The usage method of square hole agricultural machinery bearings with four corners

Four corner square hole agricultural machinery bearings (such as 390000 series outer spherical bearings) play an important role in agricultural machinery, and their usage involves installation, maintenance, and other aspects. The following is a detailed explanation of its usage method:

1、 Installation steps

Prepare tools:

Hexagonal wrench: used to loosen the locking screw on the bearing eccentric sleeve.

Small iron rod and hammer: used for loosening eccentric sleeves and striking during installation.

Lubricating oil: used for lubricating bearings and bearing seats.

Dismantling old bearings:

Use an Allen wrench to loosen the locking screw on the bearing eccentric sleeve.

Insert a small iron rod into the countersunk hole on the top cover eccentric sleeve and loosen the eccentric sleeve against the rotation direction of the shaft.

Loosen the bolts securing the bearing seat and remove the bearing and bearing seat from the shaft together. Before disassembling the bearing seat at one end of the shaft, the bolt of the bearing seat at the other end of the shaft should be loosened to prevent damage to the bearings at both ends due to mutual interference.

Install new bearings:

Before installing the bearing on the shaft, it is necessary to first remove the fixing pin of the bearing sleeve, polish the surface of the shaft neck smooth and clean, and apply oil to the shaft neck for rust prevention and lubrication (allowing the bearing to rotate slightly on the shaft).

Apply lubricating oil to the mating surface between the bearing seat and the bearing, and install the bearing into the bearing seat. Then fit the assembled bearings and bearing seats onto the shaft and push them to the desired position for installation.

Do not tighten the bolts that fix the bearing seat yet, but allow the bearing sleeve to rotate within the bearing seat. Install the other end bearing and seat on the same shaft, rotate the shaft a few times to automatically align the bearing, and then tighten the bearing seat bolts.

Install eccentric sleeve. First, insert the eccentric sleeve onto the eccentric step of the bearing inner sleeve and tighten it by hand in the direction of the shaft rotation. Then insert or press the small iron rod into the countersunk hole on the eccentric sleeve, and use a hammer to strike the small iron rod in the direction of axial rotation to firmly install the eccentric sleeve. Finally, tighten the hexagonal socket screw on the eccentric sleeve.

2、 Usage and maintenance

Maintain cleanliness and lubrication:

Regularly clean the impurities and dust in the bearing and its surrounding environment to prevent them from entering the interior of the bearing, affecting the lubrication effect and normal operation of the bearing.

According to the working conditions and instructions of the bearings, select appropriate lubricants and add them on time to ensure that the bearings are in good lubrication condition, reduce friction and wear, and extend their service life.

Control load and speed:

Avoid bearing long-term loads beyond its design range, as well as excessive rotational speeds, which may accelerate bearing wear and damage.

When starting and stopping the equipment, it should be operated smoothly to avoid sudden impact loads causing damage to the bearings.

Regular inspection:

By observing the operating sound, temperature, and vibration of the bearing, the health condition of the bearing can be preliminarily determined.

Once an abnormality is detected, the machine should be stopped for inspection in a timely manner, the cause should be identified, and corresponding maintenance measures should be taken to prevent the fault from expanding.

Reasonably arrange the replacement cycle:

Even in normal use, bearings will gradually wear out over time.

Therefore, based on the frequency of use, working conditions, and the material and performance of the bearings, a reasonable replacement plan should be developed to promptly replace aging and damaged bearings, ensuring the continuous and stable operation of the equipment.

In summary, the use of square hole agricultural machinery bearings involves multiple aspects such as installation and maintenance. Only by following the correct methods of operation and maintenance can the normal operation and extended service life of bearings be ensured.