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How to Determine Brake Pad Thickness?

1 Answers

VanJasmine

07/29/25 9:13pm

A new brake pad typically has a thickness of around 15mm, which gradually wears down with use due to friction. Professional technicians recommend that when visual inspection shows the brake pad thickness has reduced to approximately one-third of its original thickness (about 5mm), vehicle owners should increase self-inspection frequency and prepare for replacement. Additional information is as follows: 1. Classification: Brake pads are mainly divided into the following categories: metallic brake pads and carbon-ceramic brake pads. Metallic brake pads are further classified into low-metallic and semi-metallic brake pads, with ceramic brake pads falling under the low-metallic category. Carbon-ceramic brake pads are used in conjunction with carbon-ceramic brake discs. 2. Braking Principle: The working principle of braking primarily relies on friction, utilizing the friction between the brake pads and brake discs (or drums), as well as between the tires and the ground, to convert the kinetic energy of the moving vehicle into thermal energy through friction, thereby stopping the vehicle. An efficient and effective braking system must provide stable, sufficient, and controllable braking force, along with good hydraulic transmission and heat dissipation capabilities, to ensure that the force applied by the driver on the brake pedal is effectively transmitted to the master cylinder and slave cylinders, while avoiding hydraulic failure and brake fade caused by excessive heat.

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