CAT 584-6583 Straight Sleeve Bearing

CAT 584-6583 is a Caterpillar steel-backed aluminum-based straight sleeve bearing. It is primarily designed for connecting rod bushings, gearbox shift fork shafts, or hydraulic cylinder pins in Caterpillar 320D/336D excavators, 966K loaders, and 140M graders. It is used to bear radial loads, reduce friction, and limit radial runout. It is compatible with Cat C6.4/C7.1/C9 engines and Cat 345B/C/D hydraulic systems, ensuring smooth operation of components under low-speed, heavy-load conditions, preventing pin wear, increased clearance, or seal failure. It is suitable for oil/grease lubrication, with a rated radial load ≥60 kN and a fatigue life ≥8000 hours. The following is structured technical and application information:

Core Technical Parameters

Item Details
Basic Attributes
Model 584-6583, Straight Sleeve Bearing (Steel Back Aluminum Base), suitable for 320D/336D excavator connecting rod bushings, 966K loader gearbox shift fork shafts, 140M grader hydraulic cylinder pins, material is steel back + aluminum-tin alloy (steel back Q235, aluminum-tin alloy layer thickness 0.3-0.5 mm, hardness HB 25-35), operating temperature -40℃ to +120℃, single weight approximately 0.32 kg, suitable for SAE 15W-40 diesel engine oil or extreme pressure lithium-based grease lubrication, rated radial load ≥60 kN, suitable for low-speed heavy-load conditions (≤1000 rpm), fatigue life ≥8000 hours, used to bear radial loads, reduce friction, and limit radial runout

Key Dimensions
Inner Diameter 50.00 mm (tolerance) H7 (+0.030/0 mm), outer diameter 60.00 mm (tolerance h6, 0/-0.016 mm), length 70.00 mm (tolerance ±0.15 mm), wall thickness 5.00 mm, inner hole surface roughness Ra≤0.4 μm, clearance with pin 0.04-0.06 mm, suitable for 50 mm diameter pins (tolerance h7, 0/-0.030 mm)

Material and Process: Q235 steel backing → stamping → surface treatment → aluminum-tin alloy powder metallurgy sintering → rolling → precision boring of inner hole → deburring → rust prevention treatment. The aluminum-tin alloy layer contains 20% tin, providing good embedding, conformability, and anti-galling properties, suitable for low-speed, heavy-load, reciprocating, or oscillating working conditions, preventing pin and bushing jamming.

Compatible Models: Cat 320D/336D excavators (C6.4/C7.1) This product is used in the following applications: 966K/972M loader (Cat 345D hydraulic system), 140M/160M grader (C9 engine), and 420F backhoe loader (C6.6 engine). It is used in connecting rod bushings, gearbox shift fork shafts, hydraulic cylinder pins, steering knuckle pins, etc., to bear radial loads, reduce friction, and ensure smooth operation of components. Assembly and fit: Compatible with 50 mm diameter pins (tolerance h7, 0/-0.030 mm), bearing outer diameter and mounting seat fit tolerance H7 (+0.030/0 mm), mounting seat surface roughness Ra≤1.6 μm, flat end face without deformation, and after installation, the clearance between the bearing and pin should be controlled at 0.04-0.06 mm. It is compatible with M16×1.5 bolts (grade 10.9, preload torque 50-60). N·m) Installation and Maintenance Points: Before installation, clean the bearing, pin, and mounting base. Check for scratches, rust, and cracks on the surfaces. Measure the bearing inner diameter and pin diameter, and the bearing outer diameter and mounting base inner diameter to ensure the fit meets requirements. The mounting base needs to be bored to ensure the inner diameter tolerance and surface roughness meet standards.

Use the cold-fit method for installation. Use a pressure block to evenly press the bearing into the mounting base. Do not directly strike the bearing end face with a hammer to prevent alloy layer peeling. After installation, check the fit clearance and adjust it to 0.04-0.06 mm using shims to ensure the components are free from jamming and move freely.

Maintenance Recommendations: Check the bearing wear every 2000 hours. If the inner bore wear is >0.15 mm or alloy layer peeling or exposed steel backing occurs, replace immediately. Regularly add grease (for grease lubrication) or change the engine oil (for oil lubrication) to maintain adequate lubrication and prevent accelerated bearing wear due to poor lubrication, which can affect the component’s fit accuracy and load-bearing capacity.