|Peter Newton 3||12/11/2019 23:10:42|
|1 forum posts|
Hello. I'm a new member and am at present attempting the restoration of a Ragan Little John lathe. A 6" chuck came with the lathe - with the wrong backplate, which has a 1.75" 'V' form thread and not the square (6 tpi) the Raglan needs. Someone mentioned a member on the forum enquiring about a backplate (1.75" diam with BSF form?). Does anyone know of the member?
regards. Peter Newton
|not done it yet||13/11/2019 09:12:33|
|3556 forum posts|
I very much doubt that a lathe with 6tpi Whitworth or Unified thread would have the same register dimensions. Possible, I suppose, if you are looking to sell. Check out the wanted section on the forum.
Bore out and sleeve it, if there is sufficient metal to do so. Then recut with a square thread.
I see second hand Raglan back plates selling for around £60 delivered, on epay. They are easy enough to make - and one would be confident there is sufficient metal to safely cut another spigot.
There are threads, for making spindle nose protectors, on :
|Pete Rimmer||13/11/2019 12:34:05|
|472 forum posts|
If you want to make a Raglan backplate/faceplate by re-purposing one from another lathe you'll need to find on with a sufficiently wide boss yet an existing thread of 1.5" or less to allow enough material to cut the 6tpi square thread.
A Boxford one would suffice, if the rear boss is wide enough to accommodate the Raglan thread.
|old mart||13/11/2019 19:33:09|
|785 forum posts|
Smart & Brown use a 1 3/4" X 8 W spindle thread, with a 1 3/4" diameter register.
Please login to post a reply.
Want the latest issue of Model Engineer or Model Engineers' Workshop? Use our magazine locator links to find your nearest stockist!
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.