Disc Brake Pads

Company Profile

Shandong Huaruifeng Machinery Co., Ltd. , founded in 2011 ,affiliated to Qingdao Huarui Group.It covers an area of 200,000 square meters with the initial investment of 160 million yuan.The company has more than 600 staff, 65 senior engineer, and the people who have college degree or above accounting for about 35% of the total number.The company is committed to the development and production of brake pads for passenger cars and commercial vehicles, and It has 5 production lines with an annual capacity of 6 million sets and more than 1200 kinds of product model. Currently, the product covers over 100 new energy vehicle models.

Why Choose Us

Professional Team

The company has strong technical force with more than 20 years of experience in the automotive industry expert team, independent design and development capability of formula, also keeping pace with the main engine factory.

Rich Experience

The company has an independent research and development center. The R & D center has a complete laboratory and related experimental equipment, so it is able to make detailed and accurate independent testing of the product performance and test parameters.

Advanced Equipment

The company has strong capacity of production of brake pad: 5 Production lines with an annual capacity of 6 million sets and more than 1200 kinds of product model.

Factory

Shandong Huaruifeng Machinery Co., Ltd. , founded in 2011 ,affiliated to Qingdao Huarui Group.It covers an area of 200,000 square meters with the initial investment of 160 million yuan.

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What is Disc Brake Pads？

A disc brake is a type of brake that uses the calipers to squeeze pairs of pads against a disc or a “rotor” to create friction. This action slows the rotation of a shaft, such as a vehicle axle, either to reduce its rotational speed or to hold it stationary. The energy of motion is converted into waste heat which must be dispersed.
Another advantage of disc brakes is their resistance to water fade, which occurs when the water on the brakes significantly reduces braking force. When the vehicle is in motion, the rotor spins at high speeds and this rotational motion discharges the water from the rotors themselves, resulting in stable braking force.

Benefits of Disc Brake Pads

Disc Brakes Provide Increased Stopping Power
Most importantly, disc brakes give you better braking control versus rim brakes. They allow you to stop more quickly and accurately, and at the speed you want in a variety of conditions.

Disc Brakes Stay Cleaner
With rim brakes, the braking surface is on the outside of the wheel and close to the road. This makes them vulnerable to collecting dirt.

Disc Brakes Allow For Wider Tire Options
A rim brake must go around the tire to reach the rims. This limits the maximum tire width. Disc brakes simply don’t have this problem because the braking is happening at the wheel hub. As a result, it is the frame that limits the maximum tire width.

Type of Disc Brake Pads

Sintered Pads

Sintered pads are made from hardened metallic ingredients and provide a long lifespan and good performance in the wet. They do take a bit longer to bed-in however, and they can sometimes be a bit noisy, but they cope with high temperatures well and are a good choice if doing some long descents, such as riding in the mountains.

Organic Pads

Organic (or resin or non-metallic pads) pads are made from organic materials and bound together using resin. The material is soft so the bed-in period is much shorter, and that means they have more initial bite and they’re quieter. They don’t last as long as sintered pads, and they’re not great in wet conditions, and can glaze at higher temperatures.

Semi-metallic Pads

The third option is semi-metallic. These combine metal and organic materials using resins to hold everything together with a steel or aluminium backing plate. They strive to provide performance that is somewhere between sintered and organic, but it depends on how much metal the manufacturer adds to the compound.

How do Disc Brake Pads Work?

Mountain bike disc brakes have been commonplace for a long time now but, in recent years, discs have also become the de facto standard on road bikes and gravel bikes.

As a result, discs are by far the most common type of bike brake on the latest performance-focused machines. But how do they work?

A disc brake pad is made up of a block of braking material bonded to a metal backing plate. The metal plate adds structural rigidity to the braking surface and holds it in position within the brake caliper.

When you apply a bike's brakes, pistons in the caliper push the pads against the spinning rotor, which is attached to the hub of the wheel.

The friction between the pad and the rotor generates heat and also slowly wears down the layer of braking material in the pad.

The metal plate helps remove heat from the brake and some will have fins or other features to help dissipate heat faster.

With prolonged hard braking, it’s possible for the pads to transfer enough heat into the caliper to boil the hydraulic fluid in the pistons, resulting in brake fade and causing the brakes to become less effective.

What is the Composition of Disc Brake Pads?

The composition of disc brake pads can vary depending on the application and manufacturer. Most disc brake pads generally consist of the following materials.

Friction Material

Disc brake pads contain a friction material that creates friction against the rotating disc. The friction material is commonly made from semi-metallic, organic, and ceramic components.

Backing Plate

The friction material is attached to a metal backing plate, typically made of steel. The backing plate provides support and rigidity to the brake pad, ensuring it remains secure within the brake caliper.

Adhesive

An adhesive or bonding agent firmly attaches the friction material to the backing plate. The adhesive ensures the friction material remains securely attached to the backing plate during braking operations.

Shims and Insulators

Some brake pads contain insulating layers made of rubber or other materials. These components help reduce noise and vibrations by suppressing brake squealing or rattling.

