What Are Drum Brakes and How Do They Work

What Are Drum Brakes and How Do They Work
The Drive and its partners may earn a commission if you purchase a intersection through one of our links. Read more. You might not give your car ’ s brakes much thought until they cause a problem, but there ’ s a solid world of things happening every time you press the brake pedal. Though most cars today come equipped with disk brakes, many still have drum brakes. That ’ s even more true for older vehicles, as disk brakes have only become rightfully omnipresent in the last match of decades. If you think your car has drum brakes, there ’ s no reason to panic. equitable because it ’ s an older technology doesn ’ metric ton average it ’ s not utilitarian. In fact, even if your recently manufactured cable car has drum brakes on the rear, it probably has discs up front—where most of the cable car ’ s stopping power originates.

Drum brakes do have their limitations, however, so you ’ ll want to take the clock to understand what they are, where they fall light, and what you can do about it. Let The Drive ’ s editors take you through some of those hoops in this mail, and will shed some light on what ’ s going on when you press the brake pedal point. Let ’ s get started… or, you know, stopped .
Drums are much different than discs.
Drums are a lot unlike than magnetic disk .

How Do Drum Brakes Work? 

Unlike magnetic disk brakes, which use a rotate phonograph record with calipers and pads and which are broadly considered to be more effective and safe, drum brakes use a rotating cylinder with brake shoes mounted inside to slow a vehicle. When the driver presses the bracken pedal, brake fluid generates hydraulic pressure and presses brake shoes against the rotating drum. The shoes are made with materials that generate clash, which is what ultimately slows the vehicle. In the past few decades, magnetic disk brakes have overtaken drum brakes as the stopping impel of choice for most new vehicle manufacturers. It ’ south hush possible to buy a raw car with drum brakes, but they ’ re by and large entirely used on rear wheels with disk brakes on the front .

What Are The Different Types Of Drum Brakes?

There are three main types of drum brakes :

Leading-Trailing Shoe

In drum braking systems, the leading shoe is one that rotates in the direction of the drum. The trailing horseshoe is on the other side of the assembly, and pulls away from the rotating open. Leading-trailing brake shoe braking systems are equitable as capable of stopping reverse gesture as they are at stopping forward. This type of cram brake is typically used for rear-wheel applications .

Twin-Leading Shoe

Twin-leading shoe braking systems feature two leading shoes that make contact with the drum. These systems operate with what is known as a self-servo effect, in which the shoes only need to be pushed into contact with the barrel to be effective. The shoes ’ form, combined with the rotation of the drum, naturally forces them outbound into the drum. These systems need knock-down springs to pull the horseshoe back when braking violence is not necessary .


Duo-servo brake systems are a more advance version of twin-leading shoe brakes. In this brake system, the two shoes are linked. When the leading horseshoe is pressed out by the roulette wheel cylinder, the rotating force helps press the secondary shoe into the drum .
Drums use shoes instead of pads.
Drums use shoes alternatively of pads .

That Sounds Fancy. Why Are Disc Brakes  Better?

Disc brakes carry several improvements over brake drum brakes, including :

Temperature Regulation

Brakes generate heat. It ’ s what they do. Disc brakes are better at dissipating heat and are able to maintain stopping power with repeated use.

Better Wet Performance

Because of their determine, brake drum brakes are susceptible to water pooling inside, which negatively impacts operation. In magnetic disk bracken systems, the rotor can ’ thyroxine hold water system and the bracken pads act about like a squeegee to wipe away moisture .

Less Likely to Lock

Disc brakes are less likely to lock up under heavy brake, which makes them safer during evasive maneuvers .

Explanation of Drum Brake Terms and Disc Brakes

Get educated .

Disc Brakes

Disc brakes use a caliper and two brake pads to apply pressure to a spinning disk. The caliper squeezes the pads onto the rotor, which generates friction and shows the wheels ’ rotation .

Anti-Lock Brakes

Anti-lock brake systems, or ABS, exploit with the vehicle ’ s onboard calculator to determine when a brake lock in site is about to occur. The system will then cause the brakes to pulse on and off quickly, which allows the driver to slow the vehicle while remaining in see. If a lockup occurs, the vehicle will continue traveling in the commission it was to begin with .


friction, which in the lawsuit of brakes is caused by either a bracken shoe contacting the drum or a brake pad contacting the rotor. friction is electric resistance to motion and generates a considerable sum of estrus .

Brake Fade

Brake fade is a condition in which the brake organization loses potency, normally due to heat overload. The decrease in braking power is caused by a decrease in the friction generated between the shoes and brake drum .

Brake Fluid

Brake fluid is a liquid that a fomite ’ mho braking systems use to generate the “ pushing ” power it needs to squeeze the brake shoes onto the brake drum. Braking systems use brake fluent to generate hydraulic blackmail, which helps move components and stop the fomite .

Sometimes You Need a Certified Mechanic

a much as The Drive loves to put the “ you ” in do-it-yourself, we know that not everyone has the proper tools, a safe workspace, the spare time, or the confidence to tackle major automotive repairs. sometimes, you good need quality rectify work performed by professionals you can trust like our partners, the certify mechanics at Goodyear Tire & Service .

FAQs About Drum Brakes

You ’ ve got questions, The Drive has answers !

Q. Can I Upgrade My Drum Brakes?

A. Yes, you can. In fact, many people consider the drum-to-disc conversion as one of the best prize upgrades you can do for a vehicle, specially one that will be driven hard. The costs and difficulty will vary, depending on your vehicle, but it ’ s not rocket skill and should be able to be done at home over a weekend .

Q. Are Disc Brakes More Expensive To Buy And Maintain?

A. Disc brakes are more expensive, both to buy and to maintain. Prices have come down over clock as the components have become more widespread, but disk brakes are still more expensive than barrel brakes and can cause the initial cost of a vehicle equipped with them to be higher .

Q. Why Are Disc Brakes Safer Than Drums?

A. Disc brakes are considered to be safer for a bunch of reasons, chiefly because they are :

  • Less likely to lock up
  • More capable of remaining useful when hot
  • Not as susceptible to water intrusion

Q. Can I Upgrade My Drum Brakes?

A. much like phonograph record brakes, drums will let you know when something international relations and security network ’ t right. You may feel a vibration in the brake pedal or steering wheel, you may feel a profligacy in the pass brake, or there may even be a skin or squealing sound when you press the brake pedal .

Let’s Talk, Comment Below To Talk With The Drive’s Editors!

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reference : https://tonupboys.com
Category : Car Brakes