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

UK source for 17/32" ring spanner ?

All Topics | Latest Posts

Search for:  in Thread Title in  
Mike Davies 304/01/2022 14:52:18
5 forum posts

Hi,

Question as title : I have a chuck that came on a backplate that does not fit my lathe and the two are fitted together by hex screws with a head size of 17/32" (I assume it's 17/32", that or 13.5mm...). I believe these are used on some UK classic cars but am not into such so does anyone here know a source for 17/32" (or 13.5mm) ring spanners ?

If not then I will mangle the heads with an adjustable then turn the whole thing off...

Thanks,

JasonB04/01/2022 15:05:38
avatar
25215 forum posts
3105 photos
1 articles

1/4" whit may well do are they an exact imperial size or 0.525"

Edited By JasonB on 04/01/2022 15:06:36

KWIL04/01/2022 15:06:13
3681 forum posts
70 photos

1/4 whitworth in old money?

David Jupp04/01/2022 15:07:08
978 forum posts
26 photos

Depending upon origin/age of chuck, you may need a 1/4 W (also 5/16 BSF) spanner perhaps.

0.525" or 13.34mm AF

Clive Brown 104/01/2022 15:09:41
1050 forum posts
56 photos

1/4" Whitworth or 5/16" BSF spanner size is nominally 13.3 mm AF. Could it be that? If so then should be available.

Martin Connelly04/01/2022 15:42:09
avatar
2549 forum posts
235 photos

Google special spanners for English cars and motorbikes 17/32" .

Martin C

Mike Davies 304/01/2022 15:55:26
5 forum posts
Posted by JasonB on 04/01/2022 15:05:38:

1/4" whit may well do are they an exact imperial size or 0.525"

Edited By JasonB on 04/01/2022 15:06:36

Yay ! Didn't think of that - £3.50 on eBay, ordered.

Thanks to all who pointed this out and for the replies,

Nigel McBurney 104/01/2022 19:11:20
avatar
1101 forum posts
3 photos

This size 17/32 may be an old American size, 60 years ago I bought a set of Gordon ring spanners and one spanner was 25/32 never used it for years until I got interested in old stationary engines,i made some new nuts for the 7/16 dia studs on an USA made 1912 Amanco stationary engine and found that some American coarse nuts had some odd sizes across flats,I found in some old info that the USA had a large hex system similar to our large nut Whitworth system ,they seem to have abandoned their system some time before we made the changes during the early part of WW2.

Chris Evans 604/01/2022 19:33:50
avatar
2156 forum posts

Pre-war BSA motorcycles use mainly whitworth sizes with some odd ball A/F including the above mentioned 25/32"

Vic04/01/2022 21:12:49
3453 forum posts
23 photos

13mm and a file? Sorry, I’ll get my coat … laugh

Ady105/01/2022 01:26:48
avatar
6137 forum posts
893 photos

I've found that ratchet spanners and grabby sockets can always find a grip on the old imperial stuff

The small sizes under 5mm can be a pain though

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