Source for Offset Woodruff Keys?

[bulletpruf]

Sheared a woodruff key off in my 036 yesterday; I had ground it down -.020. I'm almost certain it's because I didn't torque it enough, but I'd prefer to have an offset key. I see some listed for sale, but nothing in the correct size of 2 x 3.7.

Is anyone aware of a manufacturer for these?

Thanks

 

[Matt Ellerbee]

McMaster-Carr?

 

[ammoaddict]

Sheared a woodruff key off in my 036 yesterday; I had ground it down -.020. I'm almost certain it's because I didn't torque it enough, but I'd prefer to have an offset key. I see some listed for sale, but nothing in the correct size of 2 x 3.7.

Is anyone aware of a manufacturer for these?

Thanks

You actually don't even need the key. Just line it up where you want it and torque it down. The key is only for alignment, the tapers of the shaft and flywheel is what holds it in place.

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[bulletpruf]

You actually don't even need the key. Just line it up where you want it and torque it down. The key is only for alignment, the tapers of the shaft and flywheel is what holds it in place.

Sent from my moto g(7) power using Tapatalk

I hear you, but here's what is giving me trouble - once you shave .020 off the key, the flywheel obviously can move .020 each way. And if I'm not mistaken, you have to move the flywheel counterclockwise .020 to advance the timing. So, I stick a starter cord in the cylinder to lock the piston, then turn the flywheel counterclockwise until the piston is locked and it's advanced .020. From there, I'm tightening clockwise on the flywheel nut to tighten it. I only tightened as tight as I could while holding the flywheel in my hand because I was worried that the flywheel would turn clockwise .020, negating any timing advance. Obviously I didn't tighten it enough, because it spun off shortly thereafter.

Should I just tighten normally once I have it tight as I can get it by holding the flywheel?

Thanks

 

[Stump Shot]

Should I just tighten normally once I have it tight as I can get it by holding the flywheel?

Yes

 

[ammoaddict]

I hear you, but here's what is giving me trouble - once you shave .020 off the key, the flywheel obviously can move .020 each way. And if I'm not mistaken, you have to move the flywheel counterclockwise .020 to advance the timing. So, I stick a starter cord in the cylinder to lock the piston, then turn the flywheel counterclockwise until the piston is locked and it's advanced .020. From there, I'm tightening clockwise on the flywheel nut to tighten it. I only tightened as tight as I could while holding the flywheel in my hand because I was worried that the flywheel would turn clockwise .020, negating any timing advance. Obviously I didn't tighten it enough, because it spun off shortly thereafter.

Should I just tighten normally once I have it tight as I can get it by holding the flywheel?

Thanks

I align mine up where I want it, put a socket over the crankshaft onto the flywheel, and give it a firm smack with a hammer and then tighten the nut.

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[Michpatriot]

On the subject of it moving when tightening..after I set the fly wheel on the crank, before putting the nut on, I take a small piece of aluminum tig wire (wood toothpick would work) and I jam it in to the space between the key and keyway that is there on a thinned key...prevents moving the timing when tightening the nut..or you can just hold the flywheel in the perfect position against the filed side of the key, and give it a light smack to seat it on to the taper..

 

[drf256]

A cordless impact driver works well to preset torque on nut, then I spin it clockwise from the nut and use a rope as a piston stop. Tighten to 27 ft/lbs. Never a problem yet.

 

[bulletpruf]

Thanks for all the input! I'll give it another try.

Scott

 

[Michpatriot]

I've always felt safer using recoil rope instead of a plastic piston stop..my reasoning is that the rope distributes the stresses over a larger area..

 

[tek9tim]

I align mine up where I want it, put a socket over the crankshaft onto the flywheel, and give it a firm smack with a hammer and then tighten the nut.

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I can't tell you how many saws I've done this on, never spun a flywheel, never had it move from where I set it.