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Old 05-04-2021, 06:48 PM   #3
V8COOPMAN
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Location: East Shore of LAKE HOUSTON
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Default Re: Purpose of the spring around the OD of brake drum ?

Quote:
Originally Posted by Mart View Post
It's a sound deadener to stop the drum "ringing".

I think.

Or maybe to assist in heat dissipation.

In other words I don't know but am prepared to have a wild guess!

Mart.

Mart about has it! The spring is supposed to resist a harmonic of sorts that can develop under some conditions, and which can result in noise and squealing. They say that the spring tended to help resist the squealing. And any of you old enough to have watched drums being turned years ago will probably remember the tech wrapping and stretching that big strap around the drum before machining. I believe it's purpose was similar. DD
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