ROTEK Bearings

Company Background

Rotek Incorporated, founded in 1962 and headquartered in Aurora, Ohio (USA), is a manufacturer of slewing bearings and slewing rings, and a ThyssenKrupp AG company. Rotek is part of the ThyssenKrupp Rothe Erde group and is recognized as the North American leading manufacturer of slewing bearings, including ball and roller slewing bearings and wire-race slewing bearings, as well as a market leader for seamless forged steel and non-ferrous metal rings.

Product Range

Rotek manufactures ball and roller type slewing bearings in single-row and multi-row designs, with internal or external gearing or gearless, in diameters ranging from 12 inches to 50 feet, across a wide range of capacities, materials, and seal types. Their full slewing bearing line includes the Series 1000 Turntable Bearings, Series 2100 Light Duty, Series 3000 Single Row Ball, Series 4000 Double Row Ball, Series 5000 Cross Roller, Series 6000 High Speed, Series 10000 Three Row Roller, Series 12000 Roller/Ball Combination, and Series 15000 Wire Race. 

Applications

Rotek slewing bearings and forged rings are used as structural and connection elements in mechanical engineering, harbor cranes, ship deck cranes, truck cranes, construction cranes, excavators, antenna systems, offshore technology, rail vehicles, telescopes, tunneling machines, wind energy turbines, underwater turbines, and solar energy plants.

Engineering Support

Rotek offers design assistance at no charge to help with slewing bearing specification, with a team of application and design engineers who can perform preliminary design evaluations based on specific application requirements. Many slewing bearings are available from stock or on short lead times, and the company also provides after-sales services including slewing bearing repair and on-site inspection.

Lily Bearing offers a comprehensive range of ROTEK slewing bearings across the following series:

Four Point Contact Ball Slewing Ring Bearing

Single-row ball bearings available in flanged and non-flanged designs, offered with internal gear, external gear, or no-gear configurations. This is the most common slewing ring type, suited for moderate load and moment capacity applications.

Eight Point Contact Ball Slewing Ring Bearing

Double-row ball bearings that provide higher load and moment capacity than single-row designs, also available with internal gear, external gear, or no-gear options — ideal for equipment subject to greater combined loading.

Cross Roller Slewing Ring Bearing

Single-row roller bearings featuring crossed cylindrical rollers arranged at 90° to each other, delivering high rigidity and load capacity in a compact cross-section. Available with internal gear, external gear, or no-gear configurations.

Three-Row Cross Roller Slewing Ring Bearing

A heavy-duty design with three separate roller raceways, offering the highest load, moment, and stiffness capacity among ROTEK's slewing ring offerings. Also available with internal gear, external gear, or no-gear options — commonly used in large-scale cranes and heavy machinery.

Slewing Rings Developed for Transport Vehicles

Single-row ball bearings without gear structure, engineered specifically for vehicle-mounted rotating platforms and transport equipment applications.

Thrust Ball Slewing Rings

Single-row ball bearings without gear structure, designed primarily to handle axial (thrust) loads in rotating assemblies.