INA forklift bearing abnormal condition daily simple maintenance

Contact fatigue failure refers to the failure of the INA bearing working surface to be affected by alternating stress. Contact fatigue spalling occurs on the working surface of the forklift bearing, often accompanied by fatigue cracks, first from the maximum alternating shear stress below the contact surface, and then extended to the surface to form different peeling shapes, such as pitting or pitting , peeling off into small pieces called shallow peeling. Due to the gradual enlargement of the exfoliation surface, it tends to expand deeper and form deep exfoliation. Deep exfoliation is the source of fatigue in contact fatigue failure.

Wear failure refers to the failure of the relative sliding friction between the surfaces resulting in the continuous wear of the metal on the working surface. Continued wear and tear will cause gradual damage to the INA bearing parts and ultimately lead to loss of dimensional accuracy of the forklift bearings and other related problems. The wear of the crucible may affect the shape change. The increase of the clearance and the change of the surface of the working surface may affect the lubricant or cause the pollution to a certain extent, resulting in complete loss of the lubrication function, thus causing the bearing to lose the rotation precision or even the normal operation.

1. When the bearing is running for a certain period of time (or maintenance period), remove all the bearings;

2. Soak the bearings with diesel or kerosene for cleaning. If there are technical conditions, it is best to open the sealing cover for cleaning;

3, dry cleaning oil after cleaning, visual inspection for damage;

4. Use a wooden rod with a diameter of about 150 mm and an inner diameter of the INA bearing (preferably a hollow tube), and fix one bearing at one end;

5. While rotating the bearing by hand, the other end of the wooden rod (wood tube) is placed on the ear or the audio amplifier microphone to hear the bearing rotation noise;

6. After the bearing is fixed, move the wooden rod horizontally to check whether the bearing is loose or not;

7. Forklift bearings with severe looseness, excessive rotating noise and serious defects should be eliminated and replaced by the same model;

8. Take a bucket and melt the appropriate amount of grease (high-quality yellow dry oil) with a simmer (not overheated). Place the tested bearings in a bucket and soak them in a bubble-free overflow.

Remove the bearing before cooling the grease and reduce the amount of residual grease. After the grease is cooled, the INA bearing is taken out and the amount of residual grease is large. Determine the amount of grease remaining as needed.

9. Wipe the grease on the outside of the bearing with a soft cloth or toilet paper to assemble the forklift bearing to the pulley. The maintenance work is over.

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How to prevent premature failure of INA stainless steel bearings

Bearings in the process of use for various reasons, will cause failure problems, then what are the failures of stainless steel bearings? We classify the failure modes of rolling bearings. These forms are the most basic three forms of rolling bearing failure. There are many reasons for bearing failure. All the factors affecting the design and manufacturing process will be related to the failure of the INA bearing. It is difficult to judge by analysis. In general, it can be considered and analyzed in terms of both usage factors and internal factors.

Wear, poor lubrication, intrusion of impurities and dust can cause wear and tear, which causes the INA bearing to lose its rotational accuracy and fail, which is the external cause. We should pay attention to maintenance and cleaning.

When the bearing speed is low or intermittently oscillated, fatigue pitting does not generally occur. At this time, the bearing is often plastically deformed due to excessive static load or impact load, which causes the stainless steel bearing to fail. This is the problem of work intensity. It is necessary to first match the strength of the bearing, that is, what is the speed required for your work, and choose the bearing that matches it.

(1) Surface oxide layer

The surface of the steel under transient high temperature acts on the oxygen in the air and rises into a very thin (20-30 nm) thin layer of iron oxide. It is worth noting that the thickness of the oxide layer is corresponding to the test results of the total thickness of the surface-grinding metamorphic layer. This shows that the thickness of the oxide layer is directly related to the grinding process and is an important indicator of the quality of the grinding.

(2) amorphous layer

When the instantaneous high temperature of the grinding zone causes the surface of the workpiece to reach a molten state, the molten metal molecular flow is uniformly applied to the working surface, and is cooled by the base metal at a very fast speed to form a very thin layer of amorphous state. Organizational layer. It has high hardness and toughness, but it is only about 10 nm and is easily removed in precision grinding.https://www.supplyforever.com/