Say Goodbye to Brake Noise Comebacks

Say Goodbye to Brake Noise Comebacks

To understand where brake noise comes from, it's essential to grasp the mechanics of brake noise.

Brake noise is one of the most controversial topics in brake repair. Where the noise is coming from and determining the right way to fix something may be complicated. However, the root cause is simple – all that squeaking, chirping and groaning originates at the contact point between the pad and rotor. Let’s talk about why understanding brake noise is key to preventing brake-related comebacks in this Tire Review Continental Tire Garage Studio video.

To understand where brake noise comes from, it’s essential to grasp the mechanics of brake noise. It starts with something called force-coupled excitation. When the friction material makes contact with the rotor, it causes both components to vibrate. These vibrations can be influenced by variations in brake torque, which can lead to the creation of hot spots on the rotor, generating friction coupling and, you guessed it, brake noise.

But, how do we tackle this noise issue? The key lies in controlling vibrations at the pad and rotor interface. First, selecting a friction material that maintains consistent friction across various environmental conditions like temperature can significantly reduce noise.

Additionally, some friction materials leave behind a layer of material on the rotor’s surface, often referred to as a transfer film or “seasoning.” This layer can smooth out the rotor surface, further reducing excitation and noise.

The actual finish of the rotor is crucial to maintain and inspect. Rotor machining aims to provide a smooth surface finish for the pads. This finish is described in terms of micro-finish or “RA factor,” and is essential for transferring material for various types of friction materials.

What about brake pad noise, where does it come from? All brake pads must undergo a bed-in process with the rotor they’ll be used against to maximize brake performance. A bed-in process’ primary goal is to establish a proper mating surface and optimal frictional contact between the brake pads and the brake rotors, building up heat in both the rotors and the pad compound. The bed-in procedure is not about curing the pad but ensuring that there’s a smooth, even transfer film on the rotor. It’s essential to follow the manufacturer’s recommended procedures for bed-in processes.

Don’t forget to follow us on Instagram and Facebook and subscribe to our YouTube channel for more tire, service and shop operations videos.

You May Also Like

ADAS Inspection Should Include More than a Test Drive

You can’t confirm that radar, camera and other ADAS components are aimed accurately and operating properly during a test drive.

Continental-adas Inspection

Advanced driver assistance systems, or ADAS, take vehicle safety to the next level. Features like automatic emergency braking, lane-keeping assist and adaptive cruise control are becoming standard on new vehicles. However, these complex systems require proper calibrations after repairs to function correctly.

Let’s talk about whether relying solely on a test drive is enough to verify ADAS performance in this Tire Review Continental Tire Garage Studio video.

What to Consider When Investing in a New Automotive Lift

There is a variety of lifts on the market in all shapes and sizes, from two-post to four-post to scissor and mid-rise styles.

Tire Puncture Care 101 for Technicians

High-tech tires can still receive damage from road hazards, but you don’t see many drivers taking care of these repairs themselves.

How to Diagnose Anti-Lock Brake System Issues

ABS activation incidents ­involve the ABS modulator taking over braking or intervening to restore vehicle stability.

Tire Balancing Using Road Force Function

Traditional wheel balancing methods may not always provide the desired results, leading to vibrations and uneven tire wear.


Other Posts

Continental to Include Tread Wear Indicators on ContiPT18

Tread wear indicators indicate when the tread no longer meets the minimum depth.

ADD Group to Present Various Product Lines at AM Shanghai 2023

The company is highlighting new complete strut assemblies and air shocks for EV applications.

VIP Tires & Service Executive Chairman’s Five Steps to Keeping Customers for Life

John Quirk says customers do not simply support VIP due to getting great service; it’s because his people build relationships.

Maximizing Motorcycle Safety and Performance with TPMS

While TPMS has been mandated for passenger vehicles in the U.S. and other countries, motorcycles are not yet a part of this legislation.