Why does this happen then? Pads seperate from plate.

Why does this happen then? Pads seperate from plate.

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Prof Prolapse

Original Poster:

16,160 posts

189 months

Friday 22nd July 2016
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Mr2Mike said:
That seems very unlikely, every pad I have seen has been steel but often plated with a copper finish. Try a magnet on it.

The sintered material refers to the pad itself rather than the backing which are invariably stamped from sheet steel. A backing plate made using a sintering process would be too brittle and very expensive to make.
Ah fair enough, I was going off finish. I'll take your word for it.

Yeah I know a bit about "sintering", not much but I realise it's only appropriate for the pads. Makes me wonder if organic pads have this problem...

luckystrike

536 posts

180 months

Friday 22nd July 2016
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Had this happen on one of the front pads of my mk1 focus a few months back - pad material just fell out of the caliper in a little pile inside/beside the wheel as I reversed out my drive. Glad it happened there and not on the motorway! Pedal went straight to the floor, was a little bit of a shock. Would hate to go through the same on the front of the bike.

Prizam

2,335 posts

140 months

Wednesday 27th July 2016
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Mr2Mike said:
Prizam said:
Had his several times.

My theory is, as the pad comes to the end of its life. It has a lot less materiel to disperse the heat. This then some times cooks the glue on the back of the pad and it craps out what braking materiel it has left.
Apart from it's always the rear brakes which barely get hot compared to the fronts.
Smaller surface area.

Mr2Mike

20,143 posts

254 months

Wednesday 27th July 2016
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Prizam said:
Smaller surface area.
Sorry, what's your point? Back brakes do very little work on a bike. Unless your calliper is binding or you are on a mission to save your front brake pads then they simply don't dissipate as much energy as the fronts, which is why they only need to be a fraction of the size.

The only reason it happens is moisture ingress, and lack of heat to dry them out. It's the same reason that delamination is also relatively common on rear brake shoes on cars, particularly drum in disc handbrakes that never get hot at all.

Edited by Mr2Mike on Wednesday 27th July 20:04