Saturday, December 22, 2012

Pulley fever

I need a large pulley for the transmission on the motorized bike, but they're hard to find, and why buy what you could build?
I took the crank pulley from one of my spare Nissan Z-car motors.

But it's very heavy cast steel and has two grooves when I only need one. So I used a DeWalt angle grinder with a cut-off wheel slipped into the small gap between the pulleys to separate them.

It took a while, and because the cut was so deep and narrow the wheel had almost no room to move or tweak.

Now I have two pulley rings, next I have to make one of them mate to the axle of the bike.

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