Fitting a bicycle freewheel onto a threaded axle/rod?

G

George

New member
I am building a large remote control car, and want to drive a rear axle connected to 2 bike wheels with a 31cc engine. I plan on fitting a sprocket to the engine, and then a freewheel to the middle of the axle connecting the 2 rear wheels. How thick would I need to have the axle and how would I attach the freewheel to it? I was planning on getting a threaded freewheel and cutting a threading the axle to fir it on.

I want to use a freewheel, as then I can also attach a derailleur to allow me to use the gears on the freewheel, allowing the car to go faster.

Thanks
 
Just get the combined sprocket and freewheel block and check the thread from that. Modern bikes don't commonly use threaded freewheels and those previously used may vary from country to country. Your local cycle dealer can advise you best.

Note however that you should not attempt to drive both rear wheels on a solid axle. You can only drive the left rear wheel with the sprockets. The right rear wheel must be free to rotate on its own on the axle. The alternative would be to use such a differential gear as is sometimes fitted to tricycles; then you could take drive to both rear wheels.
 
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