lathe gear

[dieselsamurai]

This looks interesting...

3D Printed Mini Lathe by AdamWilki

11/12/2024 Update - I have added two files:Toolpost Base - Brass Leadscrew Nut.stl - This allows you to use any 8mm leadscrew - specifically I am now using a leadscrew with a finer pitch and reverse thread...

www.thingiverse.com

Pretty cool shame the design didnt incorporate a tailstock though

 

[daedalusminos]

I have actually ordered one of the chinese 10mm ones with skimming it down in mind , but dont know how i'll get on sorting centre shape out.

Hopefully you've sorted this out by now, but I would use the the centre from your original by machining off the teeth and a bit more, then bore your replacement to make a ring gear which you can heat shrink/press on to the 'core'. If you're concerned about how secure it is then a few spots of weld will suffice.

 

[dave h 2]

Hopefully you've sorted this out by now, but I would use the the centre from your original by machining off the teeth and a bit more, then bore your replacement to make a ring gear which you can heat shrink/press on to the 'core'. If you're concerned about how secure it is then a few spots of weld will suffice.

Given a lot of gears are cast iron which is not very keen on taking any tension. The universal method is to bore the 'ring gear' to a running fit so that Loctite 603 can be used. Then drill and tap m5 or m3 and screw the join at 3 points.