A clear overview of the main industrial bearing types — ball, roller, thrust, and more — and what makes each valuable on the surplus market.
Ball Bearings and Roller Bearings
Industrial bearings come in many types, each engineered for specific loads, speeds, and applications. Understanding the main categories helps you recognize what you have and appreciate its value on the surplus market. The two broadest families are ball bearings and roller bearings, distinguished by the shape of their rolling elements.
Ball bearings use spherical balls and excel at high speeds with moderate loads. Deep groove ball bearings are the most common type, found in countless machines. Angular contact ball bearings handle combined radial and axial loads and are common in precision applications. Roller bearings use cylindrical, tapered, spherical, or needle-shaped rollers and carry heavier loads than ball bearings of similar size, making them essential in heavy industry.
Specialized Roller and Thrust Bearings
Tapered roller bearings handle both radial and axial loads and are ubiquitous in automotive wheel hubs, gearboxes, and heavy machinery — Timken is the iconic brand here. Spherical roller bearings tolerate misalignment and carry very heavy loads, making them popular in mining, construction, and material handling. Cylindrical roller bearings excel at high radial loads and high speeds, while needle roller bearings pack high load capacity into a compact space, ideal where radial space is limited.
Thrust bearings are designed specifically to handle axial (thrust) loads rather than radial loads, and come in both ball and roller varieties. Each of these specialized types retains strong surplus value when in good condition, particularly from premium brands.
Mounted and Linear Bearings
Beyond the rolling-element categories, mounted bearing units like pillow block and flange bearings combine a bearing insert with a housing for easy installation on machinery frames. These are extremely common in conveyors, fans, and agricultural equipment. Linear bearings, by contrast, facilitate straight-line motion rather than rotation and are used in automation and precision positioning systems.
All of these bearing types — from common deep groove ball bearings to specialized linear systems — are purchased by surplus bearing buyers. Knowing what you have helps you describe your inventory accurately and recover its full value.
If you have surplus bearings to sell, contact Bearing Buyers for a free, no-obligation cash quote. We buy new and used bearings of every major brand in all 50 states, pay top dollar, and cover all pickup and shipping costs.