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I discovered (some time ago) a simple way to make plastic gears. DSCN0196 by aardvark_akubra, on Flickr A plastic blank is mounted on the lathe spindle and a steel gear of the required gear 'family' is mounted on a spindle on the tool post. The size of the steel gear is not important...

Maybe, the problem with vacuum, flame eater, atmospheric engines? Atmospheric engines under various names and configuration are popular home shop projects and many seem to be a real challenge to get to run. One of the popular types is the 'flame licker' where a port opens and hot gases are...

Worm and peg wheel by aardvark_akubra, on Flickr My first attempt at a power feed for my mill worked OK but the aluminium worm wheel had a very short life, perhaps due to my not being able to make a highly polished surface on the worm I was using, so I tried another approach, this time it is...

...it looks a bit rough but it does work! Now I need to make a PWM controller for it and tidy things up a bit.. http://flic.kr/p/bb5py2 The motor is from a computer mag tape drive (about 35 years old), I made the worm and wheel and the rest is 9mm aluminium plate, also from the old tape...

ER32 collet chuck for D1-4 mounting... One would think a suitable chuck would be readily available but I have failed to find one, they were available in the UK but not anymore, apparently. Nothing to do but adapt something, so I started with a rather too large back plate: IMGP9441 by...

...I have been messing around looking for ways to improve on the typical "solenoid engine". One avenue I have been researching is the best way to add permanent magnets to the 'piston' with the object of gaining a longer power stroke. My best configuration so far is to make a soft iron/steel...

IMGP9196 by aardvark_akubra, on Flickr I have a Drummond 3 1/2" flat bed lathe from about 1908. It has bronze bearings with oil cup lubrication. My next task is to rig up a motor for this and I would like indications on the maximum speed I should allow for in my drive system. Spindle is about...