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Wheel bearings have come a long way since the days when you had to repack them every several thousand miles, but they still do fail on occasion. Keep reading to learn how to identify a bad wheel bearing by the sounds it makes and what to do to avoid a wheel bearing to go bad.

We also know that sometimes you just don’t have the time to do the job yourself, so allow us to help you find a qualified professional mechanic through our Shop Referral Program.

Once you’ve done the road test and have an idea of where the sound is coming from, park your car, jack it up, and remove the tire. Don’t forget to use jack stands! With the tire off, rotate the bearing to see if there is undue resistance or if you can feel or hear clicks, grinding or other sounds coming from the bearing. It should be smooth and quiet. You can also try to wiggle it back and forth and there shouldn’t be any play in the bearing.

There are a few things to listen and feel for when attempting to diagnose a bad wheel bearing. Some of the sounds that we associate with bad bearings can also be indicators of problems with other parts of the vehicle, but there are a few tricks to test whether the noise is a bearing issue. Here are a few sounds that can indicate a bad bearing:

Bearings vary greatly in size. The smallest "miniature bearings" in the world have an outer diameter of 2mm and an inner diameter of 0.6mm. On the other hand, large bearings can reach up to 6 meters in outer diameter and are used in massive tunnel boring machines for tunnel excavation.

The size of a bearing is typically measured by its inner diameter (ID), outer diameter (OD), and width (W), and listed in the format "ID x OD x W." These measurements are usually given in millimeters, but can also be converted into inches. In fact, most bearing manufacturers and suppliers provide sizes in both metric and imperial systems.

Some of these symptoms can also be a result of bad tires, or even a bad CV joint, but a bad bearing will sound worse when it is put under load, like when the car is turning, so use this method to test and see if it is your bearing that’s causing the noise:

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Wheel bearings have come a long way since the days when you had to repack them every several thousand miles, but they still do fail on occasion. Keep reading to learn how to identify a bad wheel bearing by the sounds it makes and what to do to avoid a wheel bearing to go bad.

You may find that the car wanders on the road, your tires may wear unevenly, the friction heat from the failed bearing could damage other parts of the car, and the wheel could actually separate from your car.

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Which selection criteria to use depends on the bearing's operating conditions. For applications where bearings are running under normal operating conditions, use size selection based on rating life. For applications where bearings are running under low speeds or bad lubrication conditions, or where occasional peak loads occur, use size selection based on static load. In some applications, both selection criteria must be considered.

Back in the days of horses and carriages, wheels were attached to the carriage by way of a wooden or metal stick axle that was fixed to the carriage, requiring the wheels to rotate on the axle. A major drawback of this setup was that there was a lot of friction between the wheel and the axle, and that friction made it harder to move the carriage, resulting in wasted energy. The other issue was that the friction would cause a lot of wear and tear on the axle and wheel where they joined, so you’d need to do constant maintenance on the joint.

Start by listening for clicking, humming, or growling noises and feel for vibrations through the steering wheel. If you can pinpoint where the noises are coming from, the next step is to remove the wheel and do a physical inspection.

Since the wheel bearing is the sole point of contact between the car and the wheel, it’s very important that it is functioning properly. A bad bearing will be noisy, could lead to heat damage of other components, and could seize up or cause the wheel to break off the car, leaving the driver stranded.

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If you catch a wheel bearing right when it starts to fail, you probably will have enough time to get to the shop or your home and do the diagnosis and repair. Be aware that driving at highway speeds will intensify any bearing issues and could lead it to fail faster, so be prudent with your route.

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Each set of these measurements corresponds to a series number, often marked directly on the bearing. There are numerous bearing size charts available in the market to help identify specific bearing dimensions. The 6000, 6200, and 6300 series are the most commonly used standard deep groove ball bearing series, with sizes ranging from 10 x 26 x 8 mm (0.394 x 1.024 x 0.315 inches) to 240 x 440 x 72 mm (9.448 x 17.322 x 2.834 inches).

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Click to learn the signs and symptoms of a bad steering column, how it can affect your steering, and how to repair it with AutoZone.

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Moline Bearing Company is an American manufacturer of Type E Tapered Roller Bearings, Ball Bearings & more, focused on the mechanical power industry.

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In this article, we will explore the significance of the ball bearing size chart and understand how to interpret and utilize it effectively.

Different sizes of bearings are used in different industries. Smaller ball bearings have more limited load capacities and are used in applications where space efficiency is more important than load capacity. Larger bearings have greater load capacities and are used for heavy-duty industries such as agriculture machinery, mining and drilling equipment, or heavy power tools. The proper bearing size is essential for optimal performance and to safeguard that the bearing can withstand the required load and provide the expected life.

Be sure to consult your owner’s manual, a repair guide, an AutoZoner at a store near you, or a licensed, professional mechanic for vehicle-specific repair information. Refer to the service manual for specific diagnostic, repair and tool information for your particular vehicle. Always chock your wheels prior to lifting a vehicle. Always disconnect the negative battery cable before servicing an electrical application on the vehicle to protect its electrical circuits in the event that a wire is accidentally pierced or grounded. Use caution when working with automotive batteries. Sulfuric acid is caustic and can burn clothing and skin or cause blindness. Always wear gloves and safety glasses and other personal protection equipment, and work in a well-ventilated area. Should electrolyte get on your body or clothing, neutralize it immediately with a solution of baking soda and water. Do not wear ties or loose clothing when working on your vehicle.

Advice, how-to guides, and car care information featured on AutoZone.com and AutoZone Advice & How-To’s are presented as helpful resources for general maintenance and automotive repairs from a general perspective only and should be used at your own risk. Information is accurate and true to the best of AutoZone’s knowledge, however, there may be omissions, errors or mistakes.

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A sleeve bearing (also known as a bushing bearing or plain bearing) is a straightforward and fundamental type of bearing. It primarily consists of an inner metal sleeve (known as the bushing) and an outer metal sleeve. Between these two sleeves lies a layer of special lubricating material, typically a sliding surface coated with grease or oil.

Your wheel bearings impact efficiency and keep the wheels attached to your car, so it’s important to use the best possible parts to complete any repair. Replacing your own wheel bearings can be an afternoon or evening job, depending on the make and model of your vehicle, so do a bit of research and don’t be afraid to tackle this important repair yourself.

Your safety should always come first. Learn the safest way to use wheel chocks and how to keep your stationary car from rolling.

The first caged bearings for axles were patented in the late 1700s, and the design that has carried forward to modern times is basically a set of steel balls or rollers that are housed within a ring-shaped housing called a race. Most ball bearings will have an inner race, which is grooved and holds the balls on the inside, and a grooved outer race on the outer circumference of the bearing. In a roller bearing, the race has slots that allow the rollers to spin against the axle on the inside and the wheel on the outside.

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When it’s time to shop for a new wheel bearing, AutoZone has all the parts and tools you need to keep your car rolling, and we have locations in every state that you can find by using our Store Locator.

In automotive applications, the wheel bearings are usually sealed units that connect the wheel to the suspension of the vehicle. Your wheel studs will typically be part of the bearing and if it is a drive wheel, there can be a hollow in the middle of the bearing where a spindle is inserted from the axle shaft.

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It is commonly referred to as "bearing" in English, while in Taiwan, it is usually called "軸承". The fundamental principle of a bearing involves the placement of rolling elements, such as balls, needles, or rollers, between the inner and outer rings to facilitate smooth rotation of the shaft.

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