Myford super 7 tailstock thread

[ianjParticipant @ians]

Myford super 7 tailstock lever feed attachement

[ianjParticipant @ians]

Hi.

I've just bought a tailstock lever feed attachement for my ML7R from the ads here, ( thanks Nick)

It did not include the barrel or the threaded cap which screws into the right hand side of the tailstock. I plan to make these parts (after all I have a lathe )

Question is:-

(1) does any one know what the internal thread in the right hand side of the tailstock is?

 

(2) Can any one with this attachement measure these two parts?

 

I've incuded a photo (taken from lathes.co.uk) which clearly shows the two parts I hope to make.

ie. the barrel and threaded cap.

 

Thanks in advance.

 

Ian

 

Edited By ian j on 16/01/2016 18:31:30

Edited By ian j on 16/01/2016 18:37:12

[John Stevenson 1Participant @johnstevenson1]

Think I might have a spare barrel and nut kicking about, check tomorrow as it's twenty past dark now and the workshop is haunted.

[davebParticipant @daveb17630]

Anyone else think their old mill is haunted?

[“Bill Hancox”Participant @billhancox]

Mine is haunted with the ghosts of projects past.

[ianjParticipant @ians]

John.

That would be great if you have.

Ian

[Kenneth DeightonParticipant @kennethdeighton43272]

Place and press a piece of blue tack inside the barrel onto the treads, carefully remove and measure the threads, I have done this several times.

Ken.

[egaParticipant @ega]

ian j:

Congratulations on getting this excellent accessory; I can certainly measure mine if needed and look forward to you sharing your impressions of it in due course.

I have made one or two small improvements to the design and will look out a photo.

[Kenneth DeightonParticipant @kennethdeighton43272]

I mean THREADS. Ken.

[ianjParticipant @ians]

ega.

If you could go to the trouble of making a simple sketch with some dimensions on, this would be greatly appreciated.

Another question, In the photo I posted what purpose do the cap head screws on the RHS of the casting serve.

Ian

[egaParticipant @ega]

 

 

Photos:

As you can see, I have replaced the pivots which were worn; two are custom-made phos bronze bolts and the third is a modified shoulder screw. The clamp has been provided with a ball handle and the cap screws retaining the collar have been replaced with CSK screws to give a little more travel. Also visible is the knurled end of the draw bar which the lever feed makes possible.

I have fitted a slightly longer lever with a more comfortable handle. Because the device makes the tailstock "tail heavy" the new lever is taper drilled at the handle end to improve balance. Finally, the other end has been fitted with a brass nose so that the lever can be used as a drift to knock out tooling (see first photo).

Edited By ega on 17/01/2016 10:28:57

[egaParticipant @ega]

ian j:

Does my last post, which crossed with yours, answer your question?

I'll be delighted to do a sketch and suggest you PM me with your email address for this purpose, always assuming the offer from John Stevenson does not make this unnecessary.

[ianjParticipant @ians]

ega.

Thanks for the photo's. It's becoming a lot clearer now on whats's missing.

 

I've sent  you a PM

Regards Ian

Edited By ian j on 17/01/2016 11:23:53

[John Stevenson 1Participant @johnstevenson1]

Is this what you want Ian ?

[ianjParticipant @ians]

John.

That's brilliant , the very thing.

I've sent you PM

Ian

[ianjParticipant @ians]

Thought I would post a couple of photo's showing the lever feed tailstock attachement now fitted to my ML7R.

Thanks to Nick for selling it, John for providing the missing parts ( I had to mill the key way approx. 1" longer to get the full travel) & ega for the photo's and the offer of assistance.( I wil make a draw bar as you have)

Ian

Edited By ian j on 20/01/2016 13:16:18

Edited By ian j on 20/01/2016 13:20:28

[Nick DringParticipant @nickdring83416]

Ian,

It's really good to see that the attachment went to a good home! My Dad would be most impressed with the installation on your machine.

Hope it serves you well in the years to come.

Nick.

[egaParticipant @ega]

ian j:

Thanks for the photos. That's a good-looking ball handle! As you know, I prefer a more hand-friendly handle on the lever itself.

[Mark KilgoreParticipant @markkilgore24274]

I've been using one of these attachments for a few years. Had planned to install some sort of DRO, as many of you have, but found that I could set the travel stop within half a hundredth (inch) using a steel rule. That means I can watch the drilling process, not the readout, and let the stop worry about the end of the process. What a pleasure!

[David HaythornthwaiteParticipant @davidhaythornthwaite90386]

Hi Ian J

Back in 2016 You corresponded with John Stephenson regarding a long tailstock barrel for your Myford Super 7 and it appears that you bought the long barrel, complete with nut.

I am thinking of converting my Super 7 tailstock to lever feed, making the entire mechanism from scratch. I shall probably start by making a long barrel for my lathe, but I am concerned about drilling / boring such a long hole down it. If convenient, could you please measure your barrel and tell me how long it is so that I can plan how to make this part. I see that the cap has a brass/bronze plate on it and presumably this forms a bush for the tailstock barrel to slide through.I have the normal barrel on my machine and should have no problem in creating a new cap with a bronze bush in it.

I hope that you will be able to advise me.

David H

[noel shelleyParticipant @noelshelley55608]

I to have this attachment with the barrel and cap/nut missing, so add my name to those who need help please. Hopper may have drawings or I can help with dimensions all the other parts.  Noel.

Edited By noel shelley on 10/01/2023 13:15:27

[William SParticipant @williams]

When I get home later I will do a sketch of the required parts and get some dimensions.

The bronze bush is top hat shaped, free floating until the bolts are tightened to allow it to align to the tailstock bore/barrel instead of relying on the thread if that makes sense.

When I was contemplating making the barrel I thought to use a bit of thick wall tube, thus negating to drill a long hole, it is only a clearance hole.
Another worry I had was the morse taper, getting it square/ true etc. I was going to put that in first in the tube, put a dead centre in it and machine the o.d down to the finished diameter. Basically between centres.
I was lucky enough to find the missing parts so I gave up making them!

I’ll be back!

William

[ianjParticipant @ians]

 

 

 

 

David/Noel

Here is a drawing showing the basic dimensions. Any more questions just ask.

 

If you right click on the image and select open in a new tab they are a lot clearer.

 

Ian

 

 

Edited By ian j on 10/01/2023 16:40:51

Edited By ian j on 10/01/2023 16:45:02

[David HaythornthwaiteParticipant @davidhaythornthwaite90386]

Thank you Ian for your photographs.

I do not have a proper CAD system but will probably try to do some proper drawings now I have your measurements.

I have been otherwise engaged tonight, but for the moment I have measured the thread on the nut and like you I make the thread to be 1.375" and it is 20tpi. I have only measured quickly with a vernier and my tailstock barrel seems to be 1.111" Diameter. I shall measure more accurately tomorrow with a micrometer as that seems to be a very strange figure either in imperial or metric!

Thanks for your help. Please bear with me as I am a bit slow at present due to a health problem.

William – I shall be interested in any measurements. If the barrel turns out to be 1.25" dia. it would be useful as I could use a length of Silver Steel (Drill Rod to our friends over the Atlantic)

I am hoping to make it so that when retracted it can either stop at the end of natural travel or further out to pop out a taper tool.

Kind regards

David

[ianjParticipant @ians]

David.

When I measured the barrel with a digital caliper I measured 1,115" like you I thought it was a odd ball size but pot it down to me so rounded it up to 1.125", Just measured it again with digital micrometer and get 1.114". I suppose it's just has to be a nice clearance fit in the tailstock casting.

Ian

[Author]

Posts