VIDEO: Wheel Bearing Preload And Load Paths

VIDEO: Wheel Bearing Preload And Load Paths

If you're replacing a wheel bearing, you should also check the alignment. This video sponsored by GMB.

What is bearing preload – is it the same as play? Can a bad alignment cause a wheel bearing to wear out prematurely?

Well, actually the answer comes down to the word “preload.” Preload is not the same as end play. Preload is actually aligning the inner and outer races together and loading the bearings. So the rolling elements make proper contact with the two surfaces. This usually involves a nut and an axle that clamp the two together and set the load pass. When properly torqued down the axle nut will set the ball-bearings or other rolling elements in relationship to the inner and outer races. This is where the loads are carried.

So if this is not properly set, you’re going to have issues with the bearings wearing out too soon or having the wrong angular contact pattern. So how does this apply to our second question? How can a bad alignment angle cause a bearing to fail prematurely?

Well, we’re looking at the load path through the bearing. Just imagine a bearing has too much camber. Well, the load path changes on the bearing and where the bearings make contact and where the loads are carried. If you have too much toe and the vehicle is going down the road. Well, that changes the loads inside the bearing too. So keep this in mind. If you’re replacing a wheel bearing, you might also want to check the alignment.

This video is sponsored by GMB

You May Also Like

EV Safety Basics on the Shop Floor – Part II

As long as you follow the EV guidelines, you are going to have to use the proper PPE and insulated tools.

Staying safe while working on an electric vehicle requires the correct shop equipment as well as the correct personal protective equipment (PPE) and shortcuts are simply not an option. Let’s take a look at everything you are going to need.

We’ll start with PPE and electrical safety gloves. Class zero electrical insulating gloves rated for 1000 volts are required for EV service. Simply put, these gloves prevent high voltage from traveling through your hands, and they must be tested every time you use them by checking for a pinhole or any damage that could allow voltage to pass through a glove. A glove inflator is the most efficient way to do this. Insulating gloves must also be clean and dry so there are no conductive substances that can allow high voltage to travel outside the glove to your arm. Treat these safety gloves with extreme care. They can be damaged easily and they’re sensitive to UV rays, so they should be stored in a dark, dry environment. A ventilated UV-resistant bag is the best option. Safety gloves must also be re-certified every six months. You’ll also wear them with a leather outer glove to protect them, most prefer to wear an inner cotton glove as a liner to allow your hands to breathe.

EV Safety Basics on the Shop Floor – Part I

It’s critical to utilize OEM service information and procedures for each and every hybrid or EV.

Autel MaxiSYS Ultra Enhances Efficiency At Mighty Auto Pro

Time is money in vehicle repair, and the Autel MaxiSYS Ultra is all about enhancing technicians’ diagnostic prowess.

Empowering the Automotive Aftermarket Through Collaboration

Distributors, manufacturers, training institutions, associations and service providers all help automotive professionals stay ahead in a market that is constantly evolving with new technologies, trends and customer demands.

Understanding LSPI & Engine Oil

Using the correct manufacturer-recommended oil is crucial for peak performance and long-lasting engine health.

Other Posts
Randy Breaux, Group President, GPC North America, Talks to AMN Drivetime

At NAPA, “Breaux Knows” business relationships, ABCs to avoid, and serving the automotive professional.

Serpentine Belt and Drive System Maintenance

Properly maintaining the entire drive system prevents premature belt wear and system failure, ensuring customer satisfaction and vehicle reliability.

How Modern Car Sensors Optimize Performance and Emissions

Learn how Standard ensures accuracy, speed, and durability in their sensors to maximize engine performance and efficiency.

Chassis Parts and Alignment Angles

Knowing why the adjustment is required is critical to performing the total alignment.