Attaching gear to shaft

I have a steel shaft and a steel gear. The gear does not have a grub screw and I dont have access to welding equipment.

Any ideas on how I can attach the gear to the shaft?

Keyway

Whats that?

Wikipedia definition http://en.wikipedia.org/wiki/Keyway_(engineering)here.

How big is the gear and shaft? What sort of power has it got to take?

I havent got the tools to cut a groove in the shaft for a keyway :sad:

The shaft is 6mm diameter, the gear has a 6mm bore. I havent bought the gear yet but it is available in a few different sizes. Most likely be 25mm diameter.

It is for the drive to connect the driving wheels with the rear wheels for 4 wheel drive. The only ones I can find with a grub screw are plastic ones.

What I usually do is drill a hole through the boss of the gear/ sprocket and through the shaft. Tap it then add a bolt with a nylon lock nut on the other end.
Dont know if thats a good idea but I have never had any dramatic failures. Just the bolt coming undone due to not tightening it every now and then.

just tack weld it on i think that is what mario did with the speed 900s

whoops reading one post whilst posting in another, note to self, only have one window open at a time :)

(Message edited by typhoon_driver on December 08, 2008)

I think the shaft is too thin to drill a hole through, and I dont have access to any kind of welding equipment.

Hmmm. Perhaps I could glue the sprocket to the wheel hub.