CAT 314-8647 BEARING-SLV-GD

CAT 314-8647 GD is a Caterpillar general-duty straight-tube sleeve bearing, suitable for pins, connecting rods, and other components in excavators, loaders, and other construction machinery. It is used for friction reduction, positioning, and bearing radial loads. The following is raw data and does not include replacement parts information.

Core Technical Parameters (Raw Data)

Item Details
Basic Attributes
Model 314-8647 GD, Type: General Purpose Straight Sleeve Bearing, Material: Steel Back + Tin Bronze (CuSn8), Single Weight: 0.56 kg, Operating Temperature: -30℃ to +110℃, Suitable Radial Load ≤80 kN, Suitable Shaft Diameter: 50 mm, Lubrication Method: Grease Lubrication, Fit Tolerance: H7, Corrosion Resistance: ≥120 hours Salt Spray, Steel Back Material: Q235, Liner Thickness: 2 mm, Bonding Strength: ≥140 MPa, Fitting Clearance: 0.012-0.025 mm

Key Dimensions (Metric/Imperial): Inner Diameter: 50 mm (1.969 in), Outer Diameter: 65 mm (2.559 in), Overall Length: 45 mm (1.772 in), Steel Back Thickness: 3 mm, Chamfer: C1.0 mm, Inner Diameter Tolerance: +0.018/-0.00 mm, outer diameter tolerance + 0.012/-0.01 mm, length tolerance + 0.08/-0.05 mm, roundness ≤0.02 mm, surface roughness Ra≤0.8 μm

Performance Parameters: Liner hardness HB 80-100, steel backing tensile strength ≥375 MPa, coefficient of friction ≤0.07 (grease lubrication), compressive strength ≥240 MPa, shear strength ≥75 MPa, coefficient of thermal expansion 17×10^-6/℃, oil-free lubrication limiting speed 120 rpm, grease lubrication limiting speed 450 rpm

Structure and Adaptability Characteristics:

Composite structure design: The steel backing provides rigid support, and the tin bronze liner has excellent friction reduction and embedding properties, suitable for low-speed, heavy-load, and oscillating conditions, effectively reducing pin wear and extending component life.

Universal Compatibility Features: The straight-tube, flangeless design is compatible with the articulation points of various Caterpillar models, facilitating easy installation and suitable for light to medium loads and non-continuous operation. It meets industry-standard durability.

Precise Clearance Control: Strict dimensional tolerances and clearance design ensure a tight fit with pins and mounting brackets after installation, reducing impact and vibration, ensuring smooth operation, and minimizing the risk of abnormal noise.

Compatible Models and Applications:

Excavators: Boom pins, stick pins, and bucket pin sleeves for models 312D, 313D, and 315D, capable of withstanding heavy loads and swaying, suitable for light to medium workloads such as municipal engineering and small-scale earthmoving.

Loaders: Boom articulation pins and rocker arm pin sleeves for models 938K and 950K, suitable for frequent lifting and turning operations, reducing friction and improving work efficiency.

Others: Compatible with the working device articulation points of some Caterpillar mini bulldozers and graders, meeting the wear resistance requirements of light to medium loads and harsh working conditions. Installation and Maintenance Points (Original Data)

Installation: Clean the bearing and mounting base, ensuring they are free of oil and metal shavings. Inspect the bearing for deformation and cracks, and check for any detachment or damage to the liner.

Cold press installation (pressing force ≤ 60 kN). Do not hammer or strike. Ensure an interference fit (interference 0.010-0.020 mm). Ensure the bearing is properly seated without misalignment.

After installation, check the inner diameter and roundness. Apply NLGI 2 lithium-based grease and run for 20 minutes, monitoring for any abnormal heating or noise.

Maintenance: Check the bearing wear and lubrication condition every 800 hours. Replace the bearing immediately if the liner wear exceeds 0.4 mm or the clearance exceeds 0.04 mm.

Replenish grease regularly. Use specialized tools during disassembly to avoid prying, which could deform the bearing or damage the liner.