Member postings for chris bale 1

Thanks for the reply's

im missing a few of the gears, what i have are 60,2x20,65,63,30 and the back gear arrangement, you are correct with it being 8tpi just had a double check. Armed with a 3d printer ive managed to run off a few of the gears i dont have as a temp measure

Anybody know of a chart for change gears on a 10Tpi drummond:B leadscrew?

Currently on ebay past my price limit!

https://www.ebay.co.uk/itm/284518927261?hash=item423ea64b9d:g:wQEAAOSw6IJhhpek

Have you looked at freecad? Seems to be quite a few guides on youtube. Just save your work often as it can crash unexpectedly.

Yes the banjo, last photos didn't upload so reuploaded.

Its the one with the screw feed at the front, still unsure of the model

I'm after a bit of info if anyone has one, i need a few dimensions from the gear fork of a little drummond, to help get this lathe running again, my intension is to make a 3d printed version as a mock up to prove, then maybe make a 2part piece from 2 bits of ali, round stock and a bit of plate. Made a quick sketch on freecad. Proberbly a bit much but here is hoping, thanks in advance.

I need:

the angle between the forks

the length of the slots

A rough distance of the start of the slots from the center of the fixing boss

The distance of where the shoulder bolt/gear bolts are in relation to its mounting boss machined face on lathe bed. Seems to be inline with the recess around the boss.

Best just find 1 10thou sheet and cut it 5 times! Or 2 .020s and a .010 if it really has to be 051 add a .001 too, by the time you have stacked them to .050 you will possible have too remove 1 of the 10s and swap for a 5-6thou.

Cromwell tools list .8 and .5mm at 30£ each for a roll or imperial mixed various from .001 to .015 6x12 sheets for 56£

I figuerd the top bar was a hand rest while you peered closely at what you machined with your right hand while holding yourself steady with the left as you bobbed up n down. Just my theory after hearing it went on a boat and had a treddle

An 8 Tpi screw would give .125 per rotation, where as 10Tpi is 100 thou per rotation with 100 divides, would 8tpi not be a metric thread coming in at a 3mm pitch?

Could the M not mean metric version? This would be about the time the french were pushing for us in the uk to go metric but due to war efforts going metric didn't make sense, any thing that was canibalised or stolen had to be remachined to be used as the tollarences were off, nothing would fit from uk stuff to german stuff, being allied with the usa ment things coming in were still imperial and to our tolarences allready.

I added another photo of the end of the bed and the half nut config! seems tight so he did a good job as there is no backlash in it.

Thanks to all who answerd

Picked this lathe up from an old boy who sadly passed away mid retoration, before i picked it up.

Is anyone able to identify it? It has 10Tpi screws, headstock thread look to be 8Tpi only have 1/2inch to measure off! Some parts are custom non standard. The bolts seem to be UNC might not be standard though.

Motor and belt pulleys are there but no frame work to mount these, there is nothing left of what mounts any of the change gears.

Any help would be great, thanks in advance.

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