Cracking the Code, Understand Friction Material Edge Codes

# Cracking the Code, Understand Friction Material Edge Codes

Just about every brake pad or shoe you install has a cryptic code printed on the side of the friction material. As a technician, being able to read this code is just as important as the Dewy Decimal system is to a librarian.

The “Edge Code” can tell you information about the product you are about to install. These letters and numbers can help you select the right friction material for a vehicle and its driver.

Edge Code is a language written by engineers, federal entities and industry associations. Like any language, edge coding has its own “grammar” that has been defined by standardized vehicle and laboratory tests.

SAE AND THE TWO-LETTER TANGO
If you are to take one thing away from this article, it should be how to read the letters that correspond with the friction levels of the brake compound. These are two letters are midway through the code. But, to understand the letters, you must first understand the tests behind the letters.

Friction is a resistive force that prevents two objects from sliding freely against each other. The coefficient of friction: The Greek letter

# How Regenerative Brakes Operate

#### Regenerative braking is a hybrid’s first choice for braking.

A hybrid vehicle is a different animal than many of us are used to seeing. After all, if the engine of a typical vehicle stalled out at a traffic light, the driver of that vehicle would know something was wrong with it. If that same vehicle still drove with the engine off, then that would mean they were probably going down hill. But, in the hybrid world, that is all normal. Systems around the vehicle are impacted by two key features:

##### Spotting Brake System Failures

The main culprit of friction material separation is typically corrosion.

##### 10 Tips For Servicing Hydroboost Brake Units

Hydroboost brake systems are self-bleeding if there is no other problem in the system.

##### Brake Pad Errors and Mismatches

In order to make the right selection, you must do your homework while still remaining skeptical.

##### Axle Torque Procedures

Guessing the correct torque setting is a bad idea.

#### Other Posts

##### What Do The Marketing Messages Mean?

Certain messages mean certain things – or not. When selecting automotive components, do your homework.

##### How to Address Brake Noise Issues

As a tech, you’re familiar with one of the most common reasons customers bring their vehicles into the shop: unpleasant noise emitted when they press down on the brake pedal.  The key to managing brake noise is to first determine where it’s coming from and what could be causing it, which means checking several different

##### Top 10 Wheel Bearing Torque Tips

A torque wrench is an essential tool when it comes to installing wheel bearings. Here are the top 10 tips to remember.