7j-3297 High Performance Spare Parts --Bearing Designed for Drilling Machines

Engineered specifically for the demanding environments of construction machinery, this spherical plain bearing is manufactured from premium bearing steel. Utilizing precision machining and a protective black oxide finish, it delivers exceptional wear resistance, superior load-bearing capacity, and reliable performance in heavy-duty transmission systems.

Key Features & Advantages:

• Premium Material for Maximum Durability:

  Constructed from high-purity bearing steel (e.g., GCr15 / AISI 52100), this bearing offers excellent hardenability and fatigue strength. Compared to standard carbon steel, its dense internal structure and low impurity content ensure stable physical properties under immense impact loads and alternating stress, significantly extending service life and reducing downtime.

• Precision Machining for Smooth Operation:

  Processed via advanced CNC machining and fine grinding, the inner and outer spherical surfaces achieve high accuracy with strictly controlled surface roughness. This ensures smooth movement during oscillation and rotation, minimizes starting friction and noise, and enhances the overall precision of mechanical transmissions.

• Black Oxide Treatment for Enhanced Protection:

  The surface undergoes a standard black oxide treatment, forming a dense, corrosion-resistant layer. This finish not only provides a professional appearance but also increases surface hardness and acts as an excellent lubricant reservoir, aiding in oil film formation during initial operation to minimize early-stage wear.

• Self-Aligning Design:

  The unique spherical sliding design allows for angular misalignment. It effectively compensates for shaft-to-housing alignment errors and deflection under heavy loads, preventing premature failure caused by edge stress concentration.

• Heavy-Duty Load Capacity:

  Designed to withstand heavy radial loads and unidirectional axial loads. Its robust structure makes it ideal for low-speed, high-load applications involving oscillatory motion.

Typical Applications:

• Hydraulic Systems: Connecting rods and cylinder ears.

• Chassis & Undercarriage: Track roller connections for excavators and bulldozers.

• Working Devices: Pivot points for booms, arms, and buckets.

• Steering Linkages: Critical joints in heavy truck steering mechanisms.

Technical Specifications (Reference):

• Material: Bearing Steel (GCr15 / AISI 52100)

• Hardness: HRC 58-62 (Heat Treated)

• Surface Finish: Black Oxide Coating

• Lubrication: Equipped with grease nipple holes (depending on model)

• Operating Temperature: -30°C to +120°C