Wholesales High Quality Slewing bearing Maintenance Update 2022

1.Slewing bearing maintenance and repair methods and matters needing attention

The mounting support of the slewing bearing maintenance must have sufficient rigidity and the mounting surface should be flat. Before assembling the slewing bearing, the slewing bearing maintenance should be treated with stress relief, and the slewing bearing maintenance and the slewing bearing should reduce the deformation of the slewing bearing. When assembling, the contact surface between the bearing and the slewing bearing must be cleaned.

2. Pay attention to the change of noise and the change of the slewing resistance torque during the use of the slewing bearing and the slewing bearing maintenance. If there is any abnormality in the slewing bearing maintenance and the slewing bearing, it should be dismantled and inspected.

3. The slewing bearing must be lifted or stored horizontally, and must not be lifted or stored vertically to avoid deformation.
​​
4. Before the slewing bearing maintenance and slewing bearing are tightened, the meshing inspection of the gear should be carried out, and the meshing condition should meet the requirements of the gear accuracy:

that is, the contact spots distributed on the tooth surface of the gear pair after running under slight braking are on the wheel. Not less than 25% in the direction of tooth height and not less than 30% in the direction of tooth length.
​​
5. The slewing bearing maintence and slewing bearing tooth surface should be cleaned for 10 shifts and re-applied with grease.
​​
6. Slewing bearing maintence and slewing bearing In order to ensure the reliability of bolt operation and avoid insufficient bolt pre-tightening force, after 100 hours and 500 hours of slewing bearing maintence operation, both slewing bearing and slewing bearing should check the pre-tightening torque of bolts respectively. The preload torque should be checked every 1000 hours thereafter

7. The bolts and nuts connecting the slewing bearing are made of high-strength bolts and nuts; double nuts are used to fasten and prevent loosening.
​​
8. When tightening the nut of the slewing bearing and the slewing bearing maintence, lubricating oil should be applied to the thread of the bolt and the surface of the nut, and the torque wrench should be used to tighten it symmetrically and evenly in the circumferential direction for many times.

The pre-tightening torque on each bolt should be approximately uniform when tightening the second pass.
​​
9. Four oil cups are evenly distributed on the upper surface of the ring gear of the slewing bearing aligned with the raceway, thereby adding grease to the raceway. Under normal circumstances, the slewing bearing runs for 50 hours with lubrication times. You must add enough oil each time until grease seeps out of the seal.

2.slewing bearing maintence effect

1. During the use of the machine, we should add lubricating oil to the bearing in time, because the excessive operation of the bearing can easily lead to a large number of wear problems. Dropping lubricating oil every two to three hours can reduce this problem. friction damage.
​​
2. The slewing bearing is a component with a high reimbursement rate in the whole machine, so when we buy the corresponding machine, we should pay attention to adding a few spare parts when purchasing the bearing, and the material of the spare bearing should also be selected well Otherwise, the bearing will be eliminated soon after use, or the performance of the machine will not be evaporated.
​​
3. The machine should be cleaned every month. At this time, don’t pay attention to dismantling the bearing for cleaning, and clear the large amount of oil or other dirt attached to the bearing, so as to make the whole bearing work effectively. be improved.

In addition, it should be noted that after the slewing bearing has been running for 100 hours, the bolt pre-tightening force should be checked, and every 500 hours of operation in the future must maintain sufficient pre-tightening force.

In use, it is forbidden to directly wash the slewing bearing with water to prevent water from entering the raceway, and strictly prevent hard foreign objects from approaching or entering the tooth meshing area.

Check the integrity of the seal frequently. If the seal ring is found to be damaged, it should be replaced in time, and if it is found to fall off, it should be reset in time. During use, grease should be added regularly. Generally, ball slewing bearings are refueled every 100 hours, and roller slewing bearings are refueled every 50 hours.

In special working environments, such as high temperature, high humidity, and dust , When the temperature changes greatly and when working continuously, the lubrication cycle should be shortened.

When injecting grease, turn the turntable bearing slowly so that the grease is filled evenly. For slewing bearings with internal teeth or external teeth, debris should be removed frequently and the corresponding grease should be applied.