Brake Repair Parts

Rotors

picture of a brake rotor
There are Mechanics that will state that bad brake pads are the reason for squealing noise, but really the cause of the noise is the rotor. Some mechanics think that because of the rotor being a thick piece of metal, that it is not changing when brakes are applied creating excessive force and crazy heat. Rotors do change when brakes are applied, and the rotor will move and expand. It is not something a person can see, but the rotor pressing the pad at 2,000 pounds per square in, and at temperatures up to 1,400 degrees a rotor can react and make noise.
A used, worn rotor that is rusted may not be able to control the movement. Under sized rotors will be subject to high levels of flex and force caused by thinner outer discs, overall cheek and hat section geometric ratios as the rotor may not cool properly.
As the components heat up, the rotor may develop hot spots that cause different regions of friction that produce inconsistent levels of brake torque. This friction coupling is where most brake noise is generated.
This then will compromise and change the brake pad as it meets the rotor creating less ability to generate brake torque, which then has the rotor compromised, vibrating.
Integrity of a brake rotor is not only the surface but goes deeper into the property of the metal. A used or inefficient rotor does not have the same weight or content metallurgical content to aid in preventing movement.
A new rotor with it's finish can provide a smooth surface for the pads and a true surface.

Brake Pads

brake pad how quality is made
What can make one brake pad quieter than another one?
If the Material is better at staying the same at a wide range of temperature and conditions, the brake pad is most likely quiet. A “consistent” brake pad material will causes less vibration and variation when the brake pad meets the rotor by being consistent at environmental extreme when humid and varied temperature.
Also some brake pad materials will coat the rotor with a layer of transfer film on the rotor’s surface that can smooth out the rotor surface, thereby causing less excitment and noise when the brake pad and rotor meet. This transfer layer is not sensitive to heat caused when brake is applied in variation.
The backing plate can also cause noise. If a backing plate is flexing under the mechanical forces of the caliper, its friction footprint on the rotor changes as the driver modulates hydraulic pressure. Brake pad manufacturers can either add thickness to the backing plate or change the attachment methods so that the holes for rivets or integral molding voids are minimized. Some attachment methods eliminate the holes altogether.
Another factor can be the shape of the friction material on the brake pad. Factories make the brake pad to the overall system, which includes ele overall length, width and design elements like chamfers and slots. The dimensions and design elements can reduce excitation and change the vibrational frequency. Some brake pad manufacturers will make the shape of their pads to match older vehicles and the characteristic of the friction material recipe.

High Temperature Brake Grease

brake grease brake tech
Lubrication of certain parts on caliper and slide pins will help reduce noixe and make brake pads last longer. Using high temperature grease on a caliper finger at the point it touches the brake pad, the lubricant is a layer that separates the vibration of the brake pad from the caliper finger and the caliper. This is one item to solving wear and noise problems. it is also recommended to have silencer shims on the back of the brake pad. Also, lubricants are great on brake slides.
Using the right lubricants on brake system is important. Not coming off during driving is why special brake lubricants are better than other lubricants. Special, high temperature brake grease can hold up against the heat and also not cause problems with rubber seals or plastic bushings.
Brake Tech makes sure Petroleum-based lubricants are never be used for brake work as mineral oils can cause seals to swell up and not be used.
Brake Tech uses a moly-lube on all metal-to-metal surfaces and a quality silicone lube on all metal touching ubber parts. Some silicone lubricants can be used on slides because they are formulated to withstand high pressures and heat.

Caliper Hardware

Stacks Image 33
New Caliper hardware is recommended when brake pads are replaced. Brake hardware for disc brakes holds the brake pads in place in the caliper and aids it removing the brake pad from the rotor when braking is done. This will reduce noise and wear on your new brake pads. Heating and cooling cycles can weaken springs and anti-rattle clips causing various problems with the brake systems and even damage the pads and rotors. Some springs and anti-rattle clips can be difficult to install, but leaving them off is not a good option. Soft parts like dust shields, grommets, and bushings are just as important as the hard ones. To perform a $88 brake job, a technician cannot clean and lubricate the caliper guide pins. A technician only has enough time to pull one pin, rotate the caliper, push the piston back, replace the pads and then follow the reverse steps. Brake Tech offers parts and service on menu pricing, so you decide what you want. Brake Tech recommends new hardware clips and lubricating the slide pins
Many clips will lose tension over time, and when the spring tension is lost, so is the ability to isolate and dampen vibration. Corrosion is another enemy of the floating caliper. Corrosion on the slides and guide pins can destroy surfaces.