Extending Crankshaft

[Justin67]

I am trying to install a torque converter on my go kart. The torque converter is for a 1" crankshaft. I don't have enough keyway to install it so I thought to maybe extend the crankshaft. Im already spacing the torque converter off from the engine with a wooden block because the crankshaft is very thick and not keyed right where it comes out of the engine. Any thoughts on how to attack this problem?

 

[Kaptain Krunch]

Think of the leverage on your crankshaft...i would strongly suggest not using a block of wood behind that torque converter either. Get a different engine, or get a different crank.

 

[Dingocat]

Think of the leverage on your crankshaft...i would strongly suggest not using a block of wood behind that torque converter either. Get a different engine, or get a different crank.

Or get that one turned down.

 

[Justin67]

Think of the leverage on your crankshaft...i would strongly suggest not using a block of wood behind that torque converter either. Get a different engine, or get a different crank.

For the torque converter, the first part you put on to the crankshaft of the drive pulley takes up 1.320" of the shaft available. The next keyed part that goes on is the thing that slides in the middle of the drive pulley. For that part, is 0.200" enough keyway for it? thats all I have left. Im just considering maybe yes because its just an extension of the keyway from the first keyed part of the drive pulley. I also dont have a place near or the money to turn it down.

 

[anickode]

Disassemble the engine and either source a used crankshaft from eBay or have the rest of that one turned down.

If you're very VERY careful, you can bolt the engine down to a very solid surface, run it at idle, and use a grinder with a flap disc to reduce the diameter of the back part. You risk ruining your crankshaft doing this though, as it will tend to want to go egg shaped.

Wood chipper or push blower engine?

 

[Justin67]

Disassemble the engine and either source a used crankshaft from eBay or have the rest of that one turned down.

If you're very VERY careful, you can bolt the engine down to a very solid surface, run it at idle, and use a grinder with a flap disc to reduce the diameter of the back part. You risk ruining your crankshaft doing this though, as it will tend to want to go egg shaped.

Wood chipper or push blower engine?

Its off a snow blower. I a Tecumseh 10HP Hmsk100. Its on my go kart though.

 

[Kaptain Krunch]

For the torque converter, the first part you put on to the crankshaft of the drive pulley takes up 1.320" of the shaft available. The next keyed part that goes on is the thing that slides in the middle of the drive pulley. For that part, is 0.200" enough keyway for it? thats all I have left. Im just considering maybe yes because its just an extension of the keyway from the first keyed part of the drive pulley. I also dont have a place near or the money to turn it down.

I personally wouldnt consider extending the crankshaft as an option.

A torque converter, is essentially two pulleys playing tug-o-war. Putting all the belt tension, on the end of the crankshaft, that you are trying to extend, is a recipe for disaster.

 

[Budget GoKart]

On of the other members paid for a keyed sleeve they are inexpensive and if you could have the crank turned down then you can sleeve it