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This section provides an overview for slewing bearings as well as their applications and principles. Also, please take a look at the list of 14 slewing bearing manufacturers and their company rankings. Here are the top-ranked slewing bearing companies as of February, 2025: 1.Triangle Manufacturing Company, 2.Xuzhou Wanda Slewing Bearing Co.,Ltd., 3.igus, inc..
Table of Contents
Slewing bearings are bearings used in the operating parts of construction and civil engineering machinery, especially those parts that operate in a slewing motion.
They are widely used because they have the standard form of a single-row ball bearing and are relatively easy to handle. Slewing bearings have a structure that can simultaneously support single loads and composite loads with respect to moments and other loads.
The moment is the sum of the loads applied to the bearing vertically by the thrust, horizontally by the radial, and the distance between the center of the bearing axis and each point of action of the thrust and radial loads, which are added up to the respective loads.
Slewing bearings are characterized by their high load-carrying capacity. Slewing bearings allow for lower friction in the slewing motion, thus extending the service life of the bearing in practical use.
Slewing bearings are widely used as bearings in the slewing sections of large machines because they can support combined loads and sustain large loads.
Specific examples of applications are as follows
The internal structure of a skewing bearing is the same as that of a standard ball bearing. There is an arc of the inner and outer ring raceways, and the balls are uniformly arranged in a single row inside the arc.
This makes it possible to use even large ball diameters and to design a bearing that is structurally compact but can carry a large load. By machining and mounting gears directly on the inner or outer rings, driven slewing is possible, and the slewing section can be simplified and made lighter.
However, the size of the thrust load that can be supported depends on the size of the balls that are the rolling elements of the bearing. The size of the balls must be determined by calculating the diameter of the balls that is sufficient for the size of the load that needs to be applied.
Slewing bearings are widely used in construction machinery. Slewing bearings enable smooth slewing operation of heavy structures such as power shovels and cranes. The same is true for small cranes used in residential areas.
Slewing bearings are fastened between the upper slewing body and the lower structure with a large number of bolts. As for maintenance, regular greasing of the slewing bearing is necessary. If the grease is depleted, the slewing bearing area will generate abnormal noise and the sliding during slewing will be faulty, making it impossible to perform fine operations.
Resistance during slewing can cause twisting of the entire machine, so regular greasing is essential. As maintenance other than greasing, inspect the slewing bearing fastening bolts on construction machinery for loosening or elongation of the fastening bolts, as these bolts are subjected to large forces during operation.
Continued use of a slewing bearing with loose or stretched fastening bolts could, in the worst case, result in rupture of the fastening bolts or rupture of the slewing bearing, causing a serious accident. To prevent this from happening, it is important to inspect the bolts periodically.
Repairing slewing bearings is a time-consuming and expensive process, depending on the size and the area of use. If the machine is a heavy construction machine, the slewing bearing is located between the upper slewing body and the lower structure, so the upper slewing body must be removed using an overhead crane.
This process is time-consuming and requires workers who are skilled and knowledgeable about the product. Slewing bearings can be prevented from failure through proper product handling and maintenance.
*Including some distributors, etc.
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Kaydon Bearings is a manufacturer of slewing ring bearings and thin section bearings that is headquartered in Ann Arbor, Michigan and was founded in 1941. The company offers thin section, slewing ring bearings, and Cooper split roller bearings. Kaydon custom balls, rings, and seals tools, are the products of specialty by Kaydon. The Reali-Slim section bearings cater to the aerospace, robotics, semiconductor, industrial machinery and medical devices and machine industry. On the other hand, Slewing ring bearings cater to industrial machinery and automation, food processing, heavy equipment, mining, and construction and utility vehicles.
Triangle Manufacturing Company, established in 1922, based in Oshkosh, Wisconsin, manufactures stamped and fabricated motion components and assemblies to meet the needs of equipment manufacturers. The company’s product portfolio includes bearings, linkages, rod ends, Lazy Susan turntable bearings, and motor mounts. Their team of engineers help design the products from quoting to prototyping and manufacturing to on-time delivery. The company’s services provided will assist customers in creating ideal solutions to improve products and increase efficiency.
igus, Inc., established in 1964 and headquartered in Cologne, Germany, is a manufacturer and distributor of complex technical polymer components. The company offers a range of products including plastic plain bearings, flexible cables, and energy chains. Additionally, it also provides connectors, robotic components, and 3D-printed products. These products find applications in various areas such as automation and robotics, automotive, and gaming. It is ISO 9001:2015 certified and has been awarded with the “NRW - Economy in Transition” competition award and the Rhineland Business Prize in the “Sustainability” category.
Potesta & Company LCC, established in 2012 with headquarters in the USA, is a manufacturer and distributor of slewing rings, drives, and gears. The company's product line includes single, double, or triple row bearing slewing rings, slew drives designed to handle radial or axial loads using high rotational torque, and slewing gears made from a wide range of materials, and its capabilities include milling, drilling, turning, and broaching. The company caters to clients in manufacturing and related industries, and it also offers a full custom product service that includes design, engineering, and production to meet client-specific requirements.
TPA Motion was started in 2002 and based in Fort Mill, South Carolina. TPA Motion is now part of the Acuvi AB group of companies. Acuvi is a Swedish Technology company focusing on developing compact drive solutions for life science, medical, and industrial applications. TPA Motion is an ISO 9001:2015 certified manufacturer and distributor of motion and precision assemblies. TPA Motion has 2 main product segments, component products and engineered OEM solutions. Component products include rails, actuators, bearings, guides, and assemblies. Engineered OEM solutions include microplate robots, curved rail systems, special telescopic slides, and high temperature systems.
