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Author Topic: Sorry to start new thread but can you tell me min. rear pad/disc min thickness?  (Read 1708 times)

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Webby the Bear

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Sorry to start new thread but can you tell me min. rear pad/disc min thickness?
« on: 27 July 2012, 17:38:44 »
need to measure these at the weekend and i dont trust the haynes.

ps, thought freecall had answered this on a previous thread but he was talking about his wheel alignment measurements  ;D
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Webby the Bear

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Re: Sorry to start new thread but can you tell me min. rear pad/disc min thickness?
« Reply #1 on: 27 July 2012, 17:41:03 »
sh*t, just noticed i've excreted over 4000 posts  :) :) :) :) :) i use the word excrete cos most of my posts can be likened to taking a......  ;D
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tigers_gonads

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Re: Sorry to start new thread but can you tell me min. rear pad/disc min thickness?
« Reply #2 on: 27 July 2012, 17:42:06 »
Imo, any pad with less then 5mm on it needs replacing
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Webby the Bear

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Re: Sorry to start new thread but can you tell me min. rear pad/disc min thickness?
« Reply #3 on: 27 July 2012, 17:42:58 »
Quote from: tigers_gonads on 27 July 2012, 17:42:06
Imo, any pad with less then 5mm on it needs replacing

ok, thanks TG. Two q's to that then...... does 5mm inc. the backing plate of the pad? and do you know what min disc thisckness should be at ze rear? :)
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Martian

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Re: Sorry to start new thread but can you tell me min. rear pad/disc min thickness?
« Reply #4 on: 27 July 2012, 17:50:39 »
Autodata shows the following:

Minimum disc thickness - 10mm
Disc thickness variation - 0.010mm
Disc runout - 0.10mm
Minimum pad thickness - 6mm

Pad thickness measurement includes lining & backing plate.
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tigers_gonads

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Re: Sorry to start new thread but can you tell me min. rear pad/disc min thickness?
« Reply #5 on: 27 July 2012, 17:51:58 »
The 5mm is just the friction surface  ;)

After that, they tend to heat up a fair bit under hard use so I always change them a bit early  :)

As for the discs, is they a lip on the edge yet ?

Again, if its just a small lip (1mm ish) I tend to attack it with a angle grinder before I fit new pads or they don't sit properly on the disc when you brake.
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albitz

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Re: Sorry to start new thread but can you tell me min. rear pad/disc min thickness?
« Reply #6 on: 27 July 2012, 17:54:41 »
The pads will let your ears know when theyve had enough. ;) ;D
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Webby the Bear

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Re: Sorry to start new thread but can you tell me min. rear pad/disc min thickness?
« Reply #7 on: 27 July 2012, 17:54:58 »
Thanks very much guys.

TG, am checking on Sunday  :y

Martian, sorry whats variation and runout?

Cheers.
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STMO123

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Re: Sorry to start new thread but can you tell me min. rear pad/disc min thickness?
« Reply #8 on: 27 July 2012, 18:00:27 »
Quote from: Webby the Bear on 27 July 2012, 17:54:58
Thanks very much guys.

TG, am checking on Sunday  :y

Martian, sorry whats variation and runout?

Cheers.


You'll kill some poor bastid soon ;D ;D
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Martian

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Re: Sorry to start new thread but can you tell me min. rear pad/disc min thickness?
« Reply #9 on: 27 July 2012, 19:44:07 »
Quote from: Webby the Bear on 27 July 2012, 17:54:58
Martian, sorry whats variation and runout?
Variation is the figure that dictates how much the disc thickness can be out at any given point. (eg, if you measured 11mm thick at the 12 o clock position, that thickness cannot increase or decrease by any more than 0.010mm at any other position).

Runout is how true the disc is when it is spun on it's centre axis.
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Webby the Bear

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Re: Sorry to start new thread but can you tell me min. rear pad/disc min thickness?
« Reply #10 on: 27 July 2012, 22:44:24 »
thats a perfect explanation. Thanks mate :-)
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