Why brake pad manufacturers use chamfers

A brake pad chamfer is cut or ground into the brake pad after it’s formed and cured. The chamfer’s main goal is to reduce vibration noise from the leading or trailing edge of the brake pad when it first touches the rotor. In addition, the taper provides a smaller contact area in the center of the pad where maximum braking pressure is applied.

The car makers usually determine the type of chamfer based on the rotor metalurgy, size and design, along with the weight of the vehicle, power assist installed for that vehicle. Chamfers also reduce backing plate flex.

Parallel Chamfer

Appearance: There are two parallel, 25 or 15 degree, chamfers from the top of the brake pad to the back plate.

Purpose: Designed to remove high vibration areas around the edges of the brake pad from contacting the rotor.

J-scoop Chamfer

Appearance: J-scoop shape design on the ends of the disc pad are parallel to one another.

Purpose: The J-scoop design is a cutout in the disc pad used to preserve the chamfer size throughout the pad wear.

Compound Chamfer

Appearance: Angled chamfers are designed with two different angles on the edges of the disc pad.

Purpose: Compound chamfers are commonly used on square shaped pads to allow maximum surface area for rotor contact.

Radial Chamfer

Appearance: The radial chamfers are designed with an angle in reference to the curvature shape of brake pad.

Purpose: Radial chamfers are commonly designed for longer length brake pads that follow the curvature of the rotor radius.

Radial J-Scoop Chamfer

Appearance: The J-scoop shape design with an angle in reference to the curvature shape of brake pad.

Purpose: The J-scoop design is a cutout in the disc pad used to preserve the chamfer size throughout the pad wear.

V Chamfer

Appearance: The patented V-chamfer is located in the center of the pad and features a V-shaped cut in the friction pad.

Purpose: The V-chamfer reduces high vibration from the center of the disc brake pad. V-chamfer is typically used in combination with parallel or radial chamfers.

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