IKO machine spindle bearings need to pay attention to the problem of using grease

In order to better play the best situation, the choice of IKO bearing is directly related to the stable operation of the equipment. The choice of machine tool spindle bearing grease must be considered from the following aspects:

1. The rust inhibitor is preferably insoluble in water. Grease should have good adhesion, and the grease used in the spindle bearing of the machine tool must have anti-rust effect. And can form a layer of oil film on the steel surface.

2. Lead to leakage. In normal operation, the grease will become soft during machining. The grease will be removed from the IKO bearing. If the mechanical stability of the grease is insufficient, during the operation, the structure of the soap of the grease will mechanically disintegrate, causing the grease to be destroyed, thereby losing the lubricating effect.

3. During the operation of the bearing, the oil seal is a necessary barrier to maintain the machine shaft bearings and lubricants from external contamination. No matter whether debris or moisture can penetrate into the IKO bearing to prevent damage. Proper device maintenance is an important factor in maximizing the service life of bearings. At the same time, it is necessary to pay attention to the cleanliness of the bearing, the correctness of the bearing selection and the selection of appropriate equipment and maintenance tools. In addition, the bearings must be protected from contaminants and moisture and ensure proper installation and lubrication. Therefore, the design of the bearing arrangement, the condition of the oil seal, the type of lubricant and the lubrication cycle, and even the special support play the same and important role.

Of course, if the operating speed of the imported bearings is very low and it is necessary to work in a polluted and humid environment, it is best to fill the IKO housing with grease.

Especially in applications where the vertical axis or axis is tilted at an angle. The grease also has a sealing function to prevent the influence of contaminants, moisture or moisture on the bearing. However, if the grease is excessive, it will cause the working temperature of the spindle of the machine tool to rise, especially in high-speed applications. In most cases, the bearing can be completely filled with grease only at the beginning, while only a proper amount of grease is filled in the housing and there is some free space. Before the full operating speed is reached, the excess grease must be drained out of the IKO bearing during the run-in phase, leaving an appropriate amount of grease in the bearing. When the operating temperature drops significantly, it means that the grease has run into the bearing and is evenly distributed in the bearing arrangement.

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Industrial IKO overall eccentric bearing maintenance precautions

In order to maintain the original performance of IKO bearings in good condition for as long as possible, maintenance, overhaul, and accident prevention are required to ensure the reliability of operation and improve productivity and economy. Maintenance is best carried out on a regular basis in accordance with the operating standards for the mechanical operating conditions. The content includes monitoring of operating conditions, replenishment or replacement of lubricants, and periodic disassembly inspections. As a maintenance item in operation, there are rotation sound, vibration, temperature, and state of lubricant of the entire eccentric bearing.

Cleaning of the bearing: When disassembling the lower bearing for inspection, first record the appearance of the bearing, confirm the residual amount of the lubricant, and then wash the bearing after sampling the lubricant for inspection. As a cleaning agent, gasoline and kerosene are commonly used.

The cleaning of the removed bearings is divided into coarse cleaning and fine cleaning. They are placed in the container respectively, and the metal mesh bottom is placed first so that the bearing does not directly contact the container. When rough cleaning, if the IKO bearing is rotated with dirt, it will damage the rolling surface of the bearing and should be noted. In the rough cleaning oil, use a brush to remove the adhering and adhering substances. After they are almost clean, they are transferred to the fine washing.

Fine washing is to carefully clean the bearing while rotating it in the cleaning oil. In addition, the cleaning oil should always be kept clean.

Bearing inspection and judgment: In order to judge whether the removed bearing can be used, it should be checked after the bearing is cleaned. Check the condition of the raceway surface, the rolling surface, the mating surface, the wear of the cage, the increase of the overall eccentric bearing clearance, and the damage and abnormality that are irrelevant in dimensional accuracy. For non-separable miniature ball bearings, use one hand to support the inner ring horizontally and rotate the outer ring to check if it is smooth.

High temperatures often indicate that the bearing is in an abnormal condition. High temperature is also harmful to the lubricant in the IKO bearing. Sometimes the bearing overheating can be attributed to the lubricant of the outer spherical bearing. If the bearing is operated for longer than 125 degrees Celsius, the bearing life will be reduced. Causes of high temperature bearings include: insufficient lubrication or excessive lubrication, the magazine contains the magazine, the load is too large, the overall eccentric bearing is damaged, the gap is insufficient, and the high temperature friction generated by the oil seal, etc. The bearing rolling body and the inner and outer ring rolling The pavement is subjected to periodic pulsating loads, resulting in cyclically varying contact stresses.

When the number of stress cycles reaches a certain value, fatigue peeling occurs on the rolling element or the inner and outer ring raceways. If the bearing load is too large, this fatigue will be exacerbated. In addition, the IKO bearing is not properly installed, the shaft is bent, and the raceway is peeled off. Fatigue spalling of the bearing races reduces the accuracy of the shaft and causes vibration and noise in the mechanism. The outer spherical bearing of the burn has a tempering color on the raceway and the rolling element. The causes of burns are generally insufficient lubrication, the quality of the lubricant does not meet the requirements or deterioration, and the bearing assembly is too tight.

Uneven pits appear on the contact surface between the raceway and the roller of the bearing, indicating that the overall eccentric bearing is plastically deformed. The reason is that the IKO bearing has a large static load or impact load, and the local stress of the working surface exceeds the yield limit of the material, which generally occurs on bearings rotating at low speed.

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