Pinning a keyed Pulley??

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Jul 29, 2008 | 08:06 PM

#21

bcarp

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From: North Texas TX

A & A is in my future so I am doing it while it is apart

Jul 29, 2008 | 09:16 PM

#22

ajg1915

Race Director

Joined: May 2005

Posts: 15,960

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From: West Norriton PA

St. Jude Donor '08

Anyone got a how to for pinning the crank on an after-market keyed balancer and stock crank ?

Also where do you buy some extra pins ??

Thanks

Jul 29, 2008 | 09:19 PM

#23

bcarp

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From: North Texas TX

Quote:

Originally Posted by ajg1915

Anyone got a how to for pinning the crank on an after-market keyed balancer and stock crank ?

Also where do you buy some extra pins ??

Thanks

If not then maybe I am about to do one

Jul 29, 2008 | 10:19 PM

#24

MikeV

Drifting

Joined: Jul 2001

Posts: 1,312

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From: Lake Havasu City AZ

Quote:

Originally Posted by ajg1915

Anyone got a how to for pinning the crank on an after-market keyed balancer and stock crank ?

Also where do you buy some extra pins ??

Thanks

Pins are usually sized by a number. Look at mcmaster carr for sizing.

Mike V

Jul 29, 2008 | 10:46 PM

#25

BLOWNBLUEZ06

Tech Contributor

Joined: Apr 2007

Posts: 10,924

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From: Forney Texas

Quote:

Originally Posted by lucky131969

So you put a round peg in a square hole...purposely....

It wasn't a square hole when I was done with it! I used a 1/4" carbide bit on my angled die grinder, set the rpm low and radiused the square to round. The keyways are broached 3/16" and the pins are 1/4" I was careful to watch the sides round out then the bit touched the bottom of the keyway. I knew I only had to go into the base of the groove 1/16" and by the time I did, the key groove was round. For the OP, if you're unsure about doing this, just pin it on the other side 180° out and don't listen to the noise about balance. You're not talking about some significant weight hanging off a 12" radius spinning at 10krpm, you're talking about removing a few grams of metal and replacing it with a few grams of metal like someone else mentioned before.

Jul 29, 2008 | 10:49 PM

#26

BLOWNBLUEZ06

Tech Contributor

Joined: Apr 2007

Posts: 10,924

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From: Forney Texas

Quote:

Originally Posted by bcarp

A & A is in my future so I am doing it while it is apart

You won't regret it! Andy's a great guy with a fantastic product! Read my signature and you'll see that I'm finishing building a reasonably high hp car with his Ysi kit.