Tonight I cut some spokes in one of my test wheels. I was most interested to see if the wheel gets floppy if you take away most of the material in the centre to replace it with plastic. It doesn’t. But I tell you what: fretting out the spokes is hard work! On this small wheel, it’s nearly impossible to get anything into the holes … Continue reading Dave Booth is a demon with a jewellers’ saw
My puttering with the form tool is starting to result in things that could be mistaken for wheels. These ones approximate the 30″ wheels for 622’s pilot truck, but with the gross flange of my homemade form tool. I faced them down to the correct 1.63 mm wide, and cut the spoke recess in the front to see how they will behave on an (admittedly … Continue reading Quite wheelish
A rather large box of air arrived from Shapeways today. Safely suspended inside were the masters for 622’s wheels. Seriously, the box is over 4000 cubic centimetres of air, and contained perhaps 2 cubic centimetres of plastic! The castings were well protected! No box from Shapeways has ever lasted more than a few minutes after I arrive home, and this was no exception: I couldn’t … Continue reading Wheel masters
I may have been a trifle optimistic about finishing the learning phase before 20 hours are out. I’m still discovering how to hit a given diameter with a form tool. It seems to be equal parts art and science. My approach is pretty much to make each tyre individually. Sure I take note of where the flange was cut completely on the first tyre and … Continue reading Sneaking up on tyres
I’m a little over ten hours of practice into learning to use my lathe. To tell the truth, I don’t think I will need the full twenty hours I’d planned. Already I can do most of what I need to be able to do to cut wheels. Wrecking my only Proto:87 form tool would make for a bad day, and so, I ground a tool … Continue reading Vaguely like wheels
Last night’s lathe practice was about making my own tools. All 622’s wheels need a ridge at the edge of the tyre, and so, I made a little boring tool to create that. Once done, I tried it out and made the test wheel shown here. The wheel is the size of 622’s engine truck wheels, minus the flange. I was surprised by how small … Continue reading 30 inch wheels are small!
I’m planning a two millimetre axle for the 30-inch pilot wheels. The wheel hub comes out pretty heavy with 3/4 mm walls, but I daren’t go finer. Indeed, I will have to test to see if I can even turn such a fine wall. Continue reading Pilot wheel drawing
