Description
CAT 380-7375 General Duty Straight Sleeve Bearing (Bushing)
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The CAT 380-7375 is a genuine Caterpillar straight sleeve bearing, suitable for the articulated parts of loaders, excavators, and other equipment. It is used for radial load bearing, friction reduction and wear resistance, and positioning and guiding. It is compatible with models such as 320D/320GC and 950M/962M, and can withstand heavy loads and vibration conditions.
Core Technical Parameters
Item Details
Part Model: CAT 380-7375 Sleeve Bearing
Material: Steel backing + copper-based alloy / sintered bronze, surface optional molybdenum disulfide coating, self-lubricating and friction-reducing, hardness HRC 55-60, suitable for heavy-duty conditions
Key Dimensions: Inner diameter approx. 60mm, outer diameter approx. 75mm, length approx. 80mm, wall thickness 7.5mm, chamfer at both ends r≈2mm, suitable for 60mm diameter pins
Compatible Models: Mainstream compatible with 320D/320GC excavators, 950M/962M loaders, 420F2 loaders, etc., used in boom/stick hinge points, cylinder lugs, connecting rod bearing seats, etc.
Performance Characteristics: One-piece molding, high load-bearing capacity, resistant to oil and dust, -40℃ to Stable operation at 120℃, low wear rate when using grease, suitable for high-frequency reciprocating and low-speed rotating conditions in engineering machinery.
Core Functions and Structure
Load Bearing and Friction Reduction: Serving as an intermediate support between the pin and the mounting base, it bears radial loads and reduces relative motion resistance of components through sliding friction, thus reducing wear between the pin and the machine body and extending component life.
Positioning and Guiding: Precise inner and outer diameter dimensions ensure the coaxiality of the pin within the mounting base, preventing uneven wear and ensuring the movement accuracy of the hinged parts.
Lubrication Optimization: Some sections have internal lubrication grooves and oil holes to store grease, forming an oil film, reducing dry friction and lowering maintenance frequency.
Installation and Maintenance Points
Installation Specifications: Before installation, clean the mounting base hole, bushing, and pin surface to remove oil, rust, and impurities; check that the bushing is free from deformation and cracks, and that the mounting base hole dimensional tolerances meet H7 requirements.
Use special tooling for cold pressing installation; do not directly strike to prevent bushing deformation; after installation, check that the end face fits snugly against the mounting base without gaps.
Before installing the pin, apply lithium-based grease to ensure adequate lubrication of the sliding surfaces. After installation, check rotating parts for any jamming or abnormal noise.
Maintenance Recommendations: Every 800-1000 working hours, check the bushings for wear and looseness, and ensure the inner hole coating is intact. Replace the bushing immediately if wear exceeds 0.5mm.
For heavy-load/dusty conditions, add grease every 200 hours; for light-load conditions, add grease every 500 hours to avoid premature wear caused by dry friction.
