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Myford Lathe Chucks

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Steamgeek08/01/2014 15:52:45
44 forum posts
4 photos

Does anyone know who is making the chucks Myford are selling at the moment?

My self centring three jaw is past it's best and I need to consider investing in a new chuck. I have been looking around at what is available, my prefrence is to avoid the usual raft of will fit parts, but bottomless pockets are not an option.

Martin Kyte08/01/2014 16:22:32
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1569 forum posts
24 photos

I cannot tell you exactly who makes them but I bought a 3 jaw self centering chuck 40/196 125mm and was very pleased with it. Why don't you email Myfords and ask?

regards Martin

Lambton08/01/2014 16:27:45
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692 forum posts
2 photos

You could try asking Myford but I believe they are Bison products from Poland which are very good.

TOS chucks from Czechoslovakia are very good - I have 3 in various sizes and I am very pleased with them.

I also understand the Zyther chucks (made in India) from Arc or Chonos are of good quality but I have no personal experience of them.

I would not bother with second-hand chucks or those from strange sources. A good chuck is the heart of a lathe and it is worth buying the best you can afford.

MichaelR08/01/2014 16:37:22
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349 forum posts
62 photos

I bought a new chuck from Myfords before they went out of business for my 254s, the chuck was a Bison expensive but good quality.

Stub Mandrel08/01/2014 18:52:17
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4307 forum posts
291 photos
1 articles

I'm very pleased with my 4" Zither chuck from Arc. A better bit of kit than I ever expected to have on my lathe.

Neil

David Colwill08/01/2014 22:08:17
598 forum posts
32 photos

Put me down as another satisfied zither user (80mm four jaw sc).

David.

C J22/01/2020 12:16:36
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80 forum posts
72 photos

I have a Myford Super 7 lathe and want to make a bush with a flange at one end from some 40mm round bar, and so hold this in a chuck and cut a 28mm hole through the centre with a boring bar.

The problem is, I want to pass the boring bar completely through the piece of bar but the centre hole of my 4" chuck is just 25mm

So does anyone know of a 4" or 5" chuck for the Super 7 which has a larger centre hole, as I have searched for another chuck but for some reason the manufacturers seem shy of providing the diameter of the centre hole?

I realise I could also hold the bar with a clamp on a faceplate (can't think of its name)  but I want to do a number of procedures on this bush.

Edited By C J on 22/01/2020 12:28:37

Nigel Bennett22/01/2020 12:35:02
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312 forum posts
11 photos

CJ - See Arc Euro catalogue. You're looking at a 5" 3-jaw (30mm bore) - but that's a bit big for a Myford as they're very heavy - and the Chinese ones are £65. Not fond of the Chinese chucks, as their jaws are very heavily chamfered so that you can't grip thin things with them. Buying TOS or Bison would be more expensive. The 5" Burnerd one on my Boxford 280 is 35mm bore, by the way.

Hope that helps!

Edited By Nigel Bennett on 22/01/2020 12:35:34

Edited By Nigel Bennett on 22/01/2020 12:35:58

ega22/01/2020 12:43:23
1435 forum posts
115 photos

CJ:

I assume you haven''t got a 4J (essential in my opinion) but think that you could probably do this with the 3J with a little ingenuity.

If you can post a dimensioned sketch I am sure you will get some ideas from members.

C J22/01/2020 12:44:27
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80 forum posts
72 photos

Thanks, I realise I am coming up against the capacity limitations of the Super 7, I don’t like some of the Chines stuff either and will avoid it if possible but I will look at Arc Euro’s catalogue

RAPHAEL VAL GOLEZ 122/01/2020 12:57:20
59 forum posts
2 photos

Hi CJ, You can still do it. If it was me I will get my 40mm round bar's dimension (length) and add an extra distance to the whole length to provide a grip for the chuck. Drill and then bore to the right length, with the extra distance you don't need to go all through your work piece. Just enough bore to get you a bit passed your decide length and then part off near the chuck. Ofcoures you will have a bit of a waste but I think its better than buying a new chuck with a desired diameter to allow a bore through it if there is one for the myford. Other option if the length of your work is all set is to have a Keats plate and angle to adjust the distance from the chuck plate if this allows and finally in-between center boring if your are fully equipped. Others who are more experience here than me might have better approach.

Hope this helps.

Raphael

JasonB22/01/2020 13:03:59
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Moderator
17028 forum posts
1825 photos
1 articles

Just pack the work off the chuck face as you tighten and then remove the packing. Or if you have soft jaws use those, both methods will leave the work clear of the chuck face.

20200122_131239[1].jpg

Edited By JasonB on 22/01/2020 13:17:59

Michael Gilligan22/01/2020 13:05:14
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14758 forum posts
635 photos
Posted by C J on 22/01/2020 12:16:36:

I have a Myford Super 7 lathe and want to make a bush with a flange at one end from some 40mm round bar, and so hold this in a chuck and cut a 28mm hole through the centre with a boring bar.

The problem is, I want to pass the boring bar completely through the piece of bar but the centre hole of my 4" chuck is just 25mm

[…]

.

If you have, or can acquire, a set of external jaws for your existing chuck ... you might get away with using the largest step for the boring operation [treat this as a ‘second op’ after you have made the basic shape]

MichaelG.

.

Jason beat me to it [same principle, different detail]

Edited By Michael Gilligan on 22/01/2020 13:07:31

JasonB22/01/2020 13:09:53
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Moderator
17028 forum posts
1825 photos
1 articles

I did not suggest external jaws as the difference in the steps diameters is likely to be more then the 6mm wall thickness of the part so you would need to pack it away from the jaw anyway.

C J22/01/2020 13:18:38
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80 forum posts
72 photos

I have got a 4j but want to avoid the problem of rechecking this part which I’m sure it will need

I suppose I could do the boring with the 4j and the turning with the 3j but it won’t be as quick as using a 3j with more capacity only

Martin Kyte22/01/2020 14:09:51
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1569 forum posts
24 photos
Posted by C J on 22/01/2020 13:18:38:

I have got a 4j but want to avoid the problem of rechecking this part which I’m sure it will need

I suppose I could do the boring with the 4j and the turning with the 3j but it won’t be as quick as using a 3j with more capacity only

Whatever you do, it would be quicker than waiting to get a bigger chuck.

Martin

C J22/01/2020 14:14:37
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80 forum posts
72 photos

Ha, ha!

Harry Wilkes22/01/2020 14:28:34
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792 forum posts
60 photos

I like others have often used the method suggested by Jason but I have also made a spider for my chuck which I find very useful

H

ega22/01/2020 14:35:26
1435 forum posts
115 photos

When there is limited space for the boring bar to run out into a saddle stop is a worthwhile safety feature.

Michael Gilligan22/01/2020 15:49:33
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14758 forum posts
635 photos
Posted by JasonB on 22/01/2020 13:09:53:

I did not suggest external jaws as the difference in the steps diameters is likely to be more then the 6mm wall thickness of the part so you would need to pack it away from the jaw anyway.

.

Fair comment, Jason

... although packing it is a very simple matter with the external jaws

MichaelG.

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