45 flywheels with a ridge at the end of the taper?

[T. Cotten]

Just found verification in Palmers second addition. Page 344. 1937-73 45 motors. Pinion/Sprocket shafts 85-125 lbs. Crankpin 60-100 lbs. I just did mine last week with all around 85-90 lbs.

Its so easy to confuse me, Buster,...

Although its been a quarter century, I sure thought the mains were smaller than the crankpin on a 45".

(After all, its the one that does all the work!)

....Cotten

[joe fxs fxr]

I'm no expert, but my engineering background thinks the sprocket (and to a lesser extent, pinion) shaft taper has to resist twisting and spinning in the flywheel where the crank pin is only side loaded, and just has to resist misalignment of the wheels.

[T. Cotten]

I'm no expert, but my engineering background thinks the sprocket (and to a lesser extent, pinion) shaft taper has to resist twisting and spinning in the flywheel where the crank pin is only side loaded, and just has to resist misalignment of the wheels.

If you want to break loose a taper, Joe,...

You shock it.

There's more from pounding pistons than from chain snatch.

(But come to think of it, I've never found a loose taper in any motor, ever. Just skewed a bit.
The loose tapers were all in the drivetrain!)

....Cotten