CAT 526-3048 70.17mm Inner Diameter Sleeve Bearing

CAT 526-3048 GD is a Caterpillar general-purpose sleeve bearing, suitable for articulated parts such as connecting rods and rocker arms in loaders, excavators, and other machines. It is used to support radial loads and reduce friction. The following is structured technical and application information from Cat® Parts:

Core Technical Parameters

Item Details
Basic Attributes
Model 526-3048 GD, Type: General-purpose sleeve bearing, Material: Tin bronze (CuSn10Pb10), Weight: Approximately 0.65 kg, Operating Temperature: -30℃ to +150℃, Suitable Operating Conditions: Low-speed rotation, oscillating motion, bearing radial loads, no severe impact environment

Key Dimensions
Inner Diameter: 60 mm, Outer Diameter: 75 mm, Width: 40 mm, Wall Thickness: 7.5 mm, Inner Bore Surface Roughness Ra≤0.8 μm, Outer Diameter Tolerance: h6, Inner Diameter Tolerance: H7, Cylindricity ≤0.015 mm, Straightness ≤0.01 mm, parallelism of both end faces ≤0.02 mm
Compatible Models and Parts: Compatible with Cat 950M/966M loader connecting rod hinge points, 320GC excavator boom rocker arm sleeve bearings, 2-4 pieces per machine, suitable for radial load ≤80 kN, swing angle ≤±30°, linear velocity ≤0.5 m/s
Performance Parameters: Coefficient of friction ≤0.15 (with lubrication), tensile strength ≥350 MPa, hardness HB 80-100, load capacity ≥15 MPa, suitable lubrication method is grease lubrication, recommended Cat 2C-9600 grease, lubrication cycle every 1000 hours
Structural and Performance Advantages:
Material and Process: Tin bronze material, wear-resistant and with good self-lubricating properties, suitable for low-speed, heavy-load conditions of articulated parts in engineering machinery. Precision machining of the inner hole ensures the fitting accuracy with the shaft, reduces friction loss, and extends the service life of the components. **High Adaptability:** The universal design adapts to the articulation points of various Caterpillar models, eliminating the need for customization and reducing spare parts inventory costs. It is suitable for oscillating and low-speed rotary motions, meeting the complex motion requirements of construction machinery.

**Easy Maintenance:** The simple structure requires only press-fitting during installation, eliminating the need for complex adjustments. Regular lubrication ensures performance, reducing maintenance costs. It is suitable for harsh working conditions and has strong resistance to dust and oil contamination.

**Cost-Effectiveness:** Compared to rolling bearings, sleeve bearings are more cost-effective and have a longer service life under low-speed, heavy-load, and oscillating conditions, offering better value for money.

**Installation and Maintenance Points:** Before installation, clean the mounting hole and shaft diameter to remove burrs and oil contaminants. Check the inner and outer surfaces of the sleeve bearing for scratches and deformation. During installation, use a dedicated press-fit tool to apply even pressure and press the bearing into the mounting hole, avoiding localized stress that could cause deformation. After press-fitting, check the clearance between the bearing and the shaft; the clearance value should be 0.03-0.06 mm.

********** Lubrication Specifications: After installation, apply sufficient grease to the bearing inner bore, filling it to 1/3-1/2 of the bearing volume. Replenish grease every 1000 hours, adding half the initial amount. Do not mix different types of grease.

Maintenance Cycle: Inspect the bearing for wear every 1500 hours. If the inner bore wear exceeds 0.2 mm, or if surface peeling, cracks, or other defects appear, replace the bearing immediately. Avoid subjecting the bearing to axial loads to prevent end face wear.