SKFdouble row ball bearingsize chart

Typically, wheel bearings have a lifespan of around 85,000 to 100,000 miles, so if your car is approaching these kinds of figures, it’s important to keep an eye on the tell-tale signs of a bearing in decline.

Confident in car maintenance DIY? Lubricate and service your car’s wheel bearings with Holts Multi-Purpose Lithium Grease. Trusted by professionals, it reduces friction and wear in all moving parts, even those that work under extreme pressure. For more top tips and advice, read the Holts blog or visit our help and advice centre.

Double row ball bearinguses

Continuing to drive on a bad wheel bearing can lead to extensive and critical damage which will be significantly more expensive to repair than a simple bearing re-grease and service. And in the worst cases, the damage from a faulty bearing that goes untreated can prove impossible to fix, particularly if it contributes to corrosion of surrounding components and the axle.

If you’re aware that there’s an issue with your car’s wheel bearing, it’s best to take it straight to a mechanic for a full diagnosis and repair. Often, it may just be a case of relubricating the ball bearings within the assembly before repacking them, which is significantly simpler to put right than the alternative.

Double row ball bearingSKF

To do that, you’ll first need to jack up your car so that both wheels are off the ground. We would strongly recommend using service ramps for this to ensure you can carry out the following checks safely.

Need to recap the signs of a failing wheel bearing? Here are the symptoms to watch out for while you’re driving, particularly when turning corners:

Double row ball bearingcatalogue pdf

Timken® two-row, or double-row, cylindrical bearings offer added radial capacity and are interchangeable. Dimensions and diameters under the rollers (NNU style) and over the rollers (NN style) meet ISO standards.

The cost of a wheel bearing replacement in the UK is roughly £150-£300, dependent on the make and model of your car and a mechanic’s labour costs. The good news is that you don’t need to replace all wheel bearings at once if the other three remain in a safe and serviceable condition.

When the car is elevated and in place, take hold of each wheel in turn and wiggle it backwards and forwards, side to side. If there is any play in the wheel, it feels wobbly or loose, or an unusual noise accompanies some minor movement, then you’ve found the problem wheel.

Double row ball bearingsize Chart

Suspect that your car is suffering from a faulty wheel bearing? Our guide can help you check and diagnose the problem, and decide if and when it’s still safe to drive.

SKFdouble row ball bearingcatalogue pdf

Given the damage that can occur as a result of a failed wheel bearing, not to mention the dangers, this further reinforces the importance of getting those bearings checked and repaired the moment you realise there’s a problem.

Once you’ve performed this basic wheel bearing test, you should have a better idea of where the problem is. Then, it’s a case of diagnosing the front or rear wheel on the side in question.

Replacing all of your car’s wheel bearings might cost an eye-watering sum, but it’s guaranteed to be a lot cheaper than repairing the damage should a bearing fail.

Two-row, or double-row, cylindrical bearings are designed for additional strength in carrying radial loads. These bearing types are interchangeable so the dimensions and diameter under the rollers (NNU style) and diameter over the rollers (NN style) are held to an ISO/DIN standard. Interchangeability is designed for the ring without the rollers to allow interchange with competitor inner rings.

Timken® two-row, or double-row, cylindrical bearings offer added radial capacity and are interchangeable. Dimensions and diameters under the rollers (NNU style) and over the rollers (NN style) meet ISO standards.

As you’ll know from our car maintenance glossary, bearings allow the wheels to turn freely without generating huge amounts of heat. If a bearing were to fail, the wheel can seize up altogether, resulting in catastrophic damage and the potential for a serious incident. Indeed, in the very worst-case scenario, a failed bearing can cause the wheel to rip away from the car entirely.

You can still drive with a bad wheel bearing, but we wouldn’t recommend it for long distances. Keep your mileage to a minimum and look out for worsening symptoms of a wheel bearing fault; we cover the symptoms to check for later in this guide.

If you suspect you have a wheel bearing fault but aren’t sure which side of the vehicle is affected, there’s a safe and simple test you can use to check. Our step-by-step guide below can take you through how it’s done…