By continuing to use this site, you agree to our use of cookies. Find out more
Forum sponsored by:
Forum sponsored by Forum House Ad Zone

Small MT2 Tailstock Chuck for ML7

All Topics | Latest Posts

Search for:  in Thread Title in  
Dr_GMJN28/01/2022 10:21:32
avatar
1602 forum posts
Posted by Michael Gilligan on 28/01/2022 09:37:18:
Posted by Dr_GMJN on 28/01/2022 08:25:44:
Posted by JasonB on 28/01/2022 07:19:19:

[…]

Has the Myford got a through hole […]

Yes, the tailstock MT2 taper is hollow if that’s what you mean? […]

.

Hence my [presumably inappropriate] suggestion, yesterday.


MichaelG.

Sorry Michael, I thought you suggested a method of using a hollow MT2 taper and making some kind of sliding arrangement, or the tailstock mechanism you linked to. You didn't mention a collet?

Jason I think was suggesting a simple tailstock collet to hold the ARC supplied sensitive chuck - thus reducing overhang and weight of having a second chuck to hold the first?

Unless I've misunderstood, these are two completely different concepts in terms of cost and complexity?

JasonB28/01/2022 12:07:03
avatar
25215 forum posts
3105 photos
1 articles

Yes an MT2 collet closed by a simple cobbled together draw bar would hold the attachment with minimal overhang.

IanT28/01/2022 12:13:55
2147 forum posts
222 photos
Posted by Dr_GMJN on 28/01/2022 08:25:44:
Posted by JasonB on 28/01/2022 07:19:19:

Has the Myford got a through hole so you could use a MT2 x 1/2" collet

Yes, the tailstock MT2 taper is hollow if that’s what you mean? Presumably I’d need a draw bar then? Thanks.

When I first obtained my 'sensitive' drill chuck - I used it held in an MT2 - 1/2" end-mill holder (the tool itself being secured by a grubscrew) to mount in my S7s tailstock - and it worked fine without a drawbar. It also helped to extend the device over the cross-slide btw. There's enough 'grip' in a well fitting MT2 taper to not mind the sprung drill being moved in & out. My issue with the device was that mine had a lot of slop when extended.

You could buy the device and fit it into a MT2 blank arbor by drilling the arbor to suit the diameter of the sliding part of the chuck mount but that would seem a relatively expensive approach to the problem...

Regards,

IanT

Dr_GMJN28/01/2022 12:18:42
avatar
1602 forum posts
Posted by JasonB on 28/01/2022 12:07:03:

Yes an MT2 collet closed by a simple cobbled together draw bar would hold the attachment with minimal overhang.

Yep, that combination sounds exactly what I was after.

For the drawbar I expect a rod threaded at one end for the collet, and a hollow stepped brass plug to fit into the other end of the tailstock ram would do. Then make some kind of tommy bar thing to turn it?

The job I have in mind is the 0.25 mm diameter hole in the apex of the aluminium cones I mentioned on another thread. I have some PCB drills, so the ARC key chuck capacity should be OK, although it's a shame it doesn't close further.

JasonB28/01/2022 12:28:32
avatar
25215 forum posts
3105 photos
1 articles

I'd put the hole into the faced off bar not try and drill the apex. Turn the taper after drilling.

Dr_GMJN28/01/2022 13:18:12
avatar
1602 forum posts
Posted by JasonB on 28/01/2022 12:28:32:

I'd put the hole into the faced off bar not try and drill the apex. Turn the taper after drilling.

Yes, I was just describing the end result rather than proposing trying to drill at an apex.

Michael Gilligan28/01/2022 13:18:37
avatar
23121 forum posts
1360 photos
Posted by Dr_GMJN on 28/01/2022 10:21:32:
Posted by Michael Gilligan on 28/01/2022 09:37:18:
Posted by Dr_GMJN on 28/01/2022 08:25:44:
Posted by JasonB on 28/01/2022 07:19:19:

[…]

Has the Myford got a through hole […]

Yes, the tailstock MT2 taper is hollow if that’s what you mean? […]

.

Hence my [presumably inappropriate] suggestion, yesterday.


MichaelG.

Sorry Michael, I thought you suggested a method of using a hollow MT2 taper and making some kind of sliding arrangement, or the tailstock mechanism you linked to. You didn't mention a collet?

Jason I think was suggesting a simple tailstock collet to hold the ARC supplied sensitive chuck - thus reducing overhang and weight of having a second chuck to hold the first?

Unless I've misunderstood, these are two completely different concepts in terms of cost and complexity?

.

Just to be clear … What I was suggesting [and the reason behind my using those selective quotations] was to bore a MT blank to accept a free-sliding shaft which accepts watchmaker’s collets. The mechanism shown in the Bergeon example is, to my mind, ‘optional’ … at small diameters, pushing with a fingertip should suffice, and is the most ‘sensitive’ feed mechanism available.

MichaelG.

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

Sign up to our Newsletter

Sign up to our newsletter and get a free digital issue.

You can unsubscribe at anytime. View our privacy policy at www.mortons.co.uk/privacy

Latest Forum Posts
Support Our Partners
cowells
Sarik
MERIDIENNE EXHIBITIONS LTD
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

 

Donate

donate