By continuing to use this site, you agree to our use of cookies. Find out more
Forum sponsored by:
Forum sponsored by Allendale Jan 24th

Myford Super 7 Toolpost issue

All Topics | Latest Posts

Search for:  in Thread Title in  
Matt Stevens 105/05/2021 03:57:09
90 forum posts
8 photos

Hi All,

So i just picked up a Myford Super 7B for a great price and with many accessories as well. It does have a quick change tool post holder, but its a real mini thing and will not accept 12mm tools which is most things i have!

I want to move the quick change tool post holder from my southbend lathe across which is much more substantial and of course will accept the 12mm / 1/2" tools.... trouble is, the height of the top slide of the Myford is such that with the holders bottomed out, i would not get to center height on the lathe!

How have most overcome this? I was hoping not to have to buy a new quick change system....

I can use the original tool post holder i guess, but thats like a down grade.

Open to suggestions....

JasonB05/05/2021 06:57:07
avatar
Moderator
20463 forum posts
2268 photos
1 articles

I think you will find most people use smaller tooling on the Myfords

Ady105/05/2021 07:38:37
avatar
4353 forum posts
675 photos

Myford sized lathes don't really do 1/2 inch tooling

They do make good parallels

John Baron05/05/2021 07:54:19
avatar
448 forum posts
180 photos

Hi Guys,

I can use 1/2" inch tools in mine but much prefer 6 or 10 mm HSS ! Far less work profiling and sharpening !

Andrew Moyes 105/05/2021 07:54:52
134 forum posts
22 photos

Look up the thread 'QCTP mounting on the Myford S7' and you will see some solutions.

Hopper05/05/2021 09:07:11
avatar
5434 forum posts
134 photos
Posted by Matt Stevens 1 on 05/05/2021 03:57:09:

I can use the original tool post holder i guess, but thats like a down grade.

Open to suggestions....

The original Myford 4-way toolpost takes 3/8" tooling, about 9.5mm. So 12mm tooling will sit too high in it.

Ady105/05/2021 09:17:24
avatar
4353 forum posts
675 photos

Just picked up a Drummond M at the weekend and beside it was a Myford 7 which was waiting for another person to collect

It looked like what it was made for, a nice model makers lathe

Circlip05/05/2021 09:36:24
1261 forum posts

I feel the O/Ps pain, I have some perfectly good 1" (25mm) square shank lathe tools that won't fit in my Maximat.

Regards Ian.

Matt Harrington05/05/2021 09:40:30
avatar
179 forum posts
7 photos

Matt, What QC system is on the Myford at the moment? You can get a suitable low cost QC system that takes 12mm at a good price on Banggood (and UK stock and thus quick delivery). You could then sell on your exsisting one....Just a thought.

Matt

JasonB05/05/2021 10:10:27
avatar
Moderator
20463 forum posts
2268 photos
1 articles

Matt although there are plenty of cheap QCTP about the problem with one that would take 12mm tooling AND fit a Myford is the bottom of the toolholder would only be about 3mm thick!

Not ideal for rigidity and likely to open up but sounds about right for Banggood wink 2

Kiwi Bloke05/05/2021 11:49:57
531 forum posts
1 photos

Q: 'How have most overcome this?'

A: Well, by getting the right sized tooling... If you insist on using over-sized toolholders in a system they don't fit, make them fit! Mill 2mm off the bottoms off the toolholders. This is probably the most commonly-used solution, and, as you know, far cheaper than buying replacement tooling.

Matt Harrington05/05/2021 12:04:47
avatar
179 forum posts
7 photos

Jason, the 250-001 holders are the same ones as sold by other vendors and to be honest, I have never had any issue with rigidity. In fact I also use a modified version of these holders on some of my Tripan toolposts, again with no issue. Matt

not done it yet05/05/2021 13:08:36
5866 forum posts
20 photos
Posted by Circlip on 05/05/2021 09:36:24:

I feel the O/Ps pain, I have some perfectly good 1" (25mm) square shank lathe tools that won't fit in my Maximat.

