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Koyo (Koyo Seiko Co., Ltd.) was founded in 1921 and is a research and development-oriented integrated functional products manufacturing Japanese company with 6,557 employees. Koyo Seiko Co., Ltd. is one of the four major bearing manufacturing groups in Japan, with the world's most advanced production and control equipment; it has eight production plants in Japan, including Tokyo, Nara, Nitta, Toyohashi, Takamatsu, Tokushima, and Kameyama (all ISO9001 certified), and several overseas production bases and research institutes across Europe, Asia, North, and South America.


Japan Koyo Seiko Co., Ltd. produces tens of thousands of high-precision, high-quality Koyo bearing products, providing aerospace technology, computer components, motors, high-speed trains, metro trains, industrial machinery, CNC lathes, high-precision machining machines, automobile, locomotive industry, steel industry ... Koyo Bearing was founded in 1921 and had 8 factories and 28 points of sales in Japan and 9 production plants and 24 points of sales abroad. Koyo has a long history and culture, ranking third in Japan in the world of comprehensive bearing products manufacturers; its production of a variety of bearings widely used in general machinery and other industries and professional fields, in users around the world enjoy a high reputation and friendship quality praise. The business items of Nippon Koyo Seiko Co., Ltd. include bearings, automotive steering gears, automotive instrumentation, constant velocity universal joints, oil seals, work machines, industrial heat treatment furnaces, and electronic controllers. The company has significantly increased its overseas production capacity for automotive steering gears in recent years. It has steering gear production bases in Thailand, Malaysia, India, Korea, and China, making it the advanced Japanese and second largest manufacturer of automotive steering gear systems worldwide.

Types of Koyo Bearings

Koyo Angular Contact Ball Bearings are designed for high accuracy and high-speed performance and can carry axial and radial combined loads. A contact angle between the races and the balls is formed when the bearing is used. The major design characteristic of this type of bearing is that one or both of the ring races have one shoulder higher than the other. They can be one-directional thrust, double-directional thrust, double row, double row maximum capacity angular, duplex thrust, and four-point contact.

Koyo Deep Groove Ball Bearings are available in various sizes and are the most popular rolling element bearings. This bearing type supports radial and a certain degree of axial load in both directions. Shielded or sealed deep groove ball bearings simplify the sealing structure of applications and are used with a rotating inner ring. No greasing is necessary, as they are pre-lubricated. Bearings with a locating snap ring can be easily fit into the housing, as the locating snap ring facilitates axial positioning.

Koyo Tapered Roller Bearings consist of an inner ring (cone), an outer ring (cup), a cage, and rollers, which are profiled to distribute the load evenly. They have high radial and axial (thrust) load capacities at low to medium speeds and are available in single-row, two-row, and four-row designs.

Koyo Needle Roller Bearings are offered in a variety of inch and metric styles: Radial Needle Roller and Cage Assemblies; Drawn Cup Needle Roller Bearings; Drawn Cup Roller Clutches, Heavy-duty Needle Roller Bearings, Track Rollers; Thrust Bearings, Assemblies, Washers; Combined Needle Roller Bearings; Zero Clearance Ball and Needle Bearings for Steering Columns; Needle Rollers, Pins; Seals.

Koyo Spherical Roller Bearings are self-aligning and feature a large load rating capacity. They are suitable for low and medium-speed applications with heavy or impact loading. They have cylindrical or tapered bores and can be supplied with adapter assemblies and withdrawal sleeves.

Spherical roller bearings are unequaled in their capacity for high loads and tolerance to shock loads but have limited speed capabilities. They perform consistently under extreme conditions, such as application stress and marginal lubrication.

Koyo Cylindrical Roller Bearings feature thrust collars, parallel or tapered bores, and lubrication holes and grooves. They have high radial load capacity, as the rollers and raceway are in linear contact and are suitable for heavy radial and impact loading. Available as single, double, or four-row. They have cylindrically-shaped rollers that are crowned or end-relieved to reduce stress concentrations. This geometry results in low friction and allows high-speed applications.

Koyo Thrust Bearings are divided into single and double-direction types. Single-direction types can accommodate axial load in one direction, while double-direction types can accommodate it in both directions. They are not suitable for applications that involve radial load or high-speed rotation. Spherical thrust roller bearings are self-aligning and designed to carry high axial loads. They are also not suitable for high-speed rotation.

Koyo Special Environment Bearings (Ceramic/Exsev) operate optimally in extreme environments like clean rooms, vacuum, high temperatures, corrosive environments, and contaminating conditions. Ceramic bearings consist of rolling elements and rings made from ceramic and can be used in applications where conventional bearings are not suited. They are non-magnetic or insulating, highly heat resistant, and have a longer service life. Bearings made of stainless steel without rust preventive oil are suitable for operation in clean environments.

Features of Koyo Bearings

1、Koyo bearing adopts advanced design and manufacturing technology with high precision, speed, reliability, and durability, which can meet the needs of various industrial and automotive fields.

2、Koyo bearing adopts high-quality materials and lubricants, which have good anti-wear, anti-corrosion, anti-temperature change, and anti-pollution abilities and can adapt to harsh environmental conditions.

3、Koyo bearings adopt a strict quality control system, from the selection of raw materials, the process of processing, and the method of testing to the way of packaging, all following high standards and norms to ensure that each product achieves the best performance and condition.

4、Koyo bearings provide a wide range of types and specifications, including deep groove ball bearings, tapered roller bearings, thrust ball bearings, angular contact ball bearings, self-aligning roller bearings, etc., which can meet different structures, load, speed, and mounting requirements.

5、Koyo bearing provides perfect after-sales service and technical support through professional technicians, equipment, and a network to provide customers with timely, effective, and attentive solutions to protect the interests and satisfaction of customers.

Since 2015, TFL bearings have been recognized by domestic and international customers as a high-quality alternative to Koyo bearings. With a commitment to precision manufacturing and rigorous quality control processes, TFL bearings have proven reliable and efficient in various industrial applications. We offer performance and durability comparable to Koyo bearings, meeting international standards and using advanced technology and materials. Rigorous testing ensures their reliability regarding load capacity, speed capability, temperature resistance, and corrosion resistance. A key advantage of TFL bearings is their competitive price without compromising quality, making them an attractive alternative to the more expensive Koyo bearings. We can offer a full range of bearings to meet the needs of different customers.