KOYO Bearing

Koyo Bearing is a Japanese company Koyo Seiko Co., Ltd., which manufactures and develops comprehensive functional products. It was established in 1921 and its full name is Koyo Seiko Co., Ltd., one of the four largest bearing production groups in Japan. Whether your application needs are automotive OEM, automotive and heavy-duty aftermarket, industrial OE or industrial aftermarket, Koyo can meet your bearing requirements. Koyo provides a full range of spherical roller bearings for the steel industry, in addition to radial and angular contact balls, including precision machine tool bearings and cylindrical roller bearings. Koyo bearings are one of the most well-known brands in bearings, and the manufactured products are suitable for almost any application that relies on needle roller bearings.

Product Catalog of KOYO

KOYO  Self-aligning Ball Bearing

KOYO  Thrust Roller Bearing

KOYO  Pillow Block Bearings

KOYO  Needle Roller Bearing

KOYO  Tapered Roller Bearings

KOYO  Angular Contact Ball Bearing

KOYO  Cylinder Roller Bearing

KOYO  Thrust Ball Bearing

More Bearings

KOYO  Spherical Roller Bearing

KOYO Deep Groove Ball Bearings

Product Description of KOYO Bearing

Application of KOYO Bearing

  • Application-Metallurgical Equipment
    There are many types of metallurgical equipment, not only the equipment required by the raw material plant, but also the equipment required from the upstream process to the downstream process such as the steelmaking process, the rolling process, and the leveling process.
  • These devices are equipped with various bearings. These bearings are used under the unique “iron powder”, “water” and “hot” conditions of metallurgical equipment.
  • They must also meet the conditions of “heavy load + vibration and shock”, “from ultra-low speed to high speed + rapid acceleration and deceleration”, etc.
  •  Use under harsh conditions. “Stable operation, improve production efficiency” can be described as a representative industry proposition in the field of metallurgical equipment.
  • KOYO takes this proposition as its goal. Not only to advance the bearing design technology, but also from the inherent angle of bearing material technology, lubrication technology, analysis technology, etc., advance corresponding measures and research and development work every day.
  • For this reason, KOYO has been committed to solving the permanent problem of “long bearing life and high reliability” for a long time. KOYO has a strong lineup of bearings for various metallurgical equipment, with products ranging from ISO standard bearings to uniquely developed high-performance bearings.
  • In addition, we have also taken measures to provide new solutions to the recent demand for high value-added products and environmentally friendly products in the metallurgical industry.


Motor field

Motor field

Medical equipment

Medical equipment

Wind power

Wind power





Shipping & Package of KOYO Bearing

Shipping port: Qingdao/Tianjin
Supply Ability: 100,000 pieces per month

  1. Plastic bag + single box + carton + plywood pallet
  2. Neutral industrial packaging + neutral carton packaging + pallet
  3. According to customer requirements

Why choose us

  1. Sample requirements: Contact us via email or trade manager, we will send samples according to your requirements.
  2.  World-class bearings: We provide customers with world-class quality domestically produced bearings.
  3. OEM or non-support bearings: As we have a wealth of knowledge and connections in the industry, we can easily meet any requirements for non-standard bearings.
  4. Outstanding quality of genuine products: The company has been proving that it provides 100% quality products with genuine intentions.
  5.  After-sales service and technical assistance: The company provides after-sales service and technical assistance according to customer requirements and needs.
  6. Fast delivery: The company provides on-time delivery through its streamlined supply chain.
  7.  Cost-saving: We provide long-life, anti-vibration, high-reliability bearings with high quality and better performance. This increases cost savings.
  8.  Answer customers’ questions in time: We believe that if customers are satisfied, it proves our value.
    Customers always get fast support.

Hot Products



Due to their internal design, ball bearings cannot usually be disassembled down to the component level; therefore, they cannot usually be refurbished.

Solid base shells are manufactured without cavities and fillers; they are stronger than hollow bases, and there are no traps for bacteria and fungi to grow. In the thermoplastic shell, the sturdy base will not break under steam or high-pressure washing. The hollow base saves material and weight to reduce costs. Some people use epoxy resin to backfill the hollow base to eliminate the trap of bacteria breeding, but this will not increase the strength, will cause the installation surface to be uneven, and water will seep between the shell and the filling material, causing cracking.

Use particularly thermally stable bearing rings, larger internal clearance (C4), specially selected lubricants that will not decompose at high temperatures, and zinc anodized flinger. There are two basic versions of our high temperature bearings. The suffix “C4HR5” represents the bearing that can withstand 400°F, and the suffix “C4HR23” represents the bearing that can withstand 450°F.

For critical applications such as pulp and paper processing, printing and packaging, material tearing can cause expensive downtime due to excessive torque and vibration.

The two biggest factors affecting the starting and running torque of the bearing are the seal design and lubricant selection. The shaft and bearing seat fit, component accuracy and surface finish, and retainer design also have some influence.

In higher speed applications, non-contact sealing devices are usually required to minimize operating torque and heat generation, so oil baffle rings and secondary sealing devices are usually required. Flowing oil lubrication systems are usually the best solution.

After proper installation, most seated bearings only need to be relubricated regularly with a small amount of grease and checked to ensure that they operate at low temperatures, quietness, and sufficient accuracy.

This depends on many factors, such as the application’s load conditions, operating speed, duty cycle, temperature, and operating environment. The technical information section of this website provides some basic information. Our engineers can help you determine more specific theoretical life calculations.

When noise and/or operating temperature increase or operating accuracy decreases, bearings should be replaced.

Lubricant of choice
Lubrication joint type or location
Sealing materials and design options
Dimensions, suitable for housing or insert
Fixing screw options
Paint the shell in any color

Too little or too much lubricant
Incorrect lubricant type
Poor bearing installation
Improper internal clearance
Excessive load and/or speed
Extreme temperature
Movement between mounting surfaces

The noise emitted by the bearing may be caused by a combination of one or more factors, such as insufficient working clearance, excessive working clearance, changes in working clearance due to temperature, damage to the contact area, contamination, inappropriate lubricants or The raceway is damaged.

Lubricants have five basic functions for bearings:

Reduce friction
Reduce wear
Reduce temperature rise
Minimize corrosion
Seal contaminants

We do not recommend mixing grease. Mixing incompatible greases will cause the mixture to harden, preventing it from releasing any oil. Mixing incompatible greases can also soften the mixture, which releases all the oil. In either case, the mixture will not be able to properly lubricate the bearing. We strongly recommend using the same type of grease originally provided with the bearing.

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