Pendulum Cut Crank

**Mystery Bird** · 11-08-2012, 08:12 AM

Not sure yet, want to see how the bearings look first. Had great oil pressure though.

**94Blackbird** · 11-08-2012, 06:15 PM

Originally Posted by dawdaw

Isn't a pendulum cut crank the same as a knife edged crank, where they cut counterweights to a sharp edge?

Negative, pendulum cutting is where they remove material from the counter wieghts make the them lighter. From what I've seen they try to do that as close as possible to the actual throws of the crank without actually removing material from the throws. The only thing knife edging refers to is rounding the edges of the counter weight so that there is less friction as the counterweight moves through the air and oil spray of the crankcase.