Brake discs end of life?

[pedrobedro]

Brother in law ran his Nissan pick up front brakes so thin the calliper piston came out. Luckily he was just puling up on the drive when it went.

 

[Ubique]

Dacromet was what we used to use back in the day when I worked at one of the major OEM disc manufacturers. Think its banned now due to all the nasty stuff they keep finding in all these old industrial chemicals and processes.
On a side note, the minimum thickness tolerances make me chuckle. During manufacturing, some of the dimensional tolerances were down to 5-microns !
On a cost related side note, I think were were making them at a loss in the end, selling them back to the OEM assembly plants for $0.50 each ......Goes to show how much the main stealers were pocketing

The run-out tolerances are quite a bit different, depending on manufacturer they can be down to +/- 0.03mm, the highest I've seen is +/- 0.15mm
Cost to dealers isn't the same as cost to Brand, we make about £20 - 30 on a pair of brake discs, plus pads & fitting of course!

 

[bricol]

Especially as the 'new' driving technique seems to be brake for EVERY corner ,oncoming vehicle ,pedestrian ON pavement, message sign etc . it must drive the heavies mad!

Maybe more automatics? Little to no engine braking, so you have to touch the brake to slow.

 

[anto44]

Pretty much all VAG cars bar a few high performance exceptions the disc wear limit is 2mm overall so 1mm per face, anything more than that is considered dangerously worn.

 

[redlig]

Maybe more automatics? Little to no engine braking, so you have to touch the brake to slow.

Even if you don't have to ? It's the numpties that cannot judge the road and conditions without dabbing the brakes every 10 seconds .

 

[merryman]

Now this is what I call a worn disc. If I remember rightly, it didn't come in for brakes, but owner asked us to check them while it was in for repair.

 

[bricol]

Even if you don't have to ? It's the numpties that cannot judge the road and conditions without dabbing the brakes every 10 seconds .

My Challenger will exceed the urban speed limits on tickover in 6th . . .

There's also speed camera fear? Not just static ones, the vans that move sites - one got me in an unexpected place as I rolled through a change in limit, allowing friction to slow me down - a touch of brake and I would be 80 quid and a few hours richer.

I do have to keep reminding myself that maybe not everyone wants to trust their car/tyres/ability by barreling around corners, etc at unabated pace as I do - or perhaps, did. I might be growing up

But I too wish that everyone else would get off the road when I am on it

 

[Joe 90]

Interesting to see the differences in mainland testing rules compared to Northern Ireland. Its still a fail here for brake discs but only smoke test for over 3.5 ton.

 

[Woody.v8]

Now this is what I call a worn disc. If I remember rightly, it didn't come in for brakes, but owner asked us to check them while it was in for repair.
View attachment 309598

Now that is a fully floating disc

 

[premmington]

Thats not a "fully floating disc" this is...



Your best OE spec three year old low mileage Ford Transit Custom front disc - rotted thru ( two weeks out of warranty with 16.000miles on the clock).




Discs/pads - two wheel bearings - one caliper hanger - one new caliper required.

Odd thing was the - the rest of the van looked clean and like new - no corrosion on wheels or suspension that side - other front disc looked OK.