The four-point contact ball bearings are radial single row angular contact ball bearings featuring raceways that can handle axial loads acting in both directions. A limited radial load can be supported for a given axial load.
Tower crane slewing bearing maintenance and repair methods:
1, the tower crane slewing bearing installation must have enough rigidity, the installation surface to level off.Before assembling the slewing bearing, the slewing bearing should be de-stressed, and the deformation of the slewing bearing should be reduced during maintenance. The contact surface between the slewing bearing and the slewing bearing must be cleaned up during assembly.
2. Pay attention to the change of noise and the change of rotary resistance moment.
3. The slewing bearings must be lifted or stored horizontally, tower crane maintenance do not lift or stored vertically, to avoid deformation.
4. Tower crane slewing bearing to tighten the bolts completely, first in maintenance ability of gear meshing, the meshing condition should accord with the requirement of precision gear: tower crane maintenance technology namely gear pair under slight brake operation after the distribution of the tooth surface contact spots on the direction of tooth height not less than 25%, tower crane maintenance technology on the tooth length direction is not less than 30%.
5. The tower crane slewing should work every 10 shifts to clean the surface, remove the surface debris, reapply the lubricating oil.
6. The slewing bearing of tower crane shall be maintained after 100 hours and 500 hours of operation, and the pre-tightening torque of bolts shall be checked.
7. The bolts and nuts on the slewing bearing of tower crane shall be tightened and relaxed with double nuts to effectively ensure that the bolts and nuts will not slip or loosen.
>>1.Are you a factory or a trading company?
1.We are a manufacturer of slewing bearing and slewing drive with experience over 18 years.
2.Our company covers area over 20000 square meters.
3.We have over 90 sets production machines, such as 4m CNC Raceway Quenching Machine,CNC integral tooth quenching machine,Gear Milling machine,5m Vertical Lathe etc.
>> 2.What are your advantages compared with others?
1.Passed ISO9001:2015, CCS, SGS ,BV certificates;
2.Timely & dependable delivery, good quality and competitive price enable our company to maintain 30% increase on annual sales;
3.Patented slewing bearing and slewing drive.
4.Passed the Factory -Audit process and established cooperation with world-famous companies, such as XCMG, SANY, SUNWARD,TEREX etc.
>>3,How do you guarantee the delivery time?
We have strict production schedule and keep stock of material for standard models to ensure the delivery time.
25-30 days for standard model;
45-55 days for customized model.