Knuckle Boom Crane Slewing Bearing

Knuckle boom crane is a kind of hoisting machinery, which is a kind of machinery that performs cyclic and intermittent movement.

The slewing mechanism on the knuckle-boom crane is used to rotate the boom, and is composed of driving drive and slewing bearing .

Knuckle boom crane has strict requirements on the bearing capacity of the slewing bearings. The slewing bearings not only have to bear the weight of the crane lifting objects, but also the tipping moment of the crane boom.

Knuckle boom crane slewing bearing-structure type

1. Four contact ball slewing bearings

2. Cross roller slewing bearings

3. Double row ball slewing bearings

4. Triple row roller slewing bearings

5. Ball and roller combined slewing bearings;

Knuckle boom crane slewing bearing ------Technical Data:

1. Inner ring and outer ring material: 42CrMo, 50Mn

2. Steel ball or roller material: Gcr15, Gcr15SiMn, 304 Stainless steel, 440 Stainless steel

3. Precision: P0. P6. P5.

4. Outside diameter: 1000~17000mm

5. Cage/retainer: Nylon or Steel Cage

6: Seal: NBR, Oil resistant rubber, Viton, Skeleton oil seal