jr dragster T
New member
No keyway? CNC is all you need!
I've cut my own keyways as has Mr. Kibble. Just takes patience and a steady hand with a Dremel....you don't need CNC to mill a simple keyway.
Just takes patience and a steady hand with a Dremel.
And it works very well, haven't had any issues with mine at all. Machine shop wanted $250.

Bolts up with threaded hole in crankshaft. Hence the built in key.
Not necessarily. I have shafts that are threaded, others are not.So an engine with a keyway is GOING to have a threaded hole?
Cotmullion That picture on page one that you posted looks like the taper for the flywheel. Clutch cannot mount there.
Cotmullion That picture on page one that you posted looks like the taper for the flywheel. Clutch cannot mount there.
Lets see your engine.
Or more like "Let's see your shaft"...Eww gross.![]()

I'd just measure the smallest part of the taper. If its 5/8 or a bit larger then good. Start engine and get a angle grinder and take the taper right down to a 5/8 shaft. Cut a keyway and there you go. Bit crude but I have seen it done.
Lol yeah..You make it sound like "Not everone has a angle grinder" Most people involved with this kind of stuff would own one. Plus even if you didnt have one you can get one for like $25.LOL GHETTO LATHE!, make sure its bolted down good and solid. DOnt need an angle grinder, a hand file will do or a sanding block, just take a lil bit at a time off.