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What are the signs of insufficient brake disk thickness?

2024-10

Longer braking distance: Insufficient thickness of the brake disk will lead to a reduction in the friction between it and the brake pads, and the braking torque will be reduced.

When the thickness of the brake disk is insufficient, the vehicle will experience a drop in performance and abnormal rattling during braking, as shown below:

Decrease in braking performance

Longer braking distance: Insufficient thickness of the brake disk will lead to a reduction in the friction between it and the brake pads, and the braking torque will be reduced. Under the same braking pressure, the vehicle needs longer time and distance to stop, increasing the risk of traffic accidents.

Braking effect becomes softer: drivers will feel that the brake pedal stroke becomes longer when stepping on the brakes, and the braking force is not as sensitive as before, and they need to step on the brake pedal more deeply in order to achieve the same braking effect. This is because the thickness of the brake disk becomes thinner, its structural strength decreases, and it is more likely to be deformed during braking, thus affecting the normal work of the brake system.

Abnormal Rattle

Metal friction sound: When the thickness of the brake disc is worn to a certain degree, the gap between the brake pad and the brake disc will change, and an abnormal metal friction sound may be produced during braking. This sound is usually sharp, and will continue to appear when braking, is the brake disc thickness is not enough of a clear signal.

Vibration noise: Due to uneven thickness or overall thinning of the brake disc, an imbalance will occur during high-speed rotation, which in turn causes vibration in the braking system. This vibration will be transmitted to the car through the chassis, and the driver can feel the obvious shaking, and may also be accompanied by a buzzing noise.

Brake disc surface abnormalities

Cracks: Brake discs with insufficient thickness are more prone to stress concentration when subjected to large braking forces, resulting in cracks on the surface. If these cracks are not dealt with in time, they will gradually expand and may eventually lead to the rupture of the brake disk, causing serious safety accidents.

Uneven wear: Insufficient thickness of the brake disc may lead to uneven wear in the circumferential direction, resulting in severe localized wear. This will cause the surface of the disc to form an uneven shape, further affecting the braking performance, and will produce shaking and noise when braking.