Hi all,
What's the simplest way to gear a 4,000rpm motor down to 2rpm without going in for a ready-made gearbox? (this is a DIY group, after all!) Would I be best off opting for a sequence of spur gears, or would a worm/ wheel arrangement be better - or a combination of both - or something else altogether? This needs to be something I can machine at home with the usual workshop machinery, so nothing too exotic requiring, say, bevel gears (for example).