INA roller bearings are maintenance inspection standards

In order to fully utilize INA bearings and maintain their proper performance for a long time, regular maintenance (regular inspection) must be performed. Through proper periodic inspections, early detection of failures and prevention of accidents are important to improve productivity and economy.

Key factors affecting the life of a roller bearing For many rotating machinery products, their service life depends on the life of the bearing components at critical parts of the product. "Maintenance-free" bearings are not one-way bearings that will never be damaged or failed but will not be damaged within a certain period of time. Here the designers calculate the service life of the bearing. The bearing life of the INA bearing is greater than or equal to the overhaul period of the mechanical product. The bearing can be “maintenance free”. When the mechanical product is overhauled, the new bearing can be replaced without using the used bearing. Carry out maintenance.

1, cleaning

When the INA bearing is removed for inspection, the appearance record is first recorded by photography. Also, verify the amount of lubricant remaining and sample the lubricant before cleaning the bearings.

a. The cleaning of the bearing is carried out by rough washing and fine washing, and a metal mesh frame can be placed on the bottom of the used container.

b. When rough washing, remove the grease or adhesive with a brush or the like in the oil. At this time, if the bearing is rotated in the oil, be careful that the rolling surface will be damaged by foreign matter or the like.

c. When washing finely, slowly rotate the bearing in the oil and carry out it carefully.

The cleaning agent generally used is a neutral non-aqueous diesel oil or kerosene, and a warm alkali liquid or the like is sometimes used as needed. Regardless of which cleaning agent is used, it is often filtered and kept clean.

Immediately after cleaning, apply anti-rust oil or anti-rust grease to the roller bearings.

2, inspection and judgment

In order to judge whether the removed bearing can be reused, it is important to check its dimensional accuracy, rotation accuracy, internal clearance, mating surface, raceway surface, cage and seal.

Regarding the inspection result, it can be judged by a person who is using a conventional bearing or a proficient bearing.

The criteria for judgment vary depending on mechanical properties and importance, inspection period, and the like. Roller bearings must not be reused if they are damaged and must be replaced.

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Operation of TIMKEN imported bearings should be regularly maintained

1, grease lubrication

Relubrication of TIMKEN imported bearings is best carried out during planned equipment downtime and is periodically replenished, while removing old grease or extruding old grease through the drain. Wipe the grease fittings clean before adding fresh grease. If the bearing housing does not have a grease fitting, the bearing housing cover or end cap should be opened to remove the old grease and, after cleaning, replenish the same type of fresh grease.

2, lubricating oil lubrication

Regularly check the oil level and oil quality of the lubricating oil. Under normal circumstances, the normal oil level should be within the range of 1/3-2/3 of the equipment oil level window or mark. The oil filling method is oil cup, the oil level shown only represents the oil replenishing capacity, and the bearing tank oil level is to meet the operation requirements. The oil level in the oil cup is less than 1/4 of its total volume.

Check and replenish the oil method, take a small amount of lubricating oil as a sample and compare it with fresh oil. The competent unit can consider the oil quality test to ensure the oil quality is qualified. If the sample looks cloudy, it may be the result of mixing with water, which is commonly referred to as oil emulsification. At this point, the lubricant should be replaced.

If the sample is darkened or thickened, it may indicate that the lubricant has begun to carbonize and the old lubricant should be completely replaced. If possible, flush the oil line with fresh oil. When changing the lubricating oil, make sure that the new and old models of the replaced oil are the same and supplement the required oil level.

Use an oil bath type lubrication system. If the oil temperature is below 60 ° C (140 ° F) and the lubricant is not contaminated, replace the lubricant once a year. If the oil temperature is 60-100 ° C (140-210 ° F), the lubricant needs to be replaced four times a year. If the oil temperature is between 100 and 120 ° C (210-250 ° F), the lubricant needs to be replaced once a month. If the oil temperature is above 120 ° C (250 ° F), the lubricant needs to be replaced once a week.

Proper installation and maintenance are important factors in the normal operation of the bearing. At the same time, care must be taken to maintain the cleanliness of the bearing. Bearings must be protected from contaminants and moisture and must be properly installed and lubricated. In addition, the design of the bearing arrangement, the condition of the oil seal, the form of the lubricant and the replacement cycle and the special maintenance also play an important role and must be paid attention to.

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The inherent and main causes of SKF bearings

1. The small machine can be rotated by hand to confirm whether the rotation is smooth. The inspection items have poor operation due to foreign matter, scratches, and indentations. The installation is poor, the torque generated by the mounting is not stable, and the torque is too large due to too small clearance, installation error, and sealing friction. Wait. If there is no abnormality, the power running can be started.

2, large machinery can not be manually rotated, so immediately after the start of the no-load, the power is cut off, the machine idling, check for vibration, noise, whether the rotating parts are in contact, etc., to confirm that there is no abnormality, enter the power running. The power running starts from the no-load low speed and slowly increases to the rated operation of the specified conditions. The items to be checked during the test run are whether there are abnormal sounds, changes in the temperature of the SKF bearing, leakage or discoloration of the lubricant, and the like. If an abnormality is found, stop the operation immediately, check the machine, and remove the bearing check if necessary.

