What is the standard for measuring brake disc runout?

[ReedLee]

Brake disc runout is measured with a standard of flatness deviation exceeding 0.05 millimeters. Below is relevant information about automotive braking systems: 1. Introduction to Braking: Braking, also known as deceleration, refers to the action of stopping or reducing the speed of moving locomotives, vehicles, other transportation tools, or machinery. The general principle of braking involves fixing a wheel or disc on the high-speed shaft of the machine and installing corresponding brake shoes, bands, or discs on the machine base to generate braking torque under external force. The braking device is a mechanical deceleration system, also known as a retarder. 2. Classification of Braking Systems: Drum brakes (advantages and disadvantages), disc brakes, etc.