Adjustment of NSK Bearing Clearance
Adjustment of NSK Bearing Clearance
Cause Detection and Analysis of Excitation in the Use of Koyo Bearing
Cause Detection and Analysis of Excitation in the Use of Koyo Bearing

The Structural Type of Koyo Bearing has Different Requirements for Maintenance

The Structural Type of Koyo Bearing has Different Requirements for Maintenance

  • 1. Thrust angular contact ball bearing in bearing
  • The contact angle of thrust angular contact ball bearing is generally 60 °.
  • The commonly used thrust angular contact ball bearing is generally a two-way thrust angular contact ball bearing, which is mainly used for the spindle of precision machine tools. It is generally used together with double row cylindrical roller bearing, and can bear two-way axial load. It has the advantages of high precision, good rigidity, low temperature rise, high speed, convenient assembly and disassembly, etc.The Structural Type of Koyo Bearing has Different Requirements for Maintenance
  • 2. Deep groove ball bearing in bearing
  • Structurally, each ring of deep groove ball bearing has a continuous groove raceway with a cross section of about one-third of the circumference of the equatorial circle of the ball. Deep groove ball bearing is mainly used to bear radial load and certain axial load.The Structural Type of Koyo Bearing has Different Requirements for Maintenance
  • When the radial clearance of Koyo bearing increases, it has the property of angular contact ball bearing and can bear the alternating axial load in two directions. Compared with other types of bearings with the same size, this kind of bearing has small friction coefficient, high limit speed and high precision. It is the preferred bearing type for user selection.The Structural Type of Koyo Bearing has Different Requirements for Maintenance.The Structural Type of Koyo Bearing has Different Requirements for Maintenance
  • Deep groove ball bearing has the advantages of simple structure and convenient use. It is a kind of bearing with large production volume and wide application range.
  • 3. Thrust tapered roller bearing in bearing
  • Because the rolling element in the thrust tapered roller bearing is a tapered roller, the rolling bus and the raceway bus of the washer meet at a certain point on the axis line of the bearing in structure, so the rolling surface can form pure rolling, and the limit speed is higher than that of the thrust cylindrical roller bearing. Features: thrust tapered roller bearing can bear unidirectional axial load. The type code of thrust tapered roller bearing is 90000.
  • 4. Structure and performance characteristics of double row tapered roller bearing in bearing
  • There are many structures of double row tapered roller bearings, a large number of which are 35000 type. There is a double raceway outer ring and two inner rings. There is a spacer between the two inner rings. The clearance can be adjusted by changing the thickness of the spacer. The Structural Type of Koyo Bearing has Different Requirements for Maintenance
  • This kind of bearing can bear both radial load and bidirectional axial load, and can limit the axial displacement of shaft and shell within the range of axial clearance of bearing. Structural characteristics of tapered roller bearing. The type code of tapered roller bearing is 30000, and the tapered roller bearing is a separate bearing. 
  • Tapered roller bearings are mainly used to bear the combined radial and axial load dominated by radial load. Compared with angular contact ball bearing, the bearing capacity is large and the limit speed is low. Tapered roller bearing can bear axial load in one direction and limit axial displacement of shaft or shell in one direction.
  • The Structural Type of Koyo Bearing has Different Requirements for Maintenance
  • In order to give full play to Koyo bearing and maintain its due performance for a long time, regular maintenance (regular inspection) must be carried out.The Structural Type of Koyo Bearing has Different Requirements for Maintenance
The Structural Type of Koyo Bearing has Different Requirements for Maintenance
  • Through proper regular inspection, it is very important to find faults early and prevent accidents before they happen, which is very important to improve productivity and economy.The Structural Type of Koyo Bearing has Different Requirements for Maintenance
  • 1. Cleaning
  • When removing the bearing for inspection, first make appearance records by photography and other methods. In addition, confirm the amount of remaining lubricant and sample the lubricant before cleaning the bearing.The Structural Type of Koyo Bearing has Different Requirements for Maintenance
  • a. The cleaning of bearings is divided into rough cleaning and fine cleaning, and a metal grid can be placed at the bottom of the container.
  • b. During rough cleaning, use a brush to remove grease or adhesion in the oil. At this time, if the bearing is rotated in oil, pay attention to the damage to the rolling surface due to foreign matters.
  • c. During fine cleaning, rotate the bearing slowly in oil and carry out it carefully.
  • The commonly used cleaning agent is neutral water-free diesel oil or kerosene, and sometimes warm lye is used as needed. No matter what kind of cleaning agent you use, always filter it and keep it clean.
  • After cleaning, apply antirust oil or antirust grease on the bearing immediately.
  • 2. Inspection and judgment
  • In order to judge whether the removed Koyo bearing can be reused, its dimensional accuracy, rotation accuracy, internal clearance, mating surface, raceway surface, cage and sealing ring should be emphatically checked.
  • The inspection results can be judged by those who use inertial bearings or are proficient in bearings.
  • The judgment criteria vary according to mechanical properties, importance and inspection cycle. In case of the following damage, the bearing shall not be reused and must be replaced.
  • 1) Fracture and defect of bearing parts.
  • 2) Stripping of the rolling surface of the raceway surface.
  • Fault identification method of Koyo bearing
  • Without disassembly and inspection, it is very important to identify or predict whether the bearing is faulty in operation, which is very important to improve productivity and economy.
  • The main identification methods are as follows:
  • 1) Recognition by sound
  • Recognition by sound requires a wealth of experience. Must be adequately trained to recognize bearing and non bearing sounds. Therefore, special personnel should be assigned to carry out this work as far as possible. The sound of the bearing can be clearly heard by sticking the listener or listening stick to the shell.
  • 2) Identification by operating temperature
  • This method is a comparative identification method, which is only used in the situation where the running state does not change much. For this purpose, continuous temperature recording must be carried out. In case of failure, not only the temperature rises, but also irregular changes occur.
  • 3) Identification by lubricant status
  • The lubricant shall be sampled and analyzed to judge whether its turbidity is mixed with foreign matters or metal powder. This method is particularly effective for Koyo bearings or large bearings that cannot be observed close.
Technical requirements for Timken non-standard bearing

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.

Chat with us
Chat with us
Questions, doubts, issues? We're here to help you!
None of our operators are available at the moment. Please, try again later.
Our operators are busy. Please try again later
Have you got question? Write to us!
This chat session has ended
Was this conversation useful? Vote this chat session.
Good Bad

Request A Quote Today