JimmieS | 22/05/2018 21:04:56 |
310 forum posts 1 photos |
The course tooth set has a spindle hole dia of .875” (22mm ish), a wheel thickness of 1/2” and 8 splines– the set comprises 18, 30,33,35,42 and 45 (perhaps Colchester?) The fine tooth set has a spindle hole dia of .900” (23mm ish) with a wheel thickness of around 9mm - not all are the same - and has 6 splines – the set comprises 40,42,44,45,52,56,60,80 and 96(?) Edited By JimmieS on 22/05/2018 21:05:16 |
not done it yet | 22/05/2018 21:34:20 |
7517 forum posts 20 photos | Diameter with tooth count, or DP/MOD might help. |
Emgee | 22/05/2018 21:39:05 |
2610 forum posts 312 photos | Before checking some I have to confirm I would say one style is from a Colchester Bantam. Emgee Edited By Emgee on 22/05/2018 21:40:58 |
Thor 🇳🇴 | 23/05/2018 06:21:38 |
![]() 1766 forum posts 46 photos | Hi Jimmie, Colchester changewheels - as suggested by Emgee - were dicussed here, there is also a photo. Thor |
JimmieS | 25/05/2018 20:52:54 |
310 forum posts 1 photos | Many thanks to all who replied, especially Thor for directing me to an earlier posting. Using the number of teeth/diameter formulae the course tooth set is 16DP which, according to the late Sir John is ‘early Colchester’s, round head etc 16 DP splined bore, some 6 some 8.’ The finer tooth wheel I get a 25DP and has 6 splines.I have checked the net without success for possible user. Anyone have thoughts? Jim |
not done it yet | 25/05/2018 23:44:54 |
7517 forum posts 20 photos | 25DP/. That is unusual. I can’t recall a 25DP involute cutter. Possibly a metric gear? |
JimmieS | 27/05/2018 15:43:19 |
310 forum posts 1 photos | Hi not done it yet. Many thanks for the reply. When I checked several of this set the calculations came out between 25.2 and 25.5 with one at 25.8... I assume the deviations came from my measuring..Have rattled my memory I think (!) the set may have come from a 'shop which got a Boxford T series in the early 1980's. This would, of course, have been metric. Jim |
JimmieS | 19/06/2018 09:42:55 |
310 forum posts 1 photos | Apologies, just realised I forgot to post my reply from Boxford re above gears - 'they are from a manual X10 lathe'.And a '5 Star Award' to Gary B at Boxford for going to the trouble of finding out. Thanks to all again. Jim |
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!
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
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.