Centrifugal force is the apparent force that is felt by an object moving in a curved path that acts outwardly away from the center of rotation.

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Typically, you’ll see an equal distribution of forces on each ball. Because the balls contact the raceways at an angle the resultant forces will radiate outward and in line with the bearing axis.

Radial load vs axial loadbearing

No built-in ball bearing support. Good for large orders & low to high torque needs: 1 to 2673 Nm. Bore (ID) sizes: 2 to 240 mm (0.078 to 9.448 in)

Wheel bearings are also responsible for supporting the entire weight of the vehicle when driving. This is the reason why wheel bearings face a lot of misuse at the hands of potholes, rough roads and lateral forces when the vehicle turns.

To save yourself from unforeseen situations on the road always have the wheel bearings inspected and replace them if necessary.

We know that not every application requires super, high-precision bearings. We stock other industrial parts from quality brands.

If your application will place an axial load on the bearing, then an angular contact bearing with a higher contact angle around 25° will be a good bearing choice.

Before we get into the details of bad wheel bearing symptoms we must know what is the actual purpose of a wheel bearing. As mentioned above, wheel bearings fit in the hub. They ride on a metal axle shaft and their purpose is to help reduce friction when the wheel spins.

Radial loadexample

Includes built-in ball bearing support. Supports MEDIUM loads & low to medium torque capacity: 53 to 267 Nm. Bore (ID) sizes: 17 to 40 mm (0.669 to 1.57 in)

Radial load vsthrustload

Centrifugal loads come from the rotational speed (RPMs) of an application. High-speed applications can produce a powerful centrifugal load which can sometimes be the reason for the max speed of an application.

If there is a howling noise taking place during deceleration, it is pretty much because of a loose pinion-bearing preload. However, if the howling noise happens during acceleration at different speeds, it is probably because of worn out gears. Moreover, bearings that are overly worn out also tend to make a howling noise and make a rumbling sound when turning.

A bearing supports many different load combinations but most types of application loads can be boiled down to these four main groups:

Some examples of a radial load on a bearing are the weight of a horizontal shaft assembly, gears, pullies or cutting tools.

Radial loadformula

Those were the most common symptoms of bad wheel bearings. The problem of bad wheel bearings is not to be taken lightly as it comprises the ride quality of your vehicle. It also has a negative impact on the competitiveness of tyres. But most importantly, driving with bad wheel bearing is a big safety threat.

Axial loads transfer force in an equal, uniform way onto the rolling elements thereby creating a balanced load distribution.

Bearing preload is a predetermined load that is applied to a bearing and is separate from application loads. Adding a preload establishes an optimal synergy between the rolling elements and the bearing races.

If the application has high Hertzian pressure, then changes may need to be made to the application to reduce the pressure.

So far, all the loads we’ve discussed are from a contact force that is transferred from one bearing ring to the other bearing ring through the rolling elements.

When in operation, the shaft assembly pushes radially on the inner ring of the bearing transferring a load through the rolling elements to the outer ring.

Generally speaking, if you are designing a high-speed application consider using a light preload on your angular contact bearing. We recommend our SM angular contact bearings or KH angular contact bearings.

But what we haven’t mentioned is that this contact force creates pressure where the rolling element is pushing on the raceway; this is called Hertzian contact pressure or Hertzian stress.

A few solutions could be changing the bearing size, using ceramic balls, or adding more bearings to the system to help divide up the loads.

For steel AISI 52100 ball bearings, the stress limit is generally accepted to be 4,200 MPa. GMN considers Hertzian contact pressures above 1,500 MPa for steel balls and 1,800 MPa for ceramic balls to be close enough to the stress limit to have a significant impact on the overall life of the application.

Axial loadexample

Wheel bearings are different from engine bearings. Case in point: there is no constant source of lubrication for the wheel bearings. This is why they have to be tight enough to keep water and road dust away from them.

Usually, if you hear a chirping, growling or squealing noise it is because of a bad wheel bearing. The sound gets worse with every turn or disappears momentarily if the wheel bearings go bad.

