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Old 01-25-2009, 02:38 PM
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Retmachinist Retmachinist is offline
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Join Date: Oct 2008
Location: Urbandale Ia
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Default Re: milling question

Originally Posted by Creative Engineering View Post
I think he's talking about the pedal crank shaft.

I've got the 3 piece set-up on my Spoilers. The shaft is square and tapered at the ends 2-3 degrees.

The hole in the crank has a corresponding square, tapered hole so that the crank is forced onto the taper for a positive fit. There is a bolt that draws the crank onto the shaft.

O.K. I am with you guys now. I thought at first he wanted to cut a tapered square hole through the bottom bracket, just tapered at one end. I couldn't figure out what you could use it for.
Got it now.

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