How to Replace Disc Brake Pads

Brake pads are a normal wear item on your vehicle. That means they are designed to wear down and be replaced. If you have disc brakes on your vehicle, this is a very manageable task and only requires a few tools.

Step 1: Removing the Wheel
Before jacking up the vehicle, you can use your tire iron or breaker bar to break loose the lug nuts on the wheel. This is much easier and safer while the car is firmly on the ground because it might require a decent amount of force to loosen them. If you have difficulty, try to position yourself to use your own body weight to help loosen the lug nuts.
Using your floor jack or scissor jack, elevate the vehicle using the jack points defined in your vehicle manual. Once the wheel is clear of the ground, place your jack stand in position to support the vehicle.

Step 2: Remove Old Brake Pads and Open Piston
We need to open the caliper to access the brake pads. There are two bolts that hold the caliper in place. You only need to remove one of them to be able to rotate the caliper away from the rotor. The brake line is usually short enough that you will typically want to remove the lower bolt and rotate the caliper .
Remove the bolt and the caliper should rotate up. You may need to use a second wrench on the caliper bolt bushing to keep it from spinning. If it rotates with the bolt, then you are not loosening the bolt yet. Some brake pads have small rivets on the back that might catch on the edge of the piston. If this happens and you can not rotate the caliper, you may need to use a wrench, screw driver, c-clamp, etc.

Step 3: Installing New Brake Pads
Now we are ready to put the new pads in place. There is typically a pair of notches, top and bottom, that small tabs on each end of the pads will seat into. As shown in the photos, seat one tab in the bottom notch, the rotate the pad into place and press into the upper tab into it's notch. Repeat on the inside brake pad. Sometimes the inside and outside pads are different and might have different shapes or metal tabs on them. Just make sure you are installing the pads in the same way you saw them before you started. On this specific vehicle, the inside and outside pads were identical.

Step 4: Close Up the Caliper
With the new pads in place, you are ready to close the caliper. Rotate it back down into position. You might need to press in caliper bolt bushing and/or jostle the caliper in or out to fit over the new thick brake pads. Once you have the caliper lined up, reinsert the bolt and tighten it back in place. You might need to use a second wrench again to hold the bushing in place while tightening the bolt.

Step 5: Reattach the Wheel
Place the wheel back on the hub by lining up the hub bolts with the wheel openings. You may need to re-elevate the vehicle with the jack if you no longer have proper clearance to get the wheel on. Twist on the lug nuts by hand to get the wheel snug against the hub. You can use your tire iron or breaker bar to tighten them down a bit here if you like. Tighten the bolts by switching back and forth to opposing lug nuts (pattern indicated in photo). This helps to make sure the wheel is seated flat against the hub. Otherwise, it could wobble and damage your vehicle while driving.

Step 6: Test Brakes
The job is almost done, but there is one last step. You need to test and make sure the brake system is functioning as expected. Enter your vehicle and crank the engine, but leave the parking brake set and do not put the vehicle in gear yet. Press the brake pedal and it should go all the way to the floor with very little resistance. This is normal and happens because we forced the hydraulic fluid back to the master cylinder when we compressed the piston to a more open position. You will need to pump your brake pedal six to ten times to rebuild pressure on your brakes.

How do Disc Brakes Compare to Rim Brakes?

Power Independent Of Tire Size: Brake design (and power) are not constrained by tire size. You can use the same brake for any tire, and you get as much brake power with wide tires as you do with narrow ones.

Wet-weather Performance: Because the rotor is small, the caliper must squeeze the rotor much harder than it does on a rim brake. This means that water will be scraped off the rotor quickly when riding in the rain. The best rim brakes also have enough power to offer decent wet-weather performance, but with disc brakes, even relatively inexpensive models work fine in the rain.
Separating tire and brake eliminates the risk of cutting into the tire with maladjusted disc brake pads. There is no risk of overheating the tire during long mountain descents. It also keeps rim and tire cleaner.

Components of Disc Brake Pads

Rotor (Brake Disc): The rotor is a flat, circular metal disc attached to the vehicle's wheel hub. It's a critical component that rotates with the wheel.

Caliper: The caliper is a hinged, clamp-like structure that houses the brake pads. It's mounted on a bracket and straddles the rotor.

Brake Pads: Brake pads are flat, rectangular blocks with friction material (usually made of composite materials like ceramics or metals) on one side. They are held within the caliper and make contact with the rotor.

Piston: Inside the caliper, there's a piston or pistons. When hydraulic pressure is applied, the piston(s) push the brake pads against the rotor.

Hydraulic System: This includes brake lines, master cylinder, and brake fluid. When you press the brake pedal, hydraulic pressure is generated, transmitted through the brake lines, and used to actuate the brake caliper pistons.

How a Disc Brake Pads Works

Brake Application: When you press the brake pedal, you initiate the braking process. This action sends hydraulic pressure through the brake lines to the caliper.

Piston Action: The hydraulic pressure forces the caliper piston(s) to move outward. As they extend, they squeeze the brake pads against both sides of the spinning rotor.