Regards Ian.

Reduce the dims of those cutters? I much prefer to reduce the cutter/cutter holder than increase the tool holder capacity.

Steviegtr05/05/2021 17:21:45
avatar
2026 forum posts
283 photos

Have a look at a video i did a while ago on youtube. I explain & show how i made a 250-111 holder fit. Hope it helps you.

Steve.

Myford QCTP fitting for larger cutters

Dave Halford05/05/2021 17:40:38
1446 forum posts
12 photos

Southbend to a Myford .......... Nope, still don't get it.

Matt Stevens 105/05/2021 18:22:30
90 forum posts
8 photos

Dave - The Southbend i have is a 1939 Model C....so no QCGB, No reverse, no power cross feed, bed getting worn, no way to mount attachments to the cross slide (i.e. no T-bolts), less speed range, less tailstock feed etc. These are all advantages to the Myford which is much younger, in great condition and like i said - purchased at a good price.

Steve - I did watch your video, i see you machined down the top of the top slide quite a bit. I am not keen on that particularly, but perhaps modifying the tool holders is an option.

Jason - Understand your point about rigidity, however is it any different than using smaller tooling anyway? i.e. are they just comparable?

So it seems the main options are a) Buy all new tooling (expensive) or b) get a new QCTP suitable for a Myford with 12mm tooling or c) mill down my tool post holders so they will sit lower.

Perhaps option b) is the cleanest way to go and then when i sell the southbend, i can increase the cost by $100 to help offset. Any other ideas or am i concluding the right way?

Mike Poole05/05/2021 18:38:01
avatar
Moderator
2968 forum posts
70 photos

The top slide is superfluous much of the time so a bolster to just fit your tool post could be made. Refitting the top slide is a quick job when required. The potential increase in rigidity could help to maximise the cut taken with the larger tool bits. The Gibraltar tool post from Hemingway is designed to take large tool bits and maximise rigidity and depth of cut but only for a single tool.
Mike

Michael Briggs05/05/2021 18:56:18
213 forum posts
9 photos

I would not compromise the rigidity of the top slide to accommodate oversize tooling. I would either take Mike's advice, or reduce the height of the tooling.

Michael

Matt Stevens 106/05/2021 02:26:24
90 forum posts
8 photos

Has anyone come across this solution?

**LINK**

Its advertised for the ML7, but i assume the topslide is the same between the ML7 and Super 7?

It also claims on this page that the slide can be milled to allow the usage of 1/2" tools in a QCTP....anyone seen these or got experience of them?

**LINK**

Matt Harrington06/05/2021 10:50:33
avatar
179 forum posts
7 photos

 

These guys claim their topslide casing is used for all '7's:

**LINK**

 

I always thought the ML7 topslide was of a different size. I'd be interested to know for sure....

Matt

Edited By JasonB on 06/05/2021 12:24:38

All Topics | Latest Posts

Please login to post a reply.

Magazine Locator

Want the latest issue of Model Engineer or Model Engineers' Workshop? Use our magazine locator links to find your nearest stockist!

Find Model Engineer & Model Engineers' Workshop

Latest Forum Posts
Support Our Partners
ChesterUK
Warco
JD Metals
emcomachinetools
cowells
Eccentric July 5 2018
Eccentric Engineering
Subscription Offer

Latest "For Sale" Ads
Latest "Wanted" Ads
Get In Touch!

Do you want to contact the Model Engineer and Model Engineers' Workshop team?

You can contact us by phone, mail or email about the magazines including becoming a contributor, submitting reader's letters or making queries about articles. You can also get in touch about this website, advertising or other general issues.

Click THIS LINK for full contact details.

For subscription issues please see THIS LINK.

Digital Back Issues

Social Media online

'Like' us on Facebook
Follow us on Facebook

Follow us on Twitter
 Twitter Logo

Pin us on Pinterest