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Old 06-04-2007, 09:58 PM
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Machining V-Groove Pulleys - Is it Ok?

is it acceptable to put steel V-groove crankshaft and water pump pulleys on a lathe and cut the V-groove deeper in an effort to allow the belt to sit deeper so it is less likely to fly off? I'm thinking of doing it unless you guys say it's a bad idea. I'm talking about standard V-groove pulleys not "deep" V-groove pulleys.

thanks

Lee

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Old 06-04-2007, 10:44 PM
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Most likely there's not enough material available to allow the pulley to be machined deeper, at least not more than a few thousands. Actually, doing so would more than likely create a nasty safety problem. The last thing you want to happen is to have a pulley fly apart while you're setting timing.
I've never seen a belt tossing prblem that couldn't be fixed by simply doing a correct job of aligning the pullies and making sure the bracketry was not flexing.
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Old 06-04-2007, 10:56 PM
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Posted by tdkkart:
"I've never seen a belt tossing problem that couldn't be fixed by simply doing a correct job of aligning the pullies and making sure the bracketry was not flexing."

Exactly right. Use the edge of a steel straight-edge and lay it on the pulley faces. You'll find out pretty quickly where the troublemaker is. And make sure everything is mounted securely like tdkkart said. No flexing.
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