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Old 09-27-2012, 09:38 PM
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Can drums/rotors be balanced?

i heard from a former midas worker that rotors/drums can't be balanced, but i'm thinking they can.

What is the low-down on this?

P.S. This ties in with the thread that i started entitled "overdrive vs. direct drive+high gear."

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Old 09-27-2012, 10:02 PM
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Anything that turns can be balanced. That being said a brake shop probably doesn't have the equipment to do so. Ask a good automotive machine shop if they have the properequipment. Drive shaft makers also.
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Old 09-27-2012, 10:23 PM
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Drums & Rotors come balanced from the Factory or Remann shop. Unless they are severely worn they're probably fine.
You can see the round Lead weights on these Al. Drums.
http://www.bowtiepower.com/images/drumoutside.jpg
Cast Iron Drums with rectangle weights.
http://www.britishv8.org/articles/Im...ession6-DD.jpg

Last edited by SSedan64; 09-27-2012 at 10:37 PM.
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Old 09-28-2012, 08:28 AM
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Quote:
Originally Posted by SSedan64 View Post
Drums & Rotors come balanced from the Factory or Remann shop. Unless they are severely worn they're probably fine.
You can see the round Lead weights on these Al. Drums.
http://www.bowtiepower.com/images/drumoutside.jpg
Cast Iron Drums with rectangle weights.
http://www.britishv8.org/articles/Im...ession6-DD.jpg
This is absolutly true.
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Old 09-28-2012, 08:38 AM
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rotor balance

I have an old Bear spinner wheel balancing Machine, It has a couple sets of mounting plates with multiple holes for different wheel patterns. When you can't match up the bolt holes there are a couple cones with a one inch bore used to mount a brake rotor or hub, Static balance is easy. To spinn balance a rotor I would have to change out the steel driver wheel that contacts the tire . I have seen quite a few rotors with large Roll pins pressed into the cooling fin holes. Just like drive shafts I don't like using one that has a lot of balance weights.
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Old 09-28-2012, 09:17 AM
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This month's issue of Auto Restorer magazine had an article about balancing rotors. The author used a cheap Harbor Freight motorcycle wheel balancer. It's easy to put balance weights in between the fins on a vented rotor. Solid rotors and drums are tougher - drums require welding, solid rotors require drilling holes.
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