Isotech was founded in 182 and is headquartered in Hatfield, Pennsylvania. Isotech is a manufacturer’s representative and distributor of proprietary mechanical and electromechanical products to the industrial, medical, and military OEM and in-plant markets. Some of Isotech’s products include linear slide assemblies & rail sets, shock/vibration mounts & pads, linear bushings & shafting, telescoping lifting columns, positioning stages, air bearings, gas springs/air cylinders, motorized positioning tables, laser marking cutting systems, foamed aluminum/metal/composites, stamped metal, noise control products, and belt driven actuators.
VXB Ball Bearings., founded in the USA is a supplier of bearings. The company's product portfolio consists of a variety of ball bearings, including deep groove ball bearings, angular contact ball bearings, thrust ball bearings, cylindrical roller bearings, tapered roller bearings, and spherical roller bearings. It also provides specialized bearings for specific industries and applications, such as agricultural bearings, automotive bearings, and medical equipment bearings. The company offers services including delivery, technical assistance, and after-sales support.
Emerson Bearing is based in Boston, Massachusetts and serves both domestic and international customers of industries ranging from mining to machine tools to power generation to wood products to wastewater treatment to robotics and more with bearings and casters. Emerson Bearing’s product list includes adhesives, sealants, ball bearing, roller bearing, mounted nut bearings, linear motion bearings, rod ends, belts, sheaves, chains, sprockets, couplings, clutches, brakes, locknuts, washers, lubricants, pullers, tools, retaining rings, seals, and shaft collars.
W.C. DuComb Company was founded in 1915 in Detroit, Michigan, where it still operates. W.C. DuComb Company is a stocking distributor of bearings, popwer transmission, and. Linear motion products, electric motors, and VS drives. W.C. DuComb Company serves industries such as conveyor and machinery OEMs, industrial processors, machine rebuilders, wastewater, sand & gravel, tool & die, steel, metals, and scrap. W.C. DuComb Company product offering lines include accessories, bearings, belts, belting, electrical, linear motion, lubricants & sealants, power transmission, and sealing solutions.
SKF UK is the British division of SKF, originally founded in 1907 and headquartered in Gothenburg, Sweden. SKF designs, develops, and manufacturers bearings, seals, lubrication systems, and services worldwide, with industrial and automotive segments, providing solutions for industries including aerospace, agriculture, transportation, food and beverage, general machinery, material handling, mining, energy, paper, and wind energy. SKF UK offers rolling bearings, mounted bearings, automotive seals, lubrication management, vehicle aftermarket services, waste electric products, and electronic equipment products as well as services including maintenance, remanufacturing, customization, and training.
Xuzhou Wanda Slewing Bearing Co., Ltd., established in 2011 with headquarters in China, is a manufacturer of slewing bearings and slewing drives. The company's product line includes light slewing bearings, flange slewing bearings, single row ball slewing bearings, slew drives for solar trackers, and worm gear slew drives, used in the mining machinery, welding machinery, construction vehicles, modular vehicles, and solar tracking systems markets. The company has a manufacturing facility of over 10,000 square meters and also offers a custom-production service to meet client-specific requirements.
igus GmbH, established in 1964 and based in Cologne, Germany, is a manufacturer and distributor of technical products made using polymers for movement. Its products include injection molding frames, motor control systems, and plain bearings, and it has over 240,000 products in over 1,000,000 variations. It serves 188,000 companies from over 80 countries worldwide in 50 different industries, including packaging, automotive, and renewable energy. The company is ISO 9001, ISO 14001, and ISO 50001 certified, and in 2023, it recorded €1.115 billion in sales. Since 2021, the company has purchased 380 new injection-molding machines and has replaced 275 old ones.
Rotek Incorporated, a ThyssenKrupp AG company established in 1962 with headquarters in the USA, is a manufacturer of slewing bearings and slewing rings. The company's product line includes light-duty slewing bearings, single-row ball slewing bearings, double-row ball slewing bearings, and seamless forged rings made of high-alloyed steel and non-ferrous metals. Its products are used in mechanical engineering, in harbor cranes, ship deck cranes, truck cranes, and construction cranes, among many other applications.
MiMotion was founded in 1946 in Birmingham, Alabama and today operates under Genuine Parts Company. The company operates as a distributor and supplier of custom parts for both maintenance repair and operating replacement part market and the OEM market. The company’s product line includes many types of products including abrasives, chemicals & lubricants, hand & power tools, hose & fittings, and process pumps & equipment. The company also provides maintenance repair and operating replacement parts as well as OEM parts ensuring compatibility with existing customer operations.
Ranking as of February 2025
Derivation Method| Rank | Company | Click Share |
|---|---|---|
| 1 | Triangle Manufacturing Company |
11.2%
|
| 2 | Xuzhou Wanda Slewing Bearing Co.,Ltd. |
11.2%
|
| 3 | igus, inc. |
9.0%
|
| 4 | Kaydon |
8.6%
|
| 5 | Potesta & Company, LLC. |
8.2%
|
| 6 | TPA Motion, LLC |
7.1%
|
| 7 | Rotek, Inc. |
6.7%
|
| 8 | Motion Industries, Inc. |
6.7%
|
| 9 | Isotech, Inc. |
6.7%
|
| 10 | Emerson Bearing |
6.0%
|
Derivation Method
The ranking is calculated based on the click share within the slewing bearing page as of February 2025. Click share is defined as the total number of clicks for all companies during the period divided by the number of clicks for each company.Number of Employees
Newly Established Company
Company with a History
*Including some distributors, etc.
*Including some distributors, etc.
| Country | Number of Companies | Share (%) |
|---|---|---|
|
United States of America
|
9 | 81.8% |
|
Sweden
|
1 | 9.1% |
|
China
|
1 | 9.1% |
182 products found - Page 2
182 products - Page 2
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