Conversion bracket

This topic has 28 replies, 9 voices, and was last updated 10 August 2020 at 11:53 by Hillclimber.

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10 January 2019 at 13:17 #26390
John Appleby 1
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@johnappleby1
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10 January 2019 at 13:17 #390332
John Appleby 1
Participant
@johnappleby1
Hi all, wonderd if any body has any idea how to connect (via bracket) Myford VM-A milling/drilling attachment to Myford Super 7 lathe. The mill came with a cast iron support but doesn’t match any of the pre drilled holes on the lathe. Is there a convertion plate or bracket that is available would be grateful for any advice. Lathe is on a Myford cabinet raised on bed raisers.

First time I’ve used the site I’m a new member so be gentle with me.

John
10 January 2019 at 14:54 #390353
Neil Wyatt
Moderator
@neilwyatt
Hello John,

Welcome to the forum. Looks like you need to raise the lathe on blocks, you won't need Myford raising blocks, you can improvise your own.

Neil
10 January 2019 at 16:18 #390364
ega
Participant
@ega
Plus one for shop-made raising blocks. Tubal Cain gives a design for "jacking screws" in WPS 15.
10 January 2019 at 16:50 #390367
KWIL
Participant
@kwil
See **LINK**for an excellent set of photos.

OP appears to already have the lathe on raising blocks since he says "Lathe is on a Myford cabinet raised on bed raisers.". These are necessary to ensure bottom of mill column clears the tray.

The existing holes on the rear of the bed are for the taper turning attachment, having determined where along the bed the column needs to be so as to end up wih the mill column midway between chuck and tailstock, make a drilling jig plate whch incorporates the horizontal pitch of the existing holes and align the four holes of the mill bracket as required using thread taping size drill.

Bolt dril plate to bed and pilot the four holes, tap as required.

Just a suggestion.
10 January 2019 at 16:57 #390369
KWIL
Participant
@kwil
Sorry,

I should have added that the remaining 2 holes are for fixed studs to assist fitting the bracket.

Bracket fitted, thumb screws (on bracket) are tightened which hold bracket in place whilst placing the 4 holding screws on the rear face of the bed. Necessary if you are working from the lathe front at a later date to fit/replace the bracket. In the first instance you will already be working from the rear in order to drill and tap the holes.
10 January 2019 at 16:58 #390370
JasonB
Moderator
@jasonb
Is the back of the bed flat enough to just bolt to? Neither Neil's or Kwil's similar links show the back.
10 January 2019 at 17:26 #390377
John Appleby 1
Participant
@johnappleby1
Thanks all, as I said new to using the forum and the response has been gratifying..KWIL I like your idea had similar thoughts so will follow up with a back plate and let you know how it goes .

JasonB just put a straight edge on back of lathe seems to be quite flat.

When I work out how to insert pics I’ll send some on my progress.

Thanks. John.
10 January 2019 at 17:41 #390381
ega
Participant
@ega
JasonB:

It's a machined facing and, AFAIK, a standard feature.
10 January 2019 at 17:56 #390386
JasonB
Moderator
@jasonb
I did not think the flat for the TTA was very deep on a S7 so you may get unwanted nodding, OK on a 254 where it is much deeper and has 4 holes
10 January 2019 at 18:07 #390387
ega
Participant
@ega
Posted by JasonB on 10/01/2019 17:56:05:

I did not think the flat for the TTA was very deep on a S7 so you may get unwanted nodding, OK on a 254 where it is much deeper and has 4 holes

Good point. I confess I did not know that the VMA could be fitted to the Seven.

The flat is also used for the multistop (in conjunction with the capstan) which like the TTA involves light loads in line with the bed.

