CAT 616-5048 Sleeve Bearing

CAT 616-5048 is a sleeve bearing for Caterpillar engines/transmission systems. It is suitable for C13/C15 engine camshafts, 336D2 excavator swing gearbox input shafts, etc. It is used to support rotating shafts, reduce friction and bear radial loads. It is often used in conjunction with 1J-0581 bearing caps and O-rings to ensure stable operation of the transmission system. The following is structured technical and application information:

Core Technical Parameters

Item Details
Basic Attributes
Model 616-5048, Sleeve Bearing (Busket/Sliding Bearing), Material: Tin Bronze (ZCuSn10Pb1, Hardness HB80-100, Tensile Strength ≥200 MPa, Wear Resistance, Good Thermal Conductivity), Surface Graphite Inlay (Self-Lubricating, Friction Coefficient 0.08-0.12), Operating Temperature: -40℃ to +150℃, Single Weight: Approximately 0.8 kg, Suitable for rotating parts such as engine camshafts and rotary gearbox input shafts, used to support rotating shafts, reduce friction, and bear radial loads, suitable for medium-low speed (≤1500 rpm) and medium-low load (≤20 MPa) conditions

Key Dimensions
Inner Diameter: 80 mm (Tolerance 0/-0.015 mm), Outer Diameter: 95 mm (Tolerance +0.015/0 mm), Total Length: 50 mm, Wall Thickness: 7.5 mm The inner bore surface roughness Ra≤0.4 μm is specified. The inner ring tolerance is h6 (0/-0.015 mm), and the outer ring tolerance is H7 (+0.030/0 mm). The chamfer is 15°×1 mm, and the coaxiality is ≤0.02 mm. Compatible with Cat C13/C15 engines (camshaft bearing housing sleeve bearing), 336D2 excavators (slewing gearbox input shaft support sleeve), 980M loaders (gearbox output shaft sleeve bearing), and D8T bulldozers (final drive input shaft sliding bearing). It is used with 1J-0581 bearing caps and O-rings (616-5049).

Assembly fit: The inner bore and shaft have a transition fit (clearance 0.005-0.012 mm), and the outer ring and bearing housing have an interference fit (interference 0.008-0.015 mm). It is compatible with 80 mm diameter shafts. The shaft surface must be chrome-plated (thickness 0.05-0.1 mm). The bearing housing bore must be precision-bored (Ra≤1.6 μm) and polished (mm).

Installation and Maintenance Points:

Before installation, clean the inner and outer surfaces of the bearing, the journal, and the bearing housing bore. Check for scratches, porosity, and cracks. Measure dimensions and fit tolerances to ensure compliance. Apply a small amount of grease to the bearing housing bore for easy installation.

Use a special installation tool for cold pressing. Do not strike the end face to prevent bearing deformation or damage to the surface graphite layer. After installation, check for radial runout ≤0.02 mm to ensure smooth and unobstructed rotation.

Maintenance and Replacement: Check bearing wear and lubrication every 800 hours. If the inner bore wear exceeds 0.1 mm or grooves appear, replace immediately. It is recommended to replace the bearing simultaneously with the bearing cap and O-ring to ensure support and sealing performance.