So this quick update is mostly to ask about gears, sprockets, and how to mount them, but first, an update on the new machine. Barróg Doom should be constructed a lot quicker than the original, with the base, back and sides being cut in the 30 minutes I had free last weekend to work on it.


A shot of the new walls, placed next to one of the old ones to give a sense of scale.

My main question to all of the builders on the forum is on the matter of mounting sprockets, gears and axles. I've purchased all of the relevant gears and sprockets off of Beltingonline.com, but I was hoping to ask for advice on how to mount them. I'm planning to use 10mm rods for all but the largest gear, which I was going to use a 25mm steel pipe similar to Giles Ruscoe's Mantis. What are common ways to mount these gears to the axles, and how to mount the axles to the bulkheads? What steps can I take to avoid the gears from misaligning? Should I use bearings and, if so, what kind? What would be the recommended way to machine these parts to minimize loss in strength while improving weight efficiency? Should I use the 10mm rods, or go up, or even down?

Any help people can chip in with this would be much appreciated, thanks in advance.


The parts in the flesh. Definitely bulkier than they need to be, but it's in how much should be shaved off that I don't know.


All of the parts seen from an angle. I'm thinking securing the sprocket to the small gear may be good, though space would need to be left of course for the chain.


A side on view of the transmission system.