Why Do Brake Pads Grind Against Brake Discs?
2 Answers
Reasons for brake pads grinding against brake discs: 1. There are foreign objects between the brake pads and brake discs; 2. Use of inferior quality brake pads; 3. Inconsistent size of brake pad friction blocks or misalignment during installation; 4. Poor installation of brake pad shims or lack of lubricant on the shims. The basic components in the braking system that require regular maintenance include brake pads, brake discs, and brake fluid. Brake pads are critical safety components in a car's braking system, and the effectiveness of braking largely depends on them. The friction generated between the brake pads and the wheel drum or disc converts the kinetic energy of the moving vehicle into heat energy during the friction process, thereby achieving the purpose of slowing down or stopping the vehicle.
As a veteran driver with decades of experience, I think it's perfectly normal for brake pads to wear down brake discs. The braking system relies on their friction to slow down and stop the vehicle. Every time you press the brake pedal, the pads and discs make contact to create resistance, and over time, wear naturally occurs. However, pay attention to small warning signs, such as squeaking noises or feeling brake vibrations, which might indicate gravel embedded in the disc surface or a caliper not retracting properly, leading to continuous friction and accelerated wear. I encountered this during a long-distance trip—the disc got scored with grooves, and leaving it unrepaired could even affect tire balance. I recommend driving gently in daily use and avoiding sudden braking in urban areas. Check the brake pad thickness every six months; replace them when they're down to about 1mm—don't wait until the disc is ruined and costs you a fortune. Safety comes first, and regular maintenance saves both peace of mind and money while extending your car's lifespan.
