CAT 536-0694 50mm Inner Diameter Bushing

CAT 536-0694 is a Caterpillar genuine steel-based copper SEM bushing, suitable for articulated parts of engineering machinery, used to reduce friction and absorb shock. The following is structured raw data, excluding replacement parts information.

Core Technical Parameters (Raw Data)

Item Details
Basic Attributes
Model 536-0694, type is bimetallic composite bushing (steel back + copper alloy layer), steel back material Q235B, copper alloy layer material CuPb10Sn10 (tin bronze), steel back thickness 2 mm, copper layer thickness 3 mm, single weight 0.58 kg, working temperature -40℃ to +120℃, lubrication method is oil lubrication/grease lubrication, suitable for medium and low speed, medium and heavy load, oscillating/rotating conditions, used in hinge pins, drive shafts, etc.

Key Dimensions
Inner diameter 50 mm (1.969 in), outer diameter 60 mm (2.362 in), length 70 mm (2.756 in), chamfer at both ends 1.5×45°, steel back outer diameter tolerance h6, copper bushing inner diameter tolerance H7, clearance with shaft 0.015-0.030 mm, interference fit with bearing housing 0.010-0.020 mm
Compatible Models and Parts: Compatible with boom articulation pins, stick pins, and steering knuckle pins of Cat 305.5 and 306 excavators, and 420F2 and 430F2 loaders. One piece per part. Bears radial load + slight impact load. Suitable for swing angles ≤ ±30° and speeds ≤ 500 r/min.
Performance Parameters: Radial load capacity ≥ 80 kN, coefficient of friction ≤ 0.05 (oil lubrication), wear rate ≤ 0.005 mm/1000 hours, fatigue life ≥ 8000 hours, copper alloy layer hardness HB 80-100, steel backing tensile strength ≥ 375 MPa
Structural and Performance Advantages:
Bimetallic composite structure: Q235B steel backing provides high strength and rigidity, CuPb10Sn10… The copper alloy layer possesses excellent wear resistance and embedding properties, absorbing impurities and reducing wear on shafts and bushings, making it suitable for harsh working conditions in engineering machinery.

Precise dimensional tolerances: Inner and outer diameter tolerances are controlled within ±0.01 mm, ensuring precise fit with hinge pins and bearing housings, preventing loosening and uneven loading, and improving equipment operational stability.

High load-bearing capacity and impact resistance: The copper alloy layer can withstand impact loads, making it suitable for frequently stressed parts such as booms and sticks, reducing vibration and noise, and extending the service life of pins and bushings.

Original manufacturer compatibility guarantee: Manufactured by Caterpillar, the copper alloy layer and steel backing have a bonding strength ≥200 MPa, eliminating the risk of delamination, ensuring strong compatibility, and avoiding jamming failures caused by dimensional deviations.

Installation and Maintenance Points (Original Data)

Installation Procedure: Clean the surfaces of the bushing, shaft, and bearing housing. The bearing housing bore tolerance is H7. Press the bushing into the bearing housing using the cold pressing method (interference 0.010-0.020 mm). After installation, check the inner bore roundness to be ≤0.01 mm and the clearance with the shaft to be 0.015-0.030 mm, ensuring no jamming.

Maintenance Cycle: Check the lubrication status every 300 hours, replenish grease (Cat 1U-8886 recommended) every 1500 hours, and check the bushing wear every 6000 hours. Replace the bushing when the inner bore wear exceeds 0.1 mm.

Common Troubleshooting: Insufficient lubrication can cause overheating and wear of the bushing, requiring inspection of the lubrication system; impurities can cause scratches on the copper layer, requiring cleaning and replacement of the bushing; insufficient interference can cause the bushing to loosen, requiring re-pressing or replacement of the bearing housing.