Warped hub flange - your thoughts?

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Jun 5, 2020 | 12:04 PM

#21

leadfoot4

Team Owner

Joined: May 2001

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From: Western NY

Quote:

Originally Posted by Rescue Rogers

Why don’t you get the rotor checked?

I think he did. He said in post #3 that he "rotated" the rotor around all 5 possible locations on the hub, and the run-out remained the same. Of course he didn't say if the measured run-out stayed in the same place, with respect to the rotor.

Jun 5, 2020 | 12:10 PM

#22

Rescue Rogers

Is my vette stock?? HAHA

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From: Im not allowed to tell you

2020 C3 of the Year Finalist - Modified

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That’s what I’m confused by... the hub is .007 runout which is less than half of the thickness of a paper match. And the rotor is .02.....why is everyone still talking about the hub and milling it.??

Jun 5, 2020 | 12:35 PM

#23

leadfoot4

Team Owner

Joined: May 2001

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From: Western NY

Quote:

Originally Posted by Rescue Rogers

Yeah, good point. As I said, the OP should have been more specific about how he measured the r/o of the rotor. Who knows, maybe there's a burr or two on the inside face of the rotor, where it seats on the hub........

Jun 5, 2020 | 02:09 PM

#24

Mark G

Thread Starter

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Joined: Jul 2005

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From: WI

Quote:

There aren't (any burrs). No rust on either face. The rotor looks new, almost like out-of-the-box new. All this work was done and I guess the previous owner then had some medical issues, like a stroke or something. The guy I bought it from was selling for the owner and had no idea of the history other than what I mentioned above (I think the owner then passed away). .02 for a rotor is a LOT of run-out. I generally like to get rotors to .001. I marked the rotor and hub high/low, The run-out when rotating stays consistent with the hub warpage. Yes I could probably take the rotor in, maybe I will. I don't think at this point I need to with the hub that far off. I Just wanted a gut-check on your thoughts on the hub-face.

I'm familiar with shimming, done it plenty of times. Just curious do new hubs come faced "true" to rotation?

Thanks
.

Last edited by Mark G; Jun 5, 2020 at 02:12 PM.

Jun 5, 2020 | 02:56 PM

#25

barkingrats

1967 Pedal Car Champion

Joined: Mar 2020

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From: US-PNW

I have a foggy thought and question forming... Would measuring the parallelism of the inside/outside surfaces of the rotor's mounting faces be important?
How about mic'ing the thickness of the rotor at various spots around it to check parallelism of the two surfaces?