02 series Double row ball slewing bearing

Structural characteristics, performance, and scope of application
The double row ball slewing bearing has three races. The steel ball and the spacer block can be directly discharged into the upper and lower raceways. According to the force condition, two rows of steel balls with different diameters are arranged. This open assembly is very convenient, the upper and lower circular races have a bearing angle of 90° and can withstand large axial forces and tipping moments. When the radial force is greater than 0.1 times the axial force, the raceway must be specially designed. The double volleyball type slewing bearing has relatively large axial and radial dimensions and is structurally fastened. It is especially suitable for loading and unloading machines such as tower cranes and truck cranes that require medium and large diameters.

02 Series JB/T 2300-1999

(1)–Slewing bearing structure type code

  • 02: Double row ball Type

(2)–Transmission type code 

  • 0: No tooth type, 
  • 1: Small modulus external gear type 
  • 2: Large modulus external tooth type, 
  • 3: Small modulus internal tooth type 
  • 4: Large modulus external tooth type

(3)–The diameter of the upper row of rolling elements, mm
(4)–The diameter of the center of the upper row of raceways, mm
(5)–Installation type code

  • 0: Standard type without stop groove
  • 1: Standard type with a stop groove
  • 2: Special type

(6)–Mounting hole type code

  • 0: Inner and outer ring mounting holes are through holes
  • 1: Inner and outer ring mounting holes are screw holes
  • 2: Outer ring mounting holes are through holes, inner ring is screw holes
  • 3: Outer ring The mounting hole is a screw hole, and the inner ring is a through hole type designation

Model tag example:
Double row ball type, large modulus internal gear, rolling body diameter 40mm, raceway center diameter 1250mm, standard type with a stop groove, inner and outer ring mounting holes are through-hole connection, the product model is marked as follows:
Slewing bearing 024·40·1250·10
JB/T 2300-1999


Note:
1. n1 is the number of lubricating oil holes, evenly distributed: oil cup M10×1 JB/T7940.1-JBT7940.2

2. The mounting holes n-dn1 and n-dn2 can be changed to screw holes; the tooth width b can be changed to H-h.

3. The circumferential force of the gear in the form is the maximum circumferential force, and the rated circumferential force is 1/2.

4. The internal tooth repairing coefficient is 0.2.



Note:
1. n1 is the number of lubricating oil holes, evenly distributed: oil cup M10×1 JB/T7940.1-JBT7940.2

2. The mounting holes n-dn1 and n-dn2 can be changed to screw holes; the tooth width b can be changed to H-h.

3. The circumferential force of the gear in the form is the maximum circumferential force, and the rated circumferential force is 1/2.

4. The external tooth repairing coefficient is 0.1.


Note:
1. n1 is the number of lubricating oil holes, evenly distributed: oil cup M10×1 JB/T7940.1-JBT7940.2

2. The mounting holes n-dn1 and n-dn2 can be changed to screw holes; the tooth width b can be changed to H-h.

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