After the NSK bearing is installed, in order to check whether the installation is correct, it is necessary to carry out a running inspection. Small machines can be rotated by hand to confirm whether they rotate smoothly. The inspection items include improper operation due to foreign objects, scars, and indentations, unstable torque due to poor installation and poor processing of the mounting seat, excessive torque due to too small clearance, installation errors, and seal friction, etc. Wait. If there is no abnormality, power operation can be started. Large-scale machinery cannot be rotated manually, so immediately cut off the power after starting without load, and the machinery is idling. Check for vibration, noise, and contact with rotating parts. After confirming that there is no abnormality, enter the power operation.

    The power operation starts at a low speed with no load and slowly increases to the rated operation under the specified conditions. The items to be checked during the test run are whether there are abnormal sounds, changes in NSK bearing temperature, leakage or discoloration of lubricants, etc. If an abnormality is found, stop the operation immediately, inspect the machine, and remove the bearing for inspection if necessary.

    NSK bearing temperature can generally be estimated based on the external temperature of the bearing seat. However, it is more accurate to use the oil hole to directly measure the temperature of the outer ring of the bearing. The temperature of the bearing gradually increases from the start of operation, and usually stabilizes after 1 to 2 hours. If the bearing is installed improperly, the temperature will rise sharply, resulting in abnormally high temperature. The reasons include too much lubricant, too small bearing clearance, poor installation, and excessive friction of the sealing device. In the case of high-speed rotation, the wrong choice of NSK bearing structure and lubrication method is also the reason.

    The rotating sound of the NSK bearing is checked with a stethoscope, etc. There are strong metal noises, abnormal sounds, irregular sounds, etc., indicating abnormalities. The reasons are poor lubrication, poor shaft or bearing seat accuracy, bearing damage, and foreign matter intrusion.
Contact us to buy NSK Bearing 6205ZZCM. Eric Bearing Limited has enough products in stock.

    Common faults of NSK bearings are as follows:

1. Corrosion of tile surface: Spectral analysis found that the concentration of non-ferrous metal elements is abnormal; there are many sub-micron wear particles with non-ferrous metal components in the iron spectrum; the moisture of lubricating oil exceeds the standard and the acid value exceeds the standard.

2. Strain on the journal surface: there are iron-based cutting abrasive particles or black oxide particles in the iron spectrum, and the metal surface has a tempered color.

3. Corrosion of journal surface: Spectral analysis found that the concentration of iron is abnormal, there are many sub-micron particles of iron in the iron spectrum, and the water content of the lubricating oil is excessive or the acid value is excessive.

4. Surface strain: cutting abrasive particles are found in the iron spectrum, and the abrasive particles are composed of non-ferrous metals.

5. Fretting wear on the back of the tile: Spectral analysis found that the iron concentration is abnormal, there are many sub-micron wear particles of iron in the iron spectrum, and the lubricant moisture and acid value are abnormal.

Under liquid lubrication conditions, the sliding surface is separated by the lubricating oil without direct contact, and friction loss and surface wear can be greatly reduced. The oil film also has a certain vibration absorption capacity.

    In addition to excellent quality, NSK bearings are also very precise parts. They are high-performance NSK bearings. If they are used improperly, they will not only fail to achieve the expected performance results, but also easily damage the NSK bearings. In terms of lubrication, everyone It must have been noticed. In addition to lubrication, what other aspects need to be paid attention to during the use of NSK bearings.

1. Be careful when using and installing

It is not allowed to press forcefully, directly hit the bearing with a hammer, and not to transmit pressure through the rolling elements.

2. Use appropriate and accurate installation tools

Try to use special tools and try to avoid using things like cloth and short fibers.

3. Try to keep the NSK bearing and its surrounding environment clean

Even if invisible smile dust enters the bearing, it will increase bearing wear, vibration and noise.

Fourth, prevent the corrosion of NSK bearings

    When picking up NSK bearings by hand, wash away the sweat from your hands and apply high-quality mineral oil before operating. Pay special attention to rust prevention during the rainy season and summer.

    Under certain special operating conditions, NSK bearings can obtain a longer life than traditional calculations, especially under light load conditions. These special operating conditions are when the rolling surfaces (tracks and rolling elements) are effectively separated by a lubricating oil film and limit contaminants that may cause surface damage. In fact, under ideal conditions, the so-called permanent NSK bearing life is possible.