Brake Rotor Holes?

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Jun 18, 2020 | 01:14 AM

nwav8tor

Thread Starter

Old Fart Pilot

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From: Spokane, WA

Brake Rotor Holes?

Drilled out the rivets holding my front rotors to the hubs today. To my knowledge, these were my '71s original rotors. Actually was easier than I thought it'd be. Anyway, after I was done, I noticed this on only ONE rotor:

RF rotor had these two holes in it, but the LF was solid all the way around.

Has anyone else seen this before and what the heck is it for (some sort of factory balancing?)?

Thanks,
paul

Jun 18, 2020 | 05:12 AM

4-vettes

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Interesting, balancing would have much greater effect at outer rim than way in there.

Jun 18, 2020 | 11:15 AM

Mrvettenick

Drifting

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Have not seen that before, but back then, who knows. I wouldn't lose any sleep over this. Are you cutting them?

Jun 18, 2020 | 11:50 AM

MelWff

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I wouldn't use that rotor.

Jun 18, 2020 | 12:13 PM

barkingrats

1967 Pedal Car Champion

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From: US-PNW

Quote:

Originally Posted by nwav8tor

RF rotor had these two holes in it, but the LF was solid all the way around.
Has anyone else seen this before and what the heck is it for (some sort of factory balancing?)?

I wonder if someone tried using it on the rear and the holes were drilled for access to the star-wheel parking brake adjuster...

Jun 18, 2020 | 07:23 PM

62corvette

Le Mans Master

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From: Waterford WI

Quote:

Originally Posted by 67:72

I wonder if someone tried using it on the rear and the holes were drilled for access to the star-wheel parking brake adjuster...

Not if he just today drilled the rivets that held them to the front hubs.

Jun 18, 2020 | 07:49 PM

7T1vette

Team Owner

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From: Crossville TN

Balance holes. Where else on the part could you drill metal out anywhere around the part? That drum is the only spot for removing that much metal.

The part has worked fine for 40 years. Why would you scrap it out now????