CAT 247-9694 BALL

CAT 247-9694 is a Caterpillar genuine radial self-lubricating spherical plain bearing (spherical bearing), suitable for hydraulic cylinder lugs, connecting rod hinges, and other parts requiring angular compensation. The following is structured raw data, excluding replacement parts information.

Core Technical Parameters (Raw Data)

Item Details
Basic Attributes
Model 247-9694, type is radial spherical sliding bearing (outer ring + ball core, ball core with self-lubricating layer), outer ring material 42CrMo, ball core material 20CrMnTi+PTFE self-lubricating film, single weight 0.85 kg, operating temperature -40℃ to +150℃, lubrication method is self-lubricating + supplementary lubrication, suitable for medium and low speed, medium and heavy load, angular displacement ≤±12° working conditions, used in hydraulic cylinder lugs, connecting rod hinge pins, etc.

Key Dimensions
Inner diameter 50 mm (1.969 in), outer diameter 70 mm (2.756 in), width 25 mm (0.984 in), spherical radius 25 mm, clearance between ball core and outer ring 0.015-0.030 mm, outer ring outer diameter tolerance h6, ball core inner hole tolerance H7, chamfer at both ends 1×45°
Compatible Models and Parts: Compatible with boom cylinder lugs, stick cylinder lugs, and steering linkage joints of Cat 308 and 309 excavators, and 420F2 and 430F2 loaders. One piece per part. Bears radial load + slight bidirectional axial load. Suitable for angular displacement ≤ ±12° and speed ≤ 300 r/min.

Performance Parameters: Radial load capacity ≥ 120 kN, coefficient of friction ≤ 0.06 (self-lubricating), wear rate ≤ 0.003 mm/1000 hours, fatigue life ≥ 8000 hours, core hardness HRC 58-62, outer ring hardness HRC 52-56, self-lubricating film thickness 0.2-0.3 mm, film adhesion ≥ 10 MPa

Structural and Performance Advantages:
Self-lubricating spherical structure: The PTFE self-lubricating film on the core surface reduces friction, eliminating the need for frequent lubrication. Suitable for hinge joints without continuous lubrication, and can compensate for ±12°. Within a certain angular deviation range to avoid jamming.

High-strength material combination: The outer ring is made of 42CrMo with quenching and tempering treatment, and the ball core is made of 20CrMnTi with carburizing and quenching, possessing high rigidity and impact resistance, suitable for the frequent start-stop and impact load conditions of engineering machinery.

Precise clearance control: The clearance between the ball core and the outer ring is 0.015-0.030 mm, balancing flexibility and load-bearing stability, preventing vibration caused by excessive clearance and jamming caused by insufficient clearance.

Original factory compatibility guarantee: Manufactured by Caterpillar, with precise size and installation position matching. The self-lubricating film is firmly bonded to the ball core, eliminating the risk of detachment and avoiding damage to the cylinder clevis and connecting rod due to insufficient angle compensation.

Installation and Maintenance Points (Original Data)

Installation Procedure: Clean the bearing, clevis hole, and hinge pin surfaces. The clevis hole tolerance is H7. Press the bearing into the clevis hole using the cold pressing method (interference 0.010-0.020 mm). After installation, check that the ball core rotates freely without jamming, and the clearance with the hinge pin is 0.015-0.030 mm.

Maintenance Cycle: Check bearing rotation and wear every 500 hours. Add grease (Cat 1U-8886 recommended) every 2000 hours. Check ball core wear every 6000 hours. Replace the bearing when the wear on the inner hole of the ball core exceeds 0.10 mm.

Common Troubleshooting: Wear of the self-lubricating film will increase friction, requiring timely bearing replacement; a loose outer ring will cause uneven bearing load, requiring re-pressing or replacement of the clevis seat; impurities entering will cause scratches on the ball core, requiring cleaning and bearing replacement.