Help of maximum wear measures

Hello good I have searched and searched
but I can't
know
what is the minimum measure of a brake disc to change it?
Mining brake pill to change it?
Minimum drum brake balatory?
And the last one that is the most important
, what is it and why is it called primary talla and secondary scales on the drum brake?

The measures are varied by the manufacturer so if they have any tell me and specify that manufacturer is ... please help quickly since I have a title exam and I have not had much time to prepare for family problems

MINIMUM MEASURE TO CHANGE A DISK There are no standard of any disc change is based on the rebound produced by wear and do not have brown spots of being like this disk outside that it has been overheated and skate, also that it is not deformed.
Minimum measure of the pills there are no standards per manufacturer, the eye is seen if there is ferod or there is no. (3 millimeters are already to change if we do not want to damage the disc).

Balrata? I do not know what it is, but the drum brake apart from the fact that as a general rule it is behind and almost does not suffer and changed drum shoes in a boredom kit for boredom 200,000 Kilometers and even being well and rare is to change the drum.

GIVE OK FOR THE ANSWER ... ABOUT THE DRUM BRAKE ... BALATA OR SHOE TALK IT THAT IT WAS THE SAME ... BUT A LAST QUESTION ... YOU KNOW BETWEEN THE PRIMARY OR SECONDARY ZAPATA ... OR WHICH YOU CAN KNOW ... FOR WHAT I HAVE READS BY THE GIRL ...

Having the shoe and the balat is the same, the first one is the one that brings the piola of the handbrake and the secondary is the one that is free, the thicknesses are determined by manufacturers, but the pills usually bring a wear warning that tends to give a margin of about 2mm, the thickness that the tablet will vary depending on if it is original alternative or the brand and many things so it is not Relevant, the thickness of the album will also depend if it is ventilated or not, but the discs bring a mark that indicates the rectified maximum, the drums do not bring this brand but it is considered a thickness of a minimum wall of 3mm the problem is that the factory tales bring a measure and the drum should not be rectified if this work is done.

Thank you very much for your answer ... This is clearer ... it is appreciated