Disque Break Pads: Ware them down to the boan?
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ignominious poltroon
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(I have a backup stash of rotors, too. I wrongly wrote J03A, which are currently available at a semi-reasonable price.)
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ignominious poltroon
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Here is the problem. I am taking these off while they still technically have a bit of life left in them, and it seems kind of wasteful in a time of scarcity.
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https://si.shimano.com/pdfs/dm/DM-R8050-01-ENG.pdf
What do you do to get that many worn out pads? That's like 24 years of cycling for me! <grin>
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ignominious poltroon
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So how are you measuring those to determine they are worn? It's only the pad thickness that you go by. With calipers, zero them out on the base the pads are mounted to, then measure the entire thing which will give you the pad thickness relative to where you zeroed the calipers.
https://si.shimano.com/pdfs/dm/DM-R8050-01-ENG.pdf
What do you do to get that many worn out pads? That's like 24 years of cycling for me! <grin>
https://si.shimano.com/pdfs/dm/DM-R8050-01-ENG.pdf
What do you do to get that many worn out pads? That's like 24 years of cycling for me! <grin>
I am measuring the pad + backing and subtracting from that sum the backing only, using digital calipers (the functional equivalent of re-zeroing, but mine don't do that). I've been changing them at about 0.9mm net thickness, which is what the instructions I read said to do. They must have revised the instructions, which would make sense, because the bone-shaped wear pattern is visible at 0.5mm.
The good thing about that collection/hoard is I can go back and put them in and wear down about 0.3 or 0.4 mm more in many instances. (I would put them in the back so as not to die.)
That pretty much answers my question, if they have revised the advisory to change when worn to a net thickness of 0.5mm.
Last edited by Polaris OBark; 03-17-22 at 06:28 PM.
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Polaris OBark
Just notice that I was only showing that as a reference for how to measure. And that my example is from the DM for the Ultegra R8050 series which covers my BR-R8070 brakes. So find the manual for your brakes to get the minimum recommended pad thickness.
https://si.shimano.com/
If you go through that many pads, then maybe you'd be better off wearing them down to nothing and just accepting that you might have to replace the entire brake every so often. Or find someone that can give you a really good deal if you buy brake pads by the gross. <grin>
Just notice that I was only showing that as a reference for how to measure. And that my example is from the DM for the Ultegra R8050 series which covers my BR-R8070 brakes. So find the manual for your brakes to get the minimum recommended pad thickness.
https://si.shimano.com/
If you go through that many pads, then maybe you'd be better off wearing them down to nothing and just accepting that you might have to replace the entire brake every so often. Or find someone that can give you a really good deal if you buy brake pads by the gross. <grin>