By continuing to use this site, you agree to our use of cookies. Find out more
Forum sponsored by:
Forum sponsored by Allendale July 23rd

Colchester bantam gearbox

Screw cutting gearbox issue

All Topics | Latest Posts

Search for:  in Thread Title in  
Tim Watkiss31/10/2018 16:34:42
3 forum posts
2 photos
Hi this is my first post on the website so hello to everyone, I am looking for advice about my colchester bantam lathe it is a mk1 two speed machine and had an issue with the leadscrew not working when I bought it. Does anybody have a manual and parts list for this machine? I am in need of a small part for the screcutting gearbox but I don't know what it is called but it is a link which connects two gears together, its a bit like a washer with two teeth either side which are 180 degrees apart on each side and offset by 90 degrees with the ones on the other side - apart from this the gearbox is fine and I can fit it up if I get the part.
Cheers
Tim
Mark Davison 101/11/2018 19:56:33
41 forum posts
11 photos
Just got a single speed one myself. Manual is https://wiki.edinburghhacklab.com/_media/colchester_bantam_full_manual.pdf There is a small clutch on the lead screw, is that engaged. Next to gearbox.

Edited By Mark Davison 1 on 01/11/2018 19:58:31

Pete Rimmer01/11/2018 21:34:34
368 forum posts
12 photos
Posted by Tim Watkiss on 31/10/2018 16:34:42:
Hi this is my first post on the website so hello to everyone, I am looking for advice about my colchester bantam lathe it is a mk1 two speed machine and had an issue with the leadscrew not working when I bought it. Does anybody have a manual and parts list for this machine? I am in need of a small part for the screcutting gearbox but I don't know what it is called but it is a link which connects two gears together, its a bit like a washer with two teeth either side which are 180 degrees apart on each side and offset by 90 degrees with the ones on the other side - apart from this the gearbox is fine and I can fit it up if I get the part.
Cheers
Tim

I'd call that a sliding dog.

Tim Watkiss01/11/2018 23:15:31
3 forum posts
2 photos

dsc_0164.jpgdsc_0163.jpg

These are the pictures of the broken coupling and the gearbox, the broken coupling joins the two gears together on the right hand side of the middle shaft which will in turn drive the gear on the right hand side of the top shaft which will turn the leadscrew. I also need to get a part for the ABC change lever - there is a cam shaped part which you can see in the photo but it needs another part to actually mesh the gears on the left side of the top shaft. Thanks everyone for the manual and parts list info I have part numbers for the parts I need - just need to find them now!.

Howard Lewis02/11/2018 21:04:28
2158 forum posts
2 photos

If you cannot source the part, you may be reduced to measuring the broken parts and then making a new one, always supposing that

a) The lathe is operable without the failed component

b) You have access to a mill.

Although if the lathe is operable, mounting the raw material on a vertical slide, or in the toolpost, with an end mill in the chuck. The first side should be relatively easy, but because of problems holding, the second side will be more difficult, certainly looks to me like some light cuts, .

If all else fails, throw yourself on the mercy of a local Model Engineer!

Best of luck!

Howard

Tim Watkiss02/11/2018 21:55:30
3 forum posts
2 photos

we have a lathe and mill at work so I might have a go at making the part there on sunday if we are quiet, for me the tough bit would be milling the notches on each side exactly 90 degrees apart.

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

Latest Forum Posts
Support Our Partners
Warco
ChesterUK
Eccentric Engineering
Ausee.com.au
TRANSWAVE Converters
Eccentric July 5 2018
Advertise With Us
Meridienne Sept 2019
Allendale Electronics
emcomachinetools
Subscription Offer

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