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

Stuart M.T.B. 1a

All Topics | Latest Posts

Search for:  in Thread Title in  
Michael Gilligan19/07/2021 17:10:04
avatar
23121 forum posts
1360 photos

3/32” BSW is 48tpi … which might explain why they stripped

MichaelG.

Former Member19/07/2021 17:16:05
1085 forum posts

[This posting has been removed]

JasonB19/07/2021 17:22:05
avatar
25215 forum posts
3105 photos
1 articles
Posted by Michael Gilligan on 19/07/2021 17:10:04:

3/32” BSW is 48tpi … which might explain why they stripped

MichaelG.

And why 1/8" whit at 40tpi may be better than the originally suggested M3 x 0.5 which is almost 51tpi.

Helicoils would be same pitch as the original screw so still quite fine.

BasKo19/07/2021 17:26:51
13 forum posts
5 photos

@JasonB: die screw diameter is 2.3xmm. Thus I think BSW 3/32 is the correct size. This was also the reason why I thought about rethreating as M3 because the holes needs to be drilled by 2.5mm. But then the engine would have metric and inch screws…

I also checked helicoil, but it looks like that this system isn’t available for 3/32“ threats.

JasonB19/07/2021 17:33:48
avatar
25215 forum posts
3105 photos
1 articles

If you did go with Helicils then M2.5 metric or #3-48UNC would be closest to the original screw diameter and pitch, As you say the very small whitworth threads would be hard to find a helicoil for so probably the only way to stay with 3/32" whit would be to drill out quite a bit larger and bond in some inserts with JBWeld made to fit with the 3/32" thread.

Michael Gilligan19/07/2021 17:35:55
avatar
23121 forum posts
1360 photos
Posted by BasKo on 19/07/2021 17:26:51:

[…]

I also checked helicoil, but it looks like that this system isn’t available for 3/32“ threats.

.


True … but I would personally consider a UNC HeliCoil to be a significant upgrade.

MichaelG.

BasKo19/07/2021 17:54:56
13 forum posts
5 photos

Thanks to all of you! You really helped me out!

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