Mardrive component Misplaced motor component

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Mardrive component Misplaced motor component

This topic has 19 replies, 8 voices, and was last updated 26 June 2025 at 09:53 by Colin D.

Viewing 20 posts - 1 through 20 (of 20 total)

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15 November 2015 at 17:09 #212459
martin baker
Participant
@martinbaker81996
Four years ago I dismantled my Pultra lathe whilst moving workshops. Only now have I been able to re-assemble the unit but I have come up against problems due to my stupidity ant not noting down where certain parts came from. I have attached an image of a part that I assumed came from inside the clutch cone of the motor but if it is put there the clutch cone cane be returned to its original position. I am hoping in anticipation that someone has had experience of Mardrive units and could advise. Many thanks.

Edited By martin baker on 15/11/2015 17:26:25
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15 November 2015 at 17:09 #17895
martin baker
Participant
@martinbaker81996
15 November 2015 at 17:16 #212462
Michael Gilligan
Participant
@michaelgilligan61133
Martin,

Sorry to say, your 'image' is missing, and your album only contains two Myford pictures.

MichaelG.
15 November 2015 at 17:28 #212466
martin baker
Participant
@martinbaker81996
Sorry having problems with adding the image but have done it now I think. Martin.
15 November 2015 at 17:41 #212467
Michael Gilligan
Participant
@michaelgilligan61133
Yes; Image is there now, Martin

Unfortunately, I don't immediately recognise it.

… I may be back [but don't hold your breath !]

MichaelG.

.

Edit: this page has a cross-sectional drawing, taken from the Patent, but shows nothing that I recognise as your component. [Both of mine are incomplete, and presently inaccessible]

Edited By Michael Gilligan on 15/11/2015 17:50:11
15 November 2015 at 17:48 #212468
Phil P
Participant
@philp
I does not look like part of a Mardrive to me, I have the type that is built into a lathe cabinet and there is nothing like that part in it.

Phil
15 November 2015 at 17:50 #212470
Neil Wyatt
Moderator
@neilwyatt
It looks like the sprung roller of a limit switch to me?

Neil
15 November 2015 at 22:04 #212527
Michael Gilligan
Participant
@michaelgilligan61133
I don't think it will help, but here & here & here are the early Patents

Note the somewhat surprising Applicant.

MichaelG.

Edited By Michael Gilligan on 15/11/2015 22:08:11

Edited By Michael Gilligan on 15/11/2015 22:10:09
15 November 2015 at 23:04 #212532
Arthur Sixsmith
Participant
@arthursixsmith43623
We used this type of clutch/motor on sewing machines. The spring and roller whent down the motor shaft to keep the flywheel and pulley apart. Hope this helps Arthur
15 November 2015 at 23:38 #212534
Michael Gilligan
Participant
@michaelgilligan61133
Arthur,

So … is it item 'd' on the sectional drawing?

I felt sure that mine just had a 'button' … but the roller would make sense.

Thanks for joining us.

MichaelG
16 November 2015 at 00:00 #212537
Phil P
Participant
@philp
I can tell you for sure item D is just a short pushrod with a spring connected to the back end of it.

In normal operation the clutch friction ring is held apart by this spring so it does not drive, when the pedal is pressed it pushes the cone pulley inwards and contacts the friction ring thus taking up drive until the pedal is released.

I reckon the part in the photo is from somewhere/something else.

Not sure why the patent applicants name is surprising, mine has the 'Marine Engineering Co' name on the main motor plate. That is where the name "Mar" drive comes from isn't it ?

Phil
16 November 2015 at 00:39 #212538
Michael Gilligan
Participant
@michaelgilligan61133
Posted by Phil P on 16/11/2015 00:00:54:

Not sure why the patent applicants name is surprising, mine has the 'Marine Engineering Co' name on the main motor plate. That is where the name "Mar" drive comes from isn't it ?

Phil

.

Yes, Phil … It is obvious when you already know [which I did], or if you happen to have an original motor with that nameplate [one of mine does, the other does not].

But anyone presuming that the famous Pultra MarDrive unit might be the intellectual property of Pultra would probably struggle to find the Patents.

I was just trying to help, by putting a little more information where people might easily find it.

MichaelG.
16 November 2015 at 07:28 #212551
Phil P
Participant
@philp
From the way you worded it, it sounded like "you" were surprised by the patent application name. You could have explained it to everyone if you had wanted to.

Perhaps I had better mind my own business in future posts of yours if I have spoken out of turn.

Phil
16 November 2015 at 07:48 #212557
Michael Gilligan
Participant
@michaelgilligan61133
Posted by Phil P on 16/11/2015 07:28:15:

From the way you worded it, it sounded like "you" were surprised by the patent application name. You could have explained it to everyone if you had wanted to.

Perhaps I had better mind my own business in future posts of yours if I have spoken out of turn.

Phil

.

Phil,

No, I don't think you have spoken out of turn … but, equally, I didn't think it was worth 'explaining it'

There has been enough nonsense on this forum in recent days; let's just all work together.

MichaelG.
16 November 2015 at 19:00 #212675
martin baker
Participant
@martinbaker81996
Thanks to you all.
16 November 2015 at 23:18 #212702
Ajohnw
Participant
@ajohnw51620
Not sure but this page shows some copies of drawing from the patent but near the top is a "photo" of a cord passing over a pulley to operate the clutch. It's not clear but it looks like something like your part might be connected to the cord.

**LINK**

John

–
17 November 2015 at 10:10 #212742
Michael Gilligan
Participant
@michaelgilligan61133
Posted by John W1 on 16/11/2015 23:18:32:

… a "photo" of a cord passing over a pulley to operate the clutch. It's not clear but it looks like something like your part might be connected to the cord.

.

John,

For info. … That 'cord' was a chain [lightweight flat links]

There is a very useful little video, here, showing a bench-mount MarDrive unit in very original-looking condition.

MichaelG.
25 June 2025 at 22:05 #804548
clockwork1957
Participant
@clockwork1957
Hi Martin,

Do you still have the Pultra and Mardrive cabinet.

I’ve just purchased one and am reaching out for any links to a parts list for the 1590 and the Mardrive motor drive.

Thanking you in anticipation.
26 June 2025 at 06:18 #804566
Colin D
Participant
@colind
I’ve numerous manuals and parts catalogues etc for the 1590 and the 1750/1770, and the Mardrive.

I do have 3 of the 1590s but not in use at the moment due to lack of workshop space, I’m more than full up.
I do have a 1750 and a 1770 in useable order, both with Mardrives, and have stripped a couple of cabinet mounted ones, so may be able to help.
Colin
26 June 2025 at 09:53 #804587
Colin D
Participant
@colind
I wish I’d taken some pics of those cabinets before I stripped them, but idiot that I am, I don’t remember doing so, I will have a look though, just in case I did. It’s a few years back, my memory is great for some things, but not everything !

Will try and attach pics of the drawings etc I have to my profile, think that’s how it’s done, I managed it with the old forum software, but haven’t yet tried it with the new version, but I doubt that it’s beyond the wit of man.

I can certainly take a pic of what’s left of the frame, but may be slightly different as these were 1770’s not 1590.

Colin
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