How much of a lip before you change the front discs?
- Thread starter Mark300zx
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shearzy
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About 4mm id of said mate. I always do 2 sets of pads to a set of disks.
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Definition
The Minimum Thickness of a Brake Disc is determined by a Motor Vehicle Manufacturer during the design of each particular vehicle and it defines the thickness at which a Brake disc must be replaced because it can no longer deliver the braking performance required of it.
1. First check the Brake Discs have not reached the minimum specified thickness, this measurement should be taken from the centre of the friction area on one side to the same position on the opposite side, it is important not to measure from one unworn lip to the other.
Only thing I couldn't find is the actual min thickness for each model as they will vary
PS a lot of discs can have a skim to extend there life
PPS If you read this it should be stamped on the discs
http://www.justpartsbiz.co.uk/acatalog/What_is_Brake_Disc_Minimum_Thickness_.html
then you will need the tools to measure them
The Minimum Thickness of a Brake Disc is determined by a Motor Vehicle Manufacturer during the design of each particular vehicle and it defines the thickness at which a Brake disc must be replaced because it can no longer deliver the braking performance required of it.
1. First check the Brake Discs have not reached the minimum specified thickness, this measurement should be taken from the centre of the friction area on one side to the same position on the opposite side, it is important not to measure from one unworn lip to the other.
Only thing I couldn't find is the actual min thickness for each model as they will vary
PS a lot of discs can have a skim to extend there life
PPS If you read this it should be stamped on the discs
http://www.justpartsbiz.co.uk/acatalog/What_is_Brake_Disc_Minimum_Thickness_.html
then you will need the tools to measure them
Last edited:
Haven't noticed them on the edge of the hub before is this on patent parts as well as oem?
Buger don't have a micrometer
Buger don't have a micrometer
it depends on how you drive, i know its not a LCR but on my cupra 312mm brakes i need new front pads after only 10-12.000miles, and the disc ar also close to min at this point so i change them also, so if you drive hard you need to change offen, if you drive "normal" you can do longer on the brakes, it all depends on how you drive if you can do 1 or 2 sets of pads on the same disc, if you know what i mean.
If the disk is in good condition/thickness apart from the lip then file the lip off, just don't score the main contact area otherwise will need to bed in again until any scoring get smoothed out
I will never ever let this man work on my car
you cannot file the lip off the disc would be uneven and out of balance if there is any life left in them they would have to be machine on a centre lathe in a machine shop you could remove anu old scoring at the same time providing the minimum thickness is not reached
Depends how good you are with your tools, afterall he said the lip is thin, no need to put on my lathe if I can achieve the same effect with careful use of hand tools. People have different skills and tools available to them, it was simply a suggestion that is achievable. For a disk to be in this condition the circumference of disk is also likely to be rusty and flaky with bits missing so how would that effect the balance of the disk currently in use ?
It is about the thickness of the disc, it has the minimum wear stamped on the disc, go below that and the disc overheats and then at the worst moment you lose braking, the lip has nothing to do with it!
For those of you that arnt mechanically minded and pay garages do your work
If you have a decent MOT tester that advises that they are worn. Get them done sometime before the next mot.
If you drive your car hard a lot of the time, get em done sooner rather than later.
If you have a decent MOT tester that advises that they are worn. Get them done sometime before the next mot.
If you drive your car hard a lot of the time, get em done sooner rather than later.
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