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- As you can imagine, rotors are a vital part of your vehicle’s braking system. Every bit as important as the brake pads. Brake rotors need replacing for several reasons, including: They are too thin. Over time, the rotors do wear down. When they get to be a certain thinness, they will need replacing.
mymechanic.net/2020/03/27/what-are-brake-rotors-and-when-should-they-be-replaced/Brake Rotors: How Do You Know When They are Bad - My Mechanic
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Do brake rotors need to be busted?
Do brake rotors really matter?
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Do brake pads wear out faster than a rotor?
Do you need new brake rotors?
Are rotors and disc brakes the same thing?
- Warped brake rotors. This is the number-one braking myth. Perhaps it has become so ubiquitous because, at first, it appears to make sense. If you feel steering wheel vibrations or pedal pulsations when braking, then the disc’s surface must be uneven because it is “warped” from excessive temperatures, right?
- Bigger brakes will help you stop quicker. Brake rotors with a larger radius will increase the lever arm of the braking force over the center of the hub and, therefore, the braking torque applied to the wheel.
- Drilled or slotted brake rotors are better. We’ve already seen that fitting bigger rotors does not necessarily make sense for a normal street-driven vehicle.
- Disc brakes stop faster than drum brakes. Fewer and fewer cars nowadays use drum brakes and those that do only use them on the rear wheels, where the braking forces are lower.
- A ROTOR’S MINIMUM THICKNESS SPECIFICATIONS ARE BASED ON HEAT. False: The discard or minimum thickness specification is based on the travel of the caliper piston if the pads are worn to the backing plates.
- SOFT/HARD PADS=SOFT/HARD PEDALS. Mostly False: The engineering term for measuring the hardness of brake pads is compressibility. Engineers typically measure compressibility as a manufacturing quality control measurement and not as a performance measurement.
- WET BRAKE ROTORS INCREASE STOPPING DISTANCES. True and False: Remember when you were first learning to drive and some adult told you to tap the brake pedal after you drove through a puddle?
- REPLACEMENT BRAKE PADS ARE REGULATED FOR PERFORMANCE. False: There are no government-mandated or industry regulations regarding brake pad performance.
- A Rotor’S Minimum Thickness Specifications Are Based on Heat
- Wet Brake Rotors Increase Stopping Distances
- Brake Rotors Warp
- All Rotors Are The Same
- New Rotors Need to Be Machined
- Micrometers Aren’T Necessary
FALSE. The minimum thickness specification—or discard—is based on the travel of the caliper piston if the pads are worn to the back plates. If your pads are particularly worn and the brake rotor is below specification, there’s a chance the piston will start to leak and dislodge from the bore, causing total brake system failure. Which is bad. Heat, ...
TRUE andFALSE. Remember when you were first learning to drive and were taught to tap the brake pedal after driving through puddles? Well, back in the days of drum brakes, this was solid advice. But now we’re mostly dealing with disc brakes, and this brake pedal-tapping advice no longer holds water—literally. When vehicles move, the disc brake rotor...
FALSE. Rotors don’t warp. Back in the 1970s, in what was probably a scene right out of the movie Dazed and Confused, someone came up with a theory about brake-rotor “warping,” and it totally stuck. Why? Probably because, in layman’s terms, it makes sense. But then real life happens and this faulty explanation doesn’t hold up to scientific scrutiny....
FALSE. Even if a rotor fits a vehicle, it may not be the most appropriate rotor for that particular vehicle or driver. Low-quality rotors may have compromises in structure and metallurgy that might feel good on the wallet, but won’t seem so awesome when it comes time to stop safely or have your brake system perfoming up to standard during any type ...
FALSE. New rotors should be finished to specifications and ready to install out of the box. There shouldn’t be a reason to give them a “clean-up” cut. If they do need a cut, then you should probably find a new rotor supplier. Machining new rotors will shorten their life. It may also leave a rougher finish on the rotor surface. The manufacturing tol...
FALSE. Some shops measure rotors with the naked eye. Some brake techs suggest that quality measurement tools either don’t exist or aren’t affordable. Not true. If you want to perform high-quality brake pad or rotor replacement jobs, you should definitely have a quality micrometerin your toolbox to measure rotor thickness. SOURCE: Raybestos
Nov 8, 2023 · Do brake rotor brand matter? Absolutely. The brand and engineering quality mean everything when it comes to brake rotor performance and longevity. Low quality, cheap rotors often warp or wear out quickly. Reputable brands produce rotors that last.
In this article, we examine brake rotors and provide real answers to your questions. How do they work? What are they made of, and how long can they last? What causes a rotor to warp? Can rotors be repaired? When is it time to replace a rotor, and what are the symptoms to look out for?
Mar 27, 2020 · If you see what looks like a large metal plate, platter or disc, that part is the brake rotor. The brake pads on your car press against the brake rotor, sometimes called the brake disc, to stop the car. Depending on your year and model, you might have rear disc brakes as well.
Jul 29, 2024 · Slotted rotors are generally more durable than drilled rotors and are less likely to crack under high stress. However, they can cause increased wear on the brake pads. Drilled and slotted rotors combine the benefits of both drilled and slotted designs.
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