In this guide, we’ll take a look at the different types of bearings used in construction machinery. By understanding the types of bearings available, as well as their functions and maintenance requirements, you’ll be well-equipped to choose the best bearings for your machine.

Slew bearings consist of large-diameter rings with integrated raceways. They're designed for rotational movement and are often quite large.

Function: Tapered rollers reduce friction while simultaneously supporting axial and radial loads. The tapered design helps distribute the load evenly.

Bearings play a key role in heavy equipment. They enable components to move around each other freely, limiting friction and keeping wear to a minimum.

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Since the choice of lubricant tends to vary by the type of bearing and machine, it’s crucial to consult the equipment’s manual and follow the manufacturer’s guidelines for specific recommendations.

The EquipmentShare Shop carries OEM and aftermarket bearings for heavy construction equipment. Our extensive parts catalog makes it easy to find replacement bearings and other parts for your machine. If you’re struggling to find the specific component your equipment needs, reach out to our parts experts and get personalized assistance.

Choosing the right replacement bearing for your machine is critical to ensure optimal performance. Here are some key factors to consider when selecting a replacement bearing for your machine:

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Uses: They are used in equipment requiring flexible and multi-directional movement, such as articulated dump trucks and backhoes.

By keeping these factors in mind, you can select the right replacement bearing that meets your equipment’s needs and ensures efficient operation.

Function: Ball bearings allow for smooth, low-friction rotational motion. The balls roll within the races, reducing friction and supporting axial and radial loads.

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The type of lubricant to use depends on the bearing type and the manufacturer’s recommendations. Commonly, bearings are lubricated using either oil or grease. Oil is used in bearings with high-speed applications, while grease is the general solution preferred for most heavy equipment applications.

All heavy equipment relies on moving parts that slide or rotate around each other. To reduce friction between moving parts, special components called bearings are used in strategic locations throughout a machine’s design. Bearings reduce wear between moving parts and allow machines to work more efficiently. Without bearings, modern machines would be unable to function.

Needle bearings use long, thin cylinders (needles) as rolling elements, offering high load-carrying capacity in a compact design.

Uses: Ball bearings are used in a wide range of heavy equipment, including excavators and bulldozers. They facilitate smooth rotation in machine parts like wheels, gears and shafts.

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Uses: Slew bearings are essential components in heavy machinery requiring continuous, full-circle rotation, like cranes and excavators.

While ball bearings are the most common, they aren’t the only type of bearing found in heavy equipment. There exists a wide array of bearings used for different purposes in modern heavy equipment.

While there are countless types of bearings, some are more common than others. Here are the types of bearings most commonly used in construction equipment.

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Failing to properly maintain your machine’s bearings may lead to a host of problems such as reduced equipment lifespan, increased friction and wear, contamination of the bearings, excess noise and vibration, and even safety risks.

In addition, machines that feature large, rotating components commonly use bearings. For example, the operator cabin of an excavator is connected to the excavator’s undercarriage via a large slew bearing. This specially-designed bearing allows an excavator’s operator cabin to rotate freely atop the undercarriage 360o in any direction.

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Cylindrical bearings have cylindrical-shaped rollers instead of balls, offering a larger contact area compared to ball bearings. They excel in load-carrying capacity.

Bearings can be found in nearly all types of construction equipment, although not all types of bearings are used in every machine. Whenever two components need to rotate around each other in a spinning motion, bearings are typically found.

Function: These bearings handle radial loads effectively by distributing the load along the length of the rollers. They can also accommodate some axial loads.

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Uses: Tapered roller bearings are common in wheel assemblies of construction vehicles like dump trucks and loaders, where they support heavy loads and maintain wheel alignment.

Ball bearings consist of inner and outer rings with spherical balls placed between them on races. They are known for their low-friction, high-speed capabilities and are commonly used due to their simple design and efficiency.

Tapered roller bearings have conical rollers that are larger at one end. This design enables them to handle both radial and axial loads.

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Uses: Cylindrical bearings are found in heavy equipment like cranes, where they support crane hooks and lift heavy loads.

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Motion Industries is an industrial parts distributor for products including bearings, mechanical power transmission, electrical and industrial automation, hydraulic and pneumatics, process pumps, hydraulic and industrial hose and industrial/safety supplies. It also provides fabrication and repair services.

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Function: Joint bearings accommodate oscillating, tilting and rotating movements in construction equipment components like hydraulic cylinders, steering linkages and suspension systems.

Not all heavy equipment bearings need to be lubricated regularly, but many do. A bearing’s lubrication requirements will depend on the bearing type and its location, as well as its design. Some bearings are sealed or pre-lubricated, while others require ongoing lubrication.

Joint bearings, also known as rod ends, have a spherical inner ring with an outer ring or housing. They allow articulation in various directions.

The most common type of bearings are ball bearings. As their name suggests, ball bearings feature two concentric rings that spin around each other on a series of steel balls, which sit in a track between the two rings. The spinning action of the steel balls helps the concentric rings spin around each other freely, reducing friction to a minimum.