Wheel bearings are present in the centre of the wheel inside a hollow piece called the hub. They are held by a metal ring known as the race. For the hub, tyre and assemblies to work properly, wheel bearings are critical. This is why it is necessary to know all about the symptoms and causes of bad wheel bearing.

Regardless of the type of bearing your vehicle has, the warning signs for all types of wheel bearings are the same. Symptoms of bad wheel bearings include:

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Our GMN Gap Seals are plastic and a great choice for washdown applications, such as food conveyors and food manufacturing facilities

The rolling element directly under the application load is usually the one that’s receiving the most force. Then each successive rolling element, in both directions, transfers less and less load to the other.

A bearing load is defined as the force that’s transferred from one bearing ring, through some or all the rolling elements, to the other bearing ring.

This heavy-duty clutch (aka a hold-back clutch) is good for high torque operations and ensures motion freezes in place. Bore (ID) sizes: 15 to 40 mm. (0.59 to 1.73 in)

Usually, you’ll find an axial load directly in line with the shaft, like a drill. Other times an axial load can be a reactive load offset from the shaft axis, like a bevel gear.

We hope you found this article helpful. If you’d like further information on bearing loads, our on-site engineers would love to discuss it with you. Fill out our contact form or give us a call at 281.858.7000.

Axialandradialdirection

This article will discuss these four types of application loads, how it affects the bearing and what bearing to choose that will best support the application load.

A bearing’s ability to withstand a load is determined by how close the Hertzian contact pressure is to the stress limit of the bearing. The closer it is to the bearing’s stress limit, the less time it will take for the bearing to experience plastic deformation.

Axial loadformula

On the other hand, if you are designing an application that needs tight rigidity and precision then you may want to consider a medium or heavy preload on your angular contact bearing. We recommend our S angular contact bearing series.

Engineers should think about bearing loads when designing a new application, tweaking an existing application, and especially after a bearing failure or malfunction.

It is no secret that cars cannot operate without wheels. Wheel itself is made of many parts  including the tyre, rotor, stator, bearing and capacitor, among others. Wheel bearings are a set of steel tapers or balls often known as wheel bearings, tapered bearings or ball bearings.

If an application requires high speeds, consider using an angular contact bearing with smaller balls, like our KH series.

Radial loadbearing

Designed with grooves in the outer ring to offer more protection (than our L-type seal) against contamination and direct spray liquids. Liquid gets pushed out through outer grooves when in rotation.

Another option is to switch from bearing steel balls to ceramic balls. All our GMN angular contact bearings and radial ball bearings are available with ceramic balls.

Just to add some complexity to this, axial loads that are offset from the center of the axis, like a bevel gear, have a “moment force” applied to the inner race. When a moment force is applied, the load distribution on the bearing’s rolling elements isn’t as uniform.

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The quickest way to estimate a bearing’s lifespan and performance is by knowing all about the application load that will be placed on the bearing.

If your application will place a radial load on the bearing, then either a radial ball bearing or an angular contact bearing with a low contact angle will be a good bearing choice.

In a rotating bearing, the interaction between the rolling elements and the outer ring produce a centrifugal radial load, here’s how:

Vehicles make many sounds and while there are many reasons your car makes a humming noise; one reason is a bad wheel bearing or CV joint.

The most common type of ball bearings are wheel bearings and roller bearings. The latter isn’t as versatile as the wheel bearing. Other types of wheel bearings include precision ball bearings for intense radial loads and tapered roller bearings used for trucks.

Includes built-in ball bearing support. Supports HEAVY loads & has a high torque capacity: 53 to 588 Nm. Bore (ID) sizes: 10 to 60 mm (0.393 to 2.362 in)

You must also pay close attention to the car tyres. Keep rotating them regularly to prevent them from frequent wear. That said, if you notice your vehicle has extremely uneven wear despite rotating tires, you may want to get the wheel bearings checked.