Examples of KOYO bearing damage and its causes and countermeasures, please use them as data for inferring the cause of bearing damage. Damage status: When KOYO bearings are subjected to load and rotate, the raceway surface or rolling element surface of the inner ring and outer ring will show scales due to rolling fatigue Like peeling phenomenon. Original cause: too much load. Poor installation (non-linearity) moment load foreign matter intrusion and water ingress. Poor lubrication, improper lubricant, improper bearing clearance. The accuracy of the bearing box is not good, and the uneven rigidity of the KOYO bearing box has a large deflection caused by rust, corrosion points, scratches and pressure. Measures: Check the size of the load and re-study the KOYO bearing used to improve the installation method, improve the sealing device, and prevent rust during shutdown. Use lubricants of appropriate viscosity and improve lubrication methods. Check the accuracy of the shaft and bearing housing. Check the clearance.

    Damage status: A dark surface with slight abrasion appears. There are many tiny cracks from the surface to the inside of the dark surface with a depth of 5-10m, and small peeling (micro-peeling) occurs in a large area. Reason: The lubricant is not suitable . Foreign matter has entered the lubricant. Poor lubricant causes rough surface. The surface finish of the mating rolling parts is not good. Measures: Choose a lubricant to improve the sealing device to improve the surface finish of the matched rolling parts

    Damage status: The so-called seizure is the surface damage caused by the small burns on the part of the sliding surface. Linear flaws in the circumferential direction of the slideway and rolling surfaces. The cycloidal scar on the roller end surface is close to the jam on the collar surface of the roller end surface. Original cause: excessive load, excessive preload. Poor lubrication. Foreign body bites. Tilt of inner ring and outer ring, deflection of shaft. The accuracy of the shaft and KOYO bearing box is poor. Action: Check the size of the load. The preload should be appropriate. Improve lubricants and lubrication methods. Check the accuracy of the shaft and KOYO bearing box. Foreign body intrusion, development caused by rust and electric corrosion. Poor lubrication. The slipping measures caused by the irregular movement of the rolling elements: improve the sealing device. Clean the KOYO bearing box. Adequate filtering and lubrication \requirement is usually to clean the processing fluid and make the final anti-rust, usually 1-3 years. Therefore, the requirements for cleaning and rust prevention are higher. For customers who use spray equipment, the number of liquid storage tanks usually reaches 3 or more. Add low-foaming KOYO bearing cleaning agent in the cleaning tank according to the specified ratio, and add water-based rust inhibitor to the rinse tank for rinsing. After the above steps are completed, soak the product in anti-rust oil for anti-rust, and finally carry out anti-rust packaging. For customers who use ultrasonic equipment.
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    1. Scratch damage phenomenon: several deep scratches are found on the working surface along the direction of rotation. The damage mechanism is that large particles of hard foreign particles mechanically scratch the alloy surface. The reason is: invaded in the lubrication gap of KOYO bearing Hard foreign particles are mainly brought in by lubricating oil or mixed in due to poor cleaning during assembly.

    2. Scratch damage phenomenon: local areas of the work surface become hairy, and a fine nick is drawn along the direction of rotation, with a clear termination boundary: damage mechanism: the sliding surface is uneven or small hard foreign objects in the local area along the sliding direction Scratch the work surface, this area is usually the thinnest part of the oil film; the main cause is poor oil filtration.

    3. Abrasive wear and damage phenomenon: the main bearing area of ​​the working surface shows a large area of ​​fine scratches along the rotation direction. The SKFKOYO bearing gap is enlarged, and the damaged area sometimes shows a bright polished surface; damage mechanism: the oil contains fine impurities, like Abrasive particles slowly wear the surface; the main cause is poor quality of the filter, too large particles allowed to pass through, or contamination of the lubricating oil.

    4. Erosion and wear damage: There are scouring wear marks on the edges of oil holes and oil grooves; damage mechanism: high-speed flowing lubricating oil contains abrasive particles, eroding the alloy surface and causing damage; the cause is poor lubricating oil filtration quality. The flow channel design is unreasonable, causing the lubrication flow rate to be too high.

    5. Mixed friction and wear damage phenomenon: the local area of the bearing working surface shows relatively smooth wear marks, and the KOYO bearing gap is enlarged; damage mechanism: the oil film in this area is thin, and it is in a state of mixed friction for a long time, causing fusion wear in this part; Causes: ①The bearing capacity of the oil film is not enough, and the film thickness is too thin; ②The diesel engine is overloaded for a long time; ③The diesel engine often starts and stops.