SKF bearing temperature can generally be estimated based on the external temperature of the housing. However, it is more accurate to directly measure the temperature of the outer ring of the bearing by using the oil hole. The bearing temperature gradually rises from the start of the operation, and the temperature is usually stable after 1 to 2 hours. If the bearing is poorly installed, the temperature will rise sharply and an abnormally high temperature will occur. The reasons are such as excessive lubricant, too small bearing clearance, poor installation, excessive friction of the sealing device, and the like. In the case of high-speed rotation, the selection of SKF bearing structure and lubrication method is also the cause.

The rotation sound of SKF bearings is checked with a stethoscope, etc., and there are strong metal noise, abnormal sounds, irregular sounds, etc. to explain abnormalities. The reasons are poor lubrication, poor accuracy of the shaft or housing, bearing damage, and foreign matter intrusion.

From the two aspects of the reasons for use and internal factors, the reasons for the effectiveness of SKF bearings, the main factors are whether our use is reasonable, the internal factors are actually the level of our choice of bearings! !

The use factors mainly refer to whether the installation adjustment, use and maintenance, maintenance and repair, etc. meet the technical requirements. Installation conditions are one of the primary factors in the use of factors. SKF bearings are often improperly installed, resulting in changes in the force state between the various parts of the bearing, and the bearings operate in an abnormal state and fail early. According to the technical requirements of SKF bearing installation, use, maintenance and maintenance, monitor and check the load, speed, working temperature, vibration, noise and lubrication conditions of the bearing in operation, find out the cause and immediately adjust the cause, make adjustment It returned to normal. In addition, it is important to analyze the quality of the grease and the surrounding medium and atmosphere.

The internal factors mainly refer to the three major factors that determine the quality of SKF bearings, such as structural design, manufacturing process and material quality. First of all, the structural design is reasonable and advanced, so that it will have a long bearing life. Bearings are generally manufactured through multiple processes such as forging, heat treatment, turning, grinding and assembly. The rationality, advancement and stability of each processing technology will also affect the life of the bearing. The heat treatment and grinding processes that affect the quality of the finished bearing often have a more direct relationship with the failure of the bearing. In recent years, research on the metamorphic layer of bearing working surface shows that the grinding process is closely related to the bearing surface quality.

For more information and purchase please visit: https://www.supplyforever.com

The inherent and main causes of SKF bearings

1. The small machine can be rotated by hand to confirm whether the rotation is smooth. The inspection items have poor operation due to foreign matter, scratches, and indentations. The installation is poor, the torque generated by the mounting is not stable, and the torque is too large due to too small clearance, installation error, and sealing friction. Wait. If there is no abnormality, the power running can be started.

2, large machinery can not be manually rotated, so immediately after the start of the no-load, the power is cut off, the machine idling, check for vibration, noise, whether the rotating parts are in contact, etc., to confirm that there is no abnormality, enter the power running. The power running starts from the no-load low speed and slowly increases to the rated operation of the specified conditions. The items to be checked during the test run are whether there are abnormal sounds, changes in the temperature of the SKF bearing, leakage or discoloration of the lubricant, and the like. If an abnormality is found, stop the operation immediately, check the machine, and remove the bearing check if necessary.

SKF bearing temperature can generally be estimated based on the external temperature of the housing. However, it is more accurate to directly measure the temperature of the outer ring of the bearing by using the oil hole. The bearing temperature gradually rises from the start of the operation, and the temperature is usually stable after 1 to 2 hours. If the bearing is poorly installed, the temperature will rise sharply and an abnormally high temperature will occur. The reasons are such as excessive lubricant, too small bearing clearance, poor installation, excessive friction of the sealing device, and the like. In the case of high-speed rotation, the selection of SKF bearing structure and lubrication method is also the cause.

The rotation sound of SKF bearings is checked with a stethoscope, etc., and there are strong metal noise, abnormal sounds, irregular sounds, etc. to explain abnormalities. The reasons are poor lubrication, poor accuracy of the shaft or housing, bearing damage, and foreign matter intrusion.

From the two aspects of the reasons for use and internal factors, the reasons for the effectiveness of SKF bearings, the main factors are whether our use is reasonable, the internal factors are actually the level of our choice of bearings! !

The use factors mainly refer to whether the installation adjustment, use and maintenance, maintenance and repair, etc. meet the technical requirements. Installation conditions are one of the primary factors in the use of factors. SKF bearings are often improperly installed, resulting in changes in the force state between the various parts of the bearing, and the bearings operate in an abnormal state and fail early. According to the technical requirements of SKF bearing installation, use, maintenance and maintenance, monitor and check the load, speed, working temperature, vibration, noise and lubrication conditions of the bearing in operation, find out the cause and immediately adjust the cause, make adjustment It returned to normal. In addition, it is important to analyze the quality of the grease and the surrounding medium and atmosphere.

The internal factors mainly refer to the three major factors that determine the quality of SKF bearings, such as structural design, manufacturing process and material quality. First of all, the structural design is reasonable and advanced, so that it will have a long bearing life. Bearings are generally manufactured through multiple processes such as forging, heat treatment, turning, grinding and assembly. The rationality, advancement and stability of each processing technology will also affect the life of the bearing. The heat treatment and grinding processes that affect the quality of the finished bearing often have a more direct relationship with the failure of the bearing. In recent years, research on the metamorphic layer of bearing working surface shows that the grinding process is closely related to the bearing surface quality.

For more information and purchase please visit: https://www.supplyforever.com