Slewing Ring Bearing For Sale

1.Installation of large slewing ring bearings

1 Disposal of slewing ring bearing maintenance

1.1 Anti-rust and packaging

The inner and outer surfaces of the slewing ring bearing are evenly coated with anti-rust and lubricating oil on both sides of the bearing, and the packaging is wrapped with plastic film kraft paper and linen strips. The outer surface of the large-size slewing bearing should also be wrapped with plastic cloth. For small size slewing bearings, use wooden boxes.

1.2 Warehousing

Regardless of whether it is a new bearing or a slewing bearing that is maintained or repaired, the parts need to be individually rust-proof and lubricated. The whole piece needs to be maintained in accordance with the standard of JB/T10471, including the accuracy of the bearing, horizontal placement, dust-proof, and lubrication. During the stacking period, it is strictly forbidden to tilt, place under heavy pressure, and place in the open air. The principle of storage allowable time is 10 months. The packaging adopts three layers of protection. After adding grease, the appearance is rust-proof. Film, kraft paper, foam padding, plus wrapping tape.

transportation

Keep the bearings as horizontal as possible during transportation, only allow a slight tilt, and avoid large bumps or vibrations. After unpacking, screw the lifting bolt into the lifting hole of the inner ring or outer ring to transport the bearing to the installation position.

1.3 Safekeeping

1.3.1 In the rust-proof period before use (within 12 months after the bearing leaves the factory). Do not open the package. If maintenance is required, the raceway, outer surface and tooth surface of the slewing bearing should be treated with anti-rust treatment.

1.3.2 Lay it horizontally on a dry and flat site.

1.3.3 If the slewing bearing is stored for more than 12 months, it should be re-rusted.

1.3.4 If multiple sets of slewing bearings are stacked together, at least three evenly distributed wooden pads should be placed between each set of slewing ring bearings along the circumferential direction, and the upper and lower pads should be placed in the same position.

2 Installation of slewing bearing

2.1 Preparation before installation

2.1.1 The connecting surfaces of the supporting parts shall be machined, and then these surfaces shall be free of burrs and debris.

2.1.2 When the radial load exceeds 10% of the axial load, there should be radial positioning, and the connecting surface that cannot be machined should be flattened by injection molding.

2.1.3 When unpacking the bearing before installation, care should be taken to avoid damage to the seal and prevent dust from entering the inside of the bearing. Within the specified anti-rust period, it is not necessary to disassemble and clean before installation.

2.2 Soft belt position

The quenched soft tape of the slewing bearing ring is marked “S”. When installing, the position of the soft belt should be in the non-loading area or the non-recurrent load area (the filling plug is always located at the soft belt of the ferrule.)

2.3 Ring gear inspection

Before the mounting bolts are not fully tightened, the gear meshing check should be carried out to ensure that the meshing clearance and the accuracy requirements of the gears are met.

2.4 Tightening of mounting bolts

When installing bolts, quenched and tempered flat washers can be used, and spring washers are prohibited.

After locating the slewing bearing radially, tighten the mounting bolts crosswise and check the free rotation of the bearing at the same time.

There should be sufficient pre-tightening force when tightening the bolt, and its pre-tightening force should be 70% of the yield limit of the bolt material.

3 Use and maintenance

3.1 Inspection of mounting bolts and abnormal phenomena

After about 100 hours of operation of the slewing bearing, check the pre-tightening torque of the mounting bolts of the inner ring and the outer ring, and every 500 hours of operation thereafter.

If there are abnormal phenomena such as noise, impact, and sudden increase in power during use, it should be shut down for inspection.

3.2 Lubrication

After the slewing bearing is installed, it should be filled with suitable grease according to the actual use conditions, and the slewing bearing should be filled while the grease is evenly distributed until the new grease begins to squeeze out of the sealing lip. Fill it every 50~100 hours, and the oiling cycle should be shorter in high environment and dusty conditions. New grease must also be added before and after the machine has been stopped for a long time.

3.3 Cleaning and assembly of slewing bearing

In the assembled slewing bearing, the parts between sleeves and between rows and between rows are not interchangeable. When the bearing is disassembled and cleaned, it should be carried out according to the bearing assembly drawing, and the upper and lower half rings should be assembled according to the original drilling position.

The tooth surface should be cleaned of debris every 10 days and coated with grease.

3.4 Selection of Grease

For the lubrication of the slewing bearing, because there are many comprehensive working factors, the user can choose the best grease according to the specific requirements.