Double-row Ball Slewing Ring Bearing
Double-row Ball Slewing Ring with Same Diameter Balls
Double-row ball slewing ring with same diameter balls is usually used for wind driven generators and concrete pump trucks. In wind driven generator applications, double-row ball slewing ring is often installed at the bottom of propellers for variable pitch control which requires zero clearance, large start friction moment and high running accuracy.
- Outer diameter: 704mm~4395mm
- Ball diameter: 25mm~60mm
With compact construction, the double-row ball slewing ring bearing decreases the diameter of mounting holes in the inner and outer ring and increases the loading capacity.
Double-row ball slewing ring bearing usually comprises 3 rings, steel balls and spacers can enter the upper and lower raceways directly. Two sets of steel ball are placed based on the force analysis. With such configuration, the 90° bearing angles of the upper and lower arc raceway enable the bearing to take large axial force and tilting moment. Special design is needed for the raceway when the radial force is greater than one tenth axial force.
- Range of external diameter: 100 mm to 15000 mm
- Ring material: 42CrMo / 50Mn/ C45
- Ball/roller material: GCr15
- Cage material: steel 20 or ZL102 cast aluminum alloy
- Spacer material: nylon 6 / nylon 66
- Quenching hardness of raceway: HRC55-62
- Tooth type: no gear, internal gear, external gear
- Excavator
- Crawler crane
- Port machinery
- Amusement facilities
- 1 Inner Ring
- 2 Outer Ring
- 3 Seal
- 4 Spacer
- 5 Ball/Roller
The sealing of the slewing bearing, on the one hand, is to prevent the leakage of filled grease, on the other hand, is to prevent the outside dust, impurities and moisture from invading into the exterior of the bearing and affecting its work. The sealing ring of LYJW slewing bearing is made of nitrile rubber material, which is resistant to high temperature and corrosion.
The surface of bearing raceways are quenched, whose quenching hardness is HRC55-62, ensuring its effective hardening depth.
Due to the need to transmit force, slewing bearings usually have teeth on one of the rings. The toothing is generally normalized or quenched and tempered. Depending on the application, the gears can also be full-tooth hardened or single-tooth inductively hardened. Single tooth inductively hardening can be divided into full tooth hardening and tooth foot (flanks and base) hardening.
Full tooth hardening
Tooth flanks and base hardening
Tooth flanks Hardening
Custom Bearings
Our dedicated team is on hand to provide help and expertise throughout the process. Whether you are ordering from our standard range of products or you want a tailored solution for your current project, they are ready to help you every step of the way.
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LYJW is a professional manufacturer of slewing bearings and we can design and manufacture slew ring bearings, precision bearings, slew drives and custom bearings for construction, engineering, mining, marine, chemical, military, wind turbine, medical equipment, and many other industries.
By virtue of expertise team, advanced manufacturing technologies and strict quality management system, LYJW takes the lead in the R&D of slewing bearings, which are designed with reasonable construction, light weight, good load carrying capacity and high versatility. The bearings’ diameters range from 200 to 15000mm and the accuracy covers PO, P6 and P5 class. Now, we can manufacture CCS, ABS, BV, GL and other certified bearings.
We adhere to the business principle of “Quality and Integrity” and we’ll keep providing outstanding bearings and superior services to serve global customer.
