Colchester bantam gearbox

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

I'd call that a sliding dog.

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!.

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

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.