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poacher22

M.o.t Testers

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Im at college cg nvq motor Vehicle and have been asked to find out what the laws are on Minimum thickness ov brake disks and how much run out is aloud on a disk so if any one can tell me i would be very Grateful

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minimum thickness & run out tolerance is subject to each manufacturers specification.

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Yes but my tutor said there was a Minimum thickness for all disks (eg. He said that some Manufactures Specifications on pads are as low as 1.5mm but as a Mechanic it is law to Advise a customer to change them and it was Illegal for them to be less then 3mm)

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The need to be below 1.5mm to fail an mot, which is a legal document I would advise pads @ 3mm but it's not legal requirement.

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minimum thickness varies from disc to disc , its normally stamped on the disc... run out is 6 thousands of an inch ...

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minimum thickness varies from disc to disc , its normally stamped on the disc... run out is 6 thousands of an inch ...

 

Thank you Much appreciated 👍

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most of the time the wear limit on a vented disc works out at 2mm below new, and if your tutor is giving you that sort of incorrect bullshit over whats law then its time he retired or got a job in a kwik-fit type garage

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