How to inspect and measure SKF bearings and common maintenance methods

First, the preparation work before installing SKF bearings

1) Bearing preparation

Since the bearings are rust-proofed and packaged, do not open the package until the device is installed.

Secondly, it can be checked whether the size, shape and processing quality of the shaft and the casing can match the drawing.

2) Inspection of the shaft and the outer casing

Before the bearing of the device, the mechanical oil is applied to the mating surfaces of the shaft and the casing that have passed the inspection.

In addition, the anti-rust oil coated on the bearing has good smooth performance, and the bearing for ordinary use or the bearing filled with smooth grease can be directly used without cleaning. However, with regard to the bearing for the instrument or the bearing for high-speed rotation, the cleaning oil is washed with the cleaning oil, and the bearing is easily rusted and cannot be placed for a long time.

Clean the bearing and the casing to confirm the burrs left by scratches or machining. There must be no abrasive (SiC, Al2O3, etc.) sand or chips in the outer casing.

Second, how to install SKF bearings

In most cases we found its possible cause. In general, one-third of the bearing damage is caused by fatigue damage, and the other third is due to poor smoothness, and the other one-third cause Improper disposal of contaminants into SKF bearings or devices. In order to reduce the bearing damage device SKF bearing must pay attention to the following points:

1. When using the device, it must be carefully and accurately installed. As with the requirements of the bearings of other devices, it is not allowed to punch strongly. It is not allowed to directly hit the bearing with a hammer, and it is not allowed to transmit pressure through the rolling element.

2, as the saying goes, the eyes can not be a little bit of sand, the same bearing and its surrounding environment must also be clean. I don't need to say it, I know what is going on, even if the dust that is invisible to the naked eye enters the bearing, it will cause the bearing to wear out.

3, the use of appropriate, accurate device tools

Try to use special tools to prevent the use of cloth and short fibers.

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Regular maintenance of the main role of imported bearings

1. Imported bearings support: In order to maintain the original performance of the imported bearings in good condition for as long as possible, it is necessary to support, repair, and prevent accidents, ensure the reliability of operation, and improve consumption and economy.

The operating specifications that best correspond to the mechanical operating conditions are maintained and stopped periodically. The content includes monitoring of operating conditions, replenishment or replacement of smoothing agents, and periodic disassembly inspections. The maintenance items in operation include the rotating sound of the imported bearings, vibration, temperature, and the state of the smoothing agent.

2. Inspection and repair of the bearing: Cleaning of the bearing: When disassembling the bearing for repair, first record the appearance of the imported bearing, confirm the residual amount of the smoothing agent, and wash the bearing after sampling the smoothing agent. As a cleaning agent, gasoline and kerosene are commonly used.

The cleaning of the removed imported 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. In rough cleaning, if the bearing is rotated with dirt, it will damage the rolling surface of the imported bearing and should be noted. In the rough cleaning oil, use a brush to remove the smooth grease and adhesive, and after roughly cleaning, transfer to the fine wash.

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.

3. Inspection and discrimination of the bearing: In order to judge whether the removed imported bearing can be used, it is necessary to check after the bearing is cleaned. Check the condition of the raceway surface, the rolling surface, the mating surface, the wear condition of the holding frame, the increase of the bearing clearance, and the damage and abnormality caused by irrelevant dimensional accuracy. For non-detached small ball bearings, use one hand to support the inner ring and rotate the outer ring to confirm whether it is fluent.

For tapered bearings such as tapered roller bearings, the rolling surfaces of the rolling elements and the outer ring can be inspected separately.

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