Built a rotor balancer

[Turbo Cow]

I've been trying to track down a vibration since upgrading to cross drilled powerstop rotors and pads. I have my own tire balancer and have balanced my tires multiple times. Only thing left is the rotors. The factory ones are out about 1/2oz. I'll test the powerstop ones tomorrow after I remove them from my car.

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[G.T.]

Very cool!

How does that work exactly? I mean when you spin it, you will see where it shakes, then what?

I do know the concept and I've seen the holes/grooves/areas where mass was removed in rotating parts to balance them, but I never looked into how it's actually done.

 

[Turbo Cow]

Very cool!

How does that work exactly? I mean when you spin it, you will see where it shakes, then what?

I do know the concept and I've seen the holes/grooves/areas where mass was removed in rotating parts to balance them, but I never looked into how it's actually done.

Its a simple gravity balancer. Rotate it 90 degrees and see if one side is heavier. Repeat. Find the heavier side and remove material. But im doing this to show proof to powerstop that its their rotors that are out of balance. They'll have to replace them or refund my money.

 

[G.T.]

I see. So that's what its called and how its done, thanks for educating me!

What are your findings on that rotor?

 

[Turbo Cow]

I see. So that's what its called and how its done, thanks for educating me!

What are your findings on that rotor?

The one in the picture is the factory rotor. It doesn't seem to be out by that much maybe a quarter to 1/2 oz.

 

[G.T.]

I'd be interested to see what you find with the Powerstop rotors when you get around to checking them.

 

[Cobra Jet]

Its a simple gravity balancer. Rotate it 90 degrees and see if one side is heavier. Repeat. Find the heavier side and remove material. But im doing this to show proof to powerstop that its their rotors that are out of balance. They'll have to replace them or refund my money.

Is Powerstop refusing to honor their warranty which is why you’re trying to demo the “out of balance” of their rotor(s)?

Will you be posting a video of the test?

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