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Compare Plain Bearings VS Spherical Bearings With Their Applications

@hibondbearings · Sep 24, 2026 · 5 min read

Using the wrong bearing can reduce equipment life, increase repair and maintenance costs, and even cause downtime. Knowing when to use plain bearings or spherical bearings will help engineers to achieve cost-effective designs and greater reliability.

The trade-off between plain bearings and spherical bearings is that both reduce friction and allow movement, but certain working conditions favor one over the other.

Manufacturers in the United States are losing an estimated $50 billion per year due to industrial downtime, according to the U.S. Department of Energy. This blog discusses the differences between plain bearings and spherical bearings, along with their advantages and application areas.

What Are Plain Bearings?

Plain bearings are some of the most basic types of bearings. Plain bearings operate through sliding contact between two surfaces rather than rolling elements such as balls or rollers.

In contrast, rolling element bearings use rolling elements such as balls or rollers.

These bearing types use different materials, such as bronze, steel-backed composites, PTFE-lined bearings, and engineered plastic. Their simplicity makes them compact, inexpensive, and easy to maintain.

Apart from the different plain bearing types, some common varieties include:

Self-lubricating bearings.
Flanged bearings.
Sleeve bearings.
Thrust washers.
Composite plain bearings.

Because of their reliability and low maintenance requirements, plain bearings are widely used in pumps, machines, agricultural machinery, and electric motors.

What Are Spherical Bearings?

Spherical bearings, or spherical plain bearings, consist of a spherical inner race that fits inside an outer race. Unlike traditional plain bearings, they accommodate shaft misalignment along with heavy radial and axial loads. Their self-aligning property makes them a good choice for applications with movement or vibration.

These bearings use steel-to-steel or maintenance-free PTFE sliding surfaces, depending on operating conditions.

Difference Between Plain Bearings VS Spherical Bearings

It becomes simpler to understand the difference between a plain bearing and a spherical bearing through a direct comparison.

Features	Plain Bearings	Spherical Bearings
Design	Cylindrical sliding surface	Spherical inner and outer race
Alignment	Requires proper shafts and alignments	Handles shaft misalignment
Load Capacity	Moderate radial loads	Heavy radial and axial loads
Movement	Sliding rotation	Rotation with angular moment
Maintenance	Low depending on material	Available in lubricated and maintenance-free designs
Cost	Generally lower	Higher because of advanced design

Both are important industrial bearings that help solve different engineering challenges.

Pros of Plain Bearings

Plain bearings remain popular because of their potential advantages.

Low Operating Noise

Since they do not contain rolling elements, these bearings operate quietly, making them suitable for electric motors and household appliances.

Easy Design

Plain bearings are easier to install, manufacture, and replace because they have fewer components.

Compact Design

Their design allows these products to take up less space when installed and cuts down weight for adjacent machinery.

Cost-Effective

Typically, plain bearings are less expensive than other bearing types and are useful in numerous applications. When properly selected and maintained, they offer reliable performance in many industrial applications.

Their compact size helps reduce overall machinery weight while saving valuable installation space.

Low Maintenance

Modern composite and self-lubricating plain bearings require very little maintenance throughout their service life.

Advantages of Spherical Bearings

Spherical bearings offer several important advantages in applications with more demanding operating conditions.

High Load Capacity

Spherical bearings withstand heavy radial and axial loads and are well-suited for the most demanding industrial uses.

Compensate for Misalignment

Their spherical design allows the bearing to compensate for shaft deflection automatically and minor installation inaccuracies, helping equipment operate more smoothly.

Shock Resistance

These spherical bearings resist shock and vibrations, and continue to perform with no loss of efficiency in machines that undergo rapid shocks, impacts, and load changes.

Long Service Life

When the correct bearing is selected for the application, spherical bearings often deliver a long service life because they distribute loads and stresses more evenly across the bearing surfaces.

Performance in Dynamic Environments

Applications that have constant movement rely on consistent performance. Spherical bearings perform optimally during motion comprised of oscillations and angular rotation. They can be used in various situations that require non-constant movement.

Field Applications of Plain Bearings

Plain bearings are economical and dependable. Also, they provide application design flexibility. For this reason, they have become the go-to bearing design in numerous applications.

The following sections provide a partial listing of the numerous applications accommodated by these bearing types.

Agricultural equipment.
Electric motors.
Pumps.
Domestic appliances.
Fans or blowers.
Business equipment.
Conveyors.
Textile equipment.

Most of these applications have properly aligned shafts and carry modest loads. As a consequence, they provide a cost-effective alternative to other bearing designs.

Applications of Spherical Bearings

Spherical bearings are selected for applications involving heavy loads, continuous motion, or shifting alignment. The following applications are provided for illustration.

Construction equipment.
Mining equipment.
Robots.
Bulk material handling equipment.
Heavy agricultural equipment.
Suspension systems for passenger or freight railroads.
Machines for earthwork.

Hydraulic cylinders on excavators often use spherical bearings because the cylinder pivots during operation and experiences heavy shock loads.

All of these applications require bearings that operate under extreme conditions and in an unpredictable environment of load, vibration, and impact.

Which Bearing Should You Choose?

The characteristics of your apparatus can determine the answer to which bearing to use. The following characteristics can help you decide.

Load Requirements

Plain bearings can handle light loads. In contrast, spherical bearings can handle heavier loads.

Shaft Alignment

When shafts are properly aligned, the radial loads are minimized, and plain bearings work well. To accommodate misalignment, use spherical bearings.

Operating Environment

Moisture, dust, vibrations, shock loads, and other factors affect bearing performance. Knowing the operating environment enables better bearing selection.

Maintenance Requirements

Maintaining either type of bearing requires no additional costs. The service interval depends on the operating conditions, bearing material, and application requirements.

Budget

Plain bearings have a lower per-unit cost and therefore are more economical than spherical bearings for most machines.

But spherical bearings are more economical in the long run because, although they cost more to purchase, they are more reliable in challenging applications and have lower maintenance costs.

Factors to Consider Before Buying Industrial Bearings

Selecting bearings from a reputable manufacturer can improve long-term equipment reliability and performance.

A few things you should ponder before making a purchase are:

Supplier support.
Material specifications.
Load capacities.
Speed.
Lubrication.
Corrosion.
Temperature.
Certification.

By using high-end industrial bearings, machines that once required frequent maintenance may now need it less.

Achieve Optimal Machine Performance by Selecting the Right Bearing

Modern machinery uses both plain bearings and spherical bearings. Plain bearings are ideal for properly aligned systems that handle lower loads, where design, weight, and cost matter.

Spherical bearings are the preferred choice for applications exposed to heavy loads, angular movement, vibration, or shaft misalignment. When an application demands even greater load-carrying capacity, a spherical taper roller bearing may also be the right solution, depending on the operating conditions.

Engineers and buyers need to identify the right bearings to improve system reliability, extend equipment lifespan, and reduce downtime.

An experienced bearing manufacturer can also help a client select the right bearing for their specific application.

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