Edited By ega on 10/01/2019 18:28:20
10 January 2019 at 18:50 #390395
JasonB
Moderator
@jasonb
If you look closely at the Lathes.co.uk photo where the girl is boring a casting you can see one or maybe two large rectangular items under the bed, maybe a plate and angle bracket that fitted to the stand as well as the rear of the bed which would have firmed things up a lot, you would need it raised up to get these in

Edited By JasonB on 10/01/2019 18:52:53
10 January 2019 at 19:04 #390400
alan-lloyd
Participant
@alan-lloyd
Hi I think what you have is a mounting bracket for the 254 lathe
10 January 2019 at 19:32 #390405
Michael Gilligan
Participant
@michaelgilligan61133
It's worth looking across at the Rishton page: **LINK**

http://www.lathes.co.uk/rishton/

where some alternative mounts are shown.

Personally, I think it would be cruel to simply hang all that weight off the back of a Super 7

What about mounting both machines on a common block [of granite or such] ?

MichaelG.
10 January 2019 at 20:49 #390422
John Appleby 1
Participant
@johnappleby1
Great for all the input. I was thinking of only using the existing tapped holes in the back of the 7 just to locate the mill not take the weight. The weight would be taken by the lathe cabinet and reiforced underneath with the rear of the mill supported on raised blocks. Yes the mill came of a 254 lathe.
11 January 2019 at 19:02 #390586
alan-lloyd
Participant
@alan-lloyd
Do you want to sell it?
11 January 2019 at 19:11 #390588
John Appleby 1
Participant
@johnappleby1
Hi Alan as you probably sussed I’ve only just got the said mill and well on the way to fitting to my super 7 so the answer to your enquiry no but some time in the future who knows. I’ll keep you posted.

John
14 January 2019 at 09:48 #390973
ega
Participant
@ega
Posted by ega on 10/01/2019 17:41:17:

JasonB:

It's a machined facing and, AFAIK, a standard feature.

PS to my post:

The photograph on p33 of Ian Bradley's Manual shows a much deeper facing than that on my 1960s machine although there appears to be still just one row of tapped holes. If this was a production change then perhaps the reason was indeed to accommodate a milling attachment.

The same photo shows the tailstock barrel clamp in the early position which may give a clue as to the date of the machine concerned (I can't make out the serial number in the photo).
3 February 2019 at 13:09 #394495
Chris Thorn
Participant
@christhorn
John,

How did you get on mounting the mill?

Looks like I am going to buy a super 7 and a Vma mill and will need to attach them as you needed to.

Any pics or help gratefully received !

Regards

Chris
3 February 2019 at 14:35 #394507
John Appleby 1
Participant
@johnappleby1
Hi Chis, just about finished fitting mill will post pics as soon as I’ve uploaded them to my album..

John.
3 February 2019 at 22:33 #394568
John Appleby 1
Participant
@johnappleby1
Chris just added 3 pics one showing 1/4 tapped bsf holes in rear of lathe bed which were existing. The second showing 1/2” thick plate drilled and counter sunk to take 1/4 screws and 4 tapped holes to match colum bracket. Third pic. shows colum bracket in place supported on 3” dia. Jack I made to adjust final position.

I will add further pics later to show how I finished the final fixings.

John
4 February 2019 at 15:52 #394678
Chris Thorn
Participant
@christhorn
Thanks John

Have you strengthened the base ?

Was that your own design jack?
4 February 2019 at 18:00 #394697
John Appleby 1
Participant
@johnappleby1
The jack I made out of 3” ally bar stock I had laying around. Turned it down and thread it 1 1/8” bsw same as lathe nose. Drilled 1”thick sq. block threaded to suit. Drilled thro Jack 1/2” dia to allow for holding down bolt.

Drilled 1/2” dia hole thro mill foot so as to locate jack, tho base of cabinet, thro 1/2” thick reinforcingp plate on underside of cabinet the plate is about 4” wide and 10” long. One extra bolt at the opp end to the jack bolt.

Dose any of this make sense. I’ll post more pics..
4 February 2019 at 18:54 #394710
Chris Thorn
Participant
@christhorn
Yup makes perfect sense 👍 thanks

I like the look of your tool post drill, did you make it

Can you show a better pic of it?
5 February 2019 at 12:36 #394781
John Appleby 1
Participant
@johnappleby1
Chris its a quick-mill see picture.
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