Hello again everyone.

To answer your question Harry, I have no access to CNC at all, so cutting out a keyway accurately is practically a no go for me, unless I can find a service near me (Sheffield... funnily enough, should be easy considering that it used to be the city of steel... still is but I don't know...) that can make them for cheap (yes I know, cheap and robot doesn't exactly go well together, but 101 only cost a pound and a penny... probably coz Mike Franklin had some CNC stuff with him, but I digress once again.). As for welding them on, I would like to be able to remove and replace sprockets and/or axles if things go awry, so welding them is also a no go.

Unless there's a way for me to accurately make a keyway and key by hand, then more than likely it'd end up with me using screws.

NEW QUESTION, and it's back to the shaft so to speak... jesus I need to really think my words out when typing this up...

So I've been hunting around on bearingshopuk for the silver steel axle, flanged oilite bushes and the sprockets, the sprockets I've already made my mind up about, along with the bushes. The question is, will a flanged oilite bush to this size (7/8 inch bore) accommodate a silver steel axle (22 mm diameter) this size without it all shaking too much, and will it be able to keep the bush in place so that it doesn't come out in the middle of testing/battle? Or will I have to find another silver steel supplier that does it in metric instead of imperial?

Don't worry, both links go straight to bearingshopuk. Should do at least anyway.

Thanks again.

DJ.