Indexable ML7 tailstock

[AJWParticipant @ajw]

[AJWParticipant @ajw]

Visited Ally Pally on Sunday, thoroughly enjoyed it and one of my purchases was a secondhand Myford indexed leadscrew wheel/handle.
The indexed ring from this has now been fitted to my tailstock handwheel. Back of handwheel shallow bored to locate the ring which was stuck on with araldite along with a push fitted zero point on the tailstock casting.
Only been fitted a couple of days but already finding it so useful!
Before this I would generally hold a Vernier against moving parts to gauge depth.
Can’t post pictures but some photos are in my Lathe mods album if anyone is interested.

Alan

[Philip RoweParticipant @philiprowe13116]

Nice job there Alan, bit of luck you finding that handwheel I can't say that I have ever seen one before. Were they a standard Myford part or is it a homebrew?

Phil

[egaParticipant @ega]

It isn't a leadscrew handwheel by any chance?

Easy to post from your album using the image button.

[Malcolm Jones 1Participant @malcolmjones1]

it isn't an Lavis vernier dial for the saddle hand wheel by any chance.

I have one I removed from my old non power cross feed super 7.

it will not fit the power cross feed super 7 that I have now.

Just found the fitting instructions it was made by

J T Lavis

15 Goddington Road

Bourne End

Bucks

 

Malcolm

Edited By Malcolm Jones 1 on 25/01/2019 13:25:53

[egaParticipant @ega]

The Lavis dial was divided into 86 and 1/4 divisions so I don't think it's this dial.

[AJWParticipant @ajw]

Phil, my original tailstock handwheel has been modified by adding the engraved ‘ring’ part from an original Myford leadscrew handwheel.
I also, a while ago, modified my original non engraved leadscrew handwheel by fitting the ring from yet another leadscrew handwheel! This one was not a Myford part (so didn’t feel so guilty carving it up!) and isn’t engraved it looks laser marked.
When machining the parts for this one I made the indexed ring able to rotate independent of the handwheel so it can be zeroed or moved as required.
Once again a very useful mod.
I have just put a photo of the leadscrew handwheel in my lathe mods album.

Alan.

It’s not possible to put photos up from my phone, and boy I have tried!

Edited By AJW on 25/01/2019 17:19:41

Edited By AJW on 25/01/2019 17:20:12

Edited By AJW on 25/01/2019 17:20:53

[egaParticipant @ega]

Posted by AJW on 25/01/2019 17:18:14:
It's not possible to put photos up from my phone, and boy I have tried!

Sorry if my comment touched a sore spot!

My impression is that many members access and post from mobiles so this seems a rather basic problem which deserves some attention.

[Howard LewisParticipant @howardlewis46836]

86.25 divisions sounds odd! Almost as if intended for one of the 12 tpi leadscrews on the ML 1, 2,3 or 4.

My old ML 7 came with a Picador Handwheel on the Leadscrew, so I took it into work one Saturday morning and used the optical dividing head inn the Standards Room to graduate it with 125 divisions. Was quite a useful modification.

Graduated Handwheels always come in handy, at some time or another

Howard

[egaParticipant @ega]

Posted by Howard Lewis on 25/01/2019 17:47:40:

86.25 divisions sounds odd!

Agreed. Here is the Lavis advert:

No doubt someone can "do the maths"!

Edit: Malcolm Jones, might you post the instructions?

Edited By ega on 25/01/2019 18:21:15

[Howard LewisParticipant @howardlewis46836]

The secret is using the vernier scale to produce a result in sensible units!

[AJWParticipant @ajw]

Well I’ve never seen one of those before!
What a good idea – not sure about the Vernier bit!
Might have to get hold of yet another handwheel!

Alan

[GeorgineerParticipant @georgineer]

Posted by Howard Lewis on 25/01/2019 17:47:40:

86.25 divisions sounds odd! Almost as if intended for one of the 12 tpi leadscrews on the ML 1, 2,3 or 4.

It does sound odd, especially since 12 tpi gives 83 and 1/3 thou per rev.

George

[SillyOldDufferModerator @sillyoldduffer]

Posted by Georgineer on 25/01/2019 19:19:48:

Posted by Howard Lewis on 25/01/2019 17:47:40:

86.25 divisions sounds odd! Almost as if intended for one of the 12 tpi leadscrews on the ML 1, 2,3 or 4.

It does sound odd, especially since 12 tpi gives 83 and 1/3 thou per rev.

George

Dividing the dial into 86.25 divisions made more sense after I spotted that 8⅝" is 8.625

Dave

[Author]

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