I've just read Dave Cook's chapter in "Robot Building for Beginners" on making couplers. I have exactly such a need as he describes: a surplus gearhead motor with a D-shaft, to which I want to connect a LEGO wheel (actually, a LEGO bevel gear which will drive a gear connected to the wheel, but once you get to LEGO parts it's all the same).
Now, his solution of making a custom coupler out of nested tubing is clever and appears to be a high-quality solution. It is also, probably, just barely, within my mechanical skills to do (though I'd need to get a drill press). And it's true, as many of you know, that I am a cheapskate on a tight budget.
However, lately time is even shorter than money, and making these couplers looks like a serious chore. I'd be happy to pay a couple bucks each to save myself the trouble.
So: is there anywhere I can buy couplers on the net, for common input and output shaft sizes, for not-too-ridiculous prices?
Thanks,
- Joe