Additional screw cutting quick change gearbox

**LMMasterMariner** · Nov 7, 2021, 02:51 AM

Finally made this very important lathe modification.

This lathe (G0602 type) already has a built-in gearbox for all metric pitches from 0.25 to 3.5 millimeters. Also all imperial pitches in the range 8 to 72 TPI, but I don't need them. But to do that and also to change to power feed pitches it is required to use change gears. Not too complicated, but it is time consuming.

27-tooth and 60-tooth change gears is the option which gives the finest pitches. Nine of them. Combined with 5 different pitches from new gearbox it makes 45 pitches. As it can be seen from threads @ feeds chart there are all metric pitches in the range 0.25 to 3.5 mm available without use of any tool. Pitches can be changed in a few seconds

Materials used:

steel plate 10mm, 12 mm
steel round pipe 3" dia
various gears 45# steel
stainless steel shafts dia 14mm
6201 ball bearings
4 washers (made from 1 HRK coins) spacers between gears
Aluminum 6061

Cheers
LMMasterMariner

**DIYSwede** · Nov 7, 2021, 03:00 AM

Welcome back again, with yet another amazing build, LMM!
Personally, I had to run the video at 50% speed, and stop occasionally to try grasping your design considerations and set-ups!
Well worth the time, though and some really good food for thought for me!
Next tool of the week, perhaps?

All the best!
Johan

**LMMasterMariner** · Nov 7, 2021, 05:02 AM

Thanks for nice words, DIYSwede,

Yes. It is better to watch some parts with reduced speed. I wanted to make video clip shorter than 10 minutes and some parts, like making of the shaft, are even running at 12 x speed.

Cheers
LMMM

**DIYer** · Nov 7, 2021, 06:27 AM

Thanks LMMasterMariner! We've added your Quick Change Lathe Gearbox to our Lathe Accessories category,
as well as to your builder page: LMMasterMariner's Homemade Tools. Your receipt:

Quick Change Lathe Gearbox by LMMasterMariner

tags: lathe, gears