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.

Double-row ball slewing ring bearing details 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 Applications Excavator Crawler crane Port machinery Amusement facilities Three types of double-row ball slewing ring bearing
Double-row Ball Slewing Ring with Same Diameter Balls, with Internal Gear
Double-row Ball Slewing Ring with Same Diameter Balls, with External Gear
Double-row Ball Slewing Ring with Same Diameter Balls, with No Gear Structure of double-row ball slewing ring bearing
1 Inner Ring
2 Outer Ring
3 Seal
4 Spacer
5 Ball/Roller Seals

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.

Raceway

The surface of bearing raceways are quenched, whose quenching hardness is HRC55-62, ensuring its effective hardening depth.

Toothing

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.

Tags Slew bearings
double-row ball bearings
industrial bearings
turntable rings
manipulator bearings
slew ring bearings wholesale