Friction Generation: The friction material on the brake pads makes contact with the rotor. As the rotor rotates, it gets sandwiched between the stationary pads. The resulting friction creates resistance and slows down the rotation of the rotor.

Kinetic Energy Conversion: The kinetic energy of the moving vehicle is converted into thermal energy through friction. This process generates heat and slows down the vehicle.

Stopping Power: As the rotor slows down, the vehicle decelerates. When the desired speed or stop is achieved, you release the brake pedal, allowing the caliper piston(s) to retract. This action releases the pressure on the rotor, and the wheel can rotate freely again.

Cooling and Recovery: The heat generated during braking dissipates into the air, and the brake system cools down. The rotor, brake pads, and caliper return to their normal state, ready for the next braking event.

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FAQ

Q: Are disc brakes and brake pads the same?

A: Brake pads are the part of the whole system that usually need replacing first since they are made of a softer material than the discs, and therefore wear much quicker as they are essentially eroded away by the metal discs.

Q: Is my car brake pads or discs?

A: Brake discs – Circular metal discs that turn with your wheels. When the brake pads are pushed against the discs by the callipers, your car will begin to slow down. Brake pads – Pads on either side of the brake disc that push against the brake disc when you press the pedal to reduce the speed of the car.

Q: Should I replace discs and pads together?

A: It might not always seem necessary to replace brake pads when you're getting brake discs changed, but it tends to work out for the best. As a general rule, it's recommended that if your brake pads are half worn down, get them replaced at the same time as the discs.

Q: How long does it take to replace brake disc pads?

A: How Long Does It Take to Change Brake Pads and Discs? A full brake pad and disc replacement can take between 1 and 3 hours to complete, regardless of whether you need the front or rear brakes changed. Changing just the brake pads can take between 30 minutes and 1 hour.

Q: What happens if you replace brake pads without turning the rotors?

A: If new brake pads are put onto a vehicle with damaged rotors, the pad won't properly contact the rotor surface, reducing the vehicle's stopping ability. Deep grooves that have developed in a worn rotor will act as a hole-puncher or shredder and damage the pad material as it is pressed against the rotor.

Q: Can you change brake discs without changing pads?

A: You can, but it's rarely a good idea, your old pads will have worn to the profile of the old discs and if those discs need replacing that is likely to be far from flat, you will immediately start to wear new discs unevenly. They will take ages to bed in and achieve full performance.

Q: How to tell if rotors are bad?

A: Some common symptoms of bad rotors include vibration or pulsation in the steering wheel, high-pitched squealing noise when braking, shaking steering wheel, brake pedal pulsing, vehicle taking a long time to stop, loud bangs while braking, large edges on the outer part of the brake rotor, and scratch marks on the rotor.

Q: Should I replace all brakes at once?

A: Typically, you should have both your front brake pads replaced at the same time, and your rear pads replaced at the same time, to ensure proper braking power. Of course, to make it easier on yourself with one simple visit, rather than two to four visits, you may want to replace all four brake pads at the same time.

Q: Can I replace disc brake pads?

A: Brake pads are a normal wear item on your vehicle. That means they are designed to wear down and be replaced. If you have disc brakes on your vehicle, this is a very manageable task and only requires a few tools.

Q: How to tell if brake pads are bad?

A: You might need a flashlight to get a good look at the brake pad. If the pads look thin, less than 1/4", it might be time to get them replaced. On some brake pads, you might see a wear indicator slot down the center of the pad. If the slot is gone or just barely visible, it's time for new brake pads.

Q: How often should I replace brake rotors?

A: Your brake rotors are meant to need to be replaced! Although no one likes to take a trip to the brake shop, we're there to make sure you're safe on the road. Brake Rotors are meant to endure about 70,000 miles.

Q: Can I drive with a bad brake disc?

A: Remember, driving with bad brake discs is not only unsafe but also potentially illegal. Regular maintenance and timely replacements will help keep your braking system in optimal condition and ensure your vehicle stops reliably when you need it to.

Q: What happens if you don't change your brake discs?

A: Run out causes vibrations that you can feel in the steering wheel or the driver's seat when you step on the brakes. If you don't replace the rotors when needed, you risk brake failure and an accident.

Q: Can I just replace brake pads and not rotors?

A: Replacing rotors isn't always necessary when changing brake pads. Rotor replacement frequency is influenced by rotor quality and driving conditions. If a mechanic identifies rotors as warped or excessively worn, they'll advise replacing them with new brake pads.

Q: Can you put new pads on old discs?

A: If you mean put new pads on old discs, as fitted on 'disc brakes', it will be ok so long as the discs are in good condition. It would be a futile attempt as the brakes would not be that efficient and the worn out rotor would eat into the new pads and reduce their life drastically.

Q: What is the lifespan of disk brakes?

A: Generally, brake discs should last more than 50,000 miles on average, but a number of factors affect the lifespan. If you keep them well maintained and drive sensibly, you may be able to get up to 80,000 miles out of one set!

We're well-known as one of the leading disc brake pads manufacturers and suppliers in China. If you're going to wholesale discount disc brake pads for sale, welcome to get quotation from our factory. Good service and quality products are available.

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