Testing for Brake Rotor Quality

Testing for Brake Rotor Quality

When it comes to making brake rotors, there’s a lot that goes into testing them to ensure the internal structure, metallurgy and performance of the rotor is in good working order. One aftermarket rotor testing procedure can help ensure that the brake rotor is in tip-top shape.

That procedure is titled the J2928 Brake Rotor Thermal Cracking Procedure for Vehicles below 4,540 kg GVWR. Wow, what a name! The Society of Automotive Engineers (SAE) has approved this test to measure brake rotor thermal cracking under specific conditions.

This document merged together current industry tests and best practices, and the goal was to create a standardized test that could evaluate the aftermarket rotor’s ability to resist cracking using a dynamometer since rotors have to be able to withstand thousands of heat cycles without cracking or structural failure.

The procedures of the test, called the SAE J2928 for short, subjects a rotor to 150 heat cycles. A heat cycle is when a rotor is cold and then brought to a high temperature. During the heat cycle, a rotor will expand and contract, which can create fatigue in a rotor that can cause cracking and structural failure.

The rotor is inspected during the 150 heat cycles, which includes a dimension check and an inspection for damage. The goal of the test is to thermally and mechanically stress the rotor so any issues with the metallurgy or structure are exposed.

The J2928 also covers how to document and classify cracks, and unlike a USDA-grade or movie rating, this test is just a document and recommended procedures, and it is then up to the industry to adopt and embrace these tests.

Comparing and evaluating rotor manufacturers as well as adding consistency and accountability could benefit the supply chain and shops directly. It helps everyone in the supply chain speak the same language and sets criteria for measuring aftermarket motors.

You May Also Like

Educate Your Customers to Build a Trustworthy Relationship

In this Continental Tire Garage Studio video, we talk about how tire dealers across the country build trust with customers.

Don’t you wish everything aged like a fine wine? While wine gets better as the years go on, we humans are subject to old age and wrinkles and our great inventions like cars get rusted and worn out. The tires on those cars get worn out, too. Like our bodies, the more miles you put on tires, the more they wear down.

What Do Tire Wear Patterns Mean?

From previous videos, you know that tire tread wear patterns can be clues to other things going on with the vehicle. In this Tire Review Continental Tire Garage Studio video, we look at some suspension components that a tire’s tread might be sending a message about. Related Articles – Nonprofit Changing Gears is Eliminating Transportation

Reading Tire Wear Patterns

Maddie Winer, Tire Detective on the case. Did you know that just by looking at a tire, its tread wear patterns can tell you if the alignment angles, inflation and suspension components are within specification? Related Articles – Understanding Digital Vehicle Inspection Data with Hunter Engineering [VIDEO] – What are Commercial Tire Expectations in 2023?

Why Winter Weather Affects TPMS

Winter is here, which could mean unexpected TPMS issues for your customers. In some parts of the country, arctic temperatures and massive snowfall create nasty driving conditions, opening the door for tire pressure issues to form and sensors lighting up dashboards. Related Articles – AMN Drivetime: MEMA Leaders Chat About the Future – Preparing Your

Preparing Your Tire Shop for the Winter Season

Oldman Winter is starting to wake up. Before you know it, roads in many parts of the country will look more like skating rinks than areas to drive. While stocking up on winter tires may seem like the best option, things aren’t that simple. Related Articles – Should You Re-Use Wheel Weights? – Improve Your

Other Posts

Continental Tire Partners with Random Vandals Racing

Continental Tire announced a partnership with Random Vandals Racing, a BMW customer racing team based in Concord, North Carolina. The team will compete in 10 World Racing League (WRL) events across the nation beginning with NOLA Motorsports Park which kicks off the 2023 season on January 20-22. Related Articles – Monro Q3 Results: Strength in

Top 10 Stories of 2022

As the tire industry continues to recover from pandemic supply chain strains, 2022 brought a host of new tire launches as well as excitement around emerging tire trends… and topics that make you scratch your head. I think you’ll definitely see what I mean in this year’s list of top stories from 2022. Related Articles

Continental Issues Voluntary Exchange Program for PLT Tires

Continental announced a global voluntary exchange program for a total of 7,103 tires from different product lines. In the US market, a total of 2,937 tires are eligible for the exchange program that was sold through the tire replacement business or are still in tire dealers’ inventories. Related Articles – Off-Road Racer Jim Horne Joins

Bridgestone Recall 1400
Last-Mile Delivery Tires Set to Outpace Long-Haul Tire Volumes

Prior to the pandemic, the last-mile delivery (LMD) market was booming. So, when COVID-19 hit, and newly-homebound consumers placed even more online orders — retailers like Amazon shortened delivery times to two days, one day, or even same-day services — and the segment exploded. Related Articles – Bridgestone Provides A/T, Winter Tires for Lamborghini Huracán

Ford-E-Transit