Forsyth 'Jersey Lilly' design in Gauge 1. I purchase two slot
drills (one-sixteenth and one-eighth)from Chronos to mill the steam ports, but I
found that they are not long enough to engage with the nipple in the chuck, and
if they were, I would never get the darned things out! Chronos have kindly
agreed to exchange the slot-drills for the long series, but I am still waiting
for them to arrive.
Â
I suspect that there are other milling chucks more suitable for small
machines, but I have no experience of them. I did wonder about trying the ER25
collet chuck, but a problem I find with this on my lathe is that if I remove a
work piece from it and re-insert it, it does not run true, so I have to undo the
chuck and rotate the workpiece several times before it is as near as dammit.
Â
Nothing is straight-forward in this game!
Â
Best wishes,
Â
Jem Harrison
Basildon UK
--- On Fri, 26/12/08, Dennis Rayner <dennis.rayner@xxxxxxxxxxxx> wrote:
From: Dennis Rayner <dennis.rayner@xxxxxxxxxxxx>
Subject: [modeleng] Re: O/T Christmas greetings
To: modeleng@xxxxxxxxxxxxx
Date: Friday, 26 December, 2008, 10:46 AM
Santa was good to me - he brought me a book on milling (never had any
training in my life) AND spending money!
I've come to the conclusion that I should replace my old Clare chuck with
a
new one for my rather battered Dore-Westbury.
I wondered if any of the (UK?) group members had any recomendations as to
make /model/suppliers?
The D/W has a #2 MT fixing.
Thanks in advance for any advice.
Dennis
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