CAT 5L-3496 SLEEVE

CAT 5L-3496 is a Caterpillar genuine gray cast iron locating sleeve, suitable for positioning crankshafts or camshafts in medium and heavy-duty engines. It is used to fix the axial position of components, transmit torque, and withstand radial loads. The following are core original specifications and application information; replacement parts (Cat®) are not included.

Core Technical Parameters

Item Details
Part Model: CAT 5L-3496 (SLEEVE)

Product Type: Engine positioning sleeve, suitable for crankshaft front/rear end or camshaft positioning, providing axial positioning and radial support functions.

Material: Gray Flake Iron, grade HT250, tensile strength ≥250 MPa, hardness HB 190–240, excellent vibration damping and wear resistance.

Surface Treatment: Precision machining of inner and outer diameters, surface roughness Ra ≤ 0.8 μm, strict dimensional tolerance control, suitable for high-precision assembly.

Key Dimensions: Inner diameter 50 mm, outer diameter 65 mm, length 80 mm, keyway width 8 mm, depth 3 mm, suitable for standard flat key torque transmission.

Single Weight: Approx. 0.65 kg (1.43 lbs)

Operating Performance: Operating temperature -20℃ ~ +150℃, suitable for engine oil, coolant, and other media; no sealing function, used only for positioning and support.

Matching Requirements: Inner bore interference fit with shaft (interference 0.010–0.020 mm), outer diameter clearance fit with mounting hole (clearance 0.020–0.030 mm).

Structure and Core Characteristics:

Material Compatibility: Gray cast iron has good vibration damping properties, reducing vibration transmission during engine operation, while its wear resistance meets long-term use requirements, suitable for high-load engine conditions.

Precision Positioning Structure: Keyway design ensures synchronous rotation with the shaft, transmitting torque; strict dimensional tolerances of the inner bore and outer diameter ensure axial positioning accuracy, preventing axial movement of components and ensuring the synchronization of the engine’s valve train and fuel supply system.

Installation Stability: The interference fit design ensures a tight fit between the sleeve and shaft, preventing loosening during operation; the outer diameter clearance fit facilitates installation and disassembly, while also allowing space for thermal expansion and contraction to prevent jamming due to temperature changes.

High versatility: Compatible with a wide range of Caterpillar medium and heavy-duty engines, featuring a simple and reliable structure, low maintenance costs, and easy replacement.

Compatible Engine Models and Application Scenarios

Compatible Engine Models: Cat® medium and heavy-duty diesel engines such as 3306, 3406B, 3406C, 3406E, 3408, 3412, C9, C11, C13, C15, and C18…

Compatible Equipment Types: Excavators, loaders, generator sets, marine engines, industrial engines, etc.

Core Applications: Used for crankshaft front-end positioning (compatible with pulleys and vibration dampers), crankshaft rear-end positioning (compatible with flywheels), or camshaft positioning to fix the axial position of components, transmit torque, ensure synchronous operation of all moving parts of the engine, and prevent component interference or damage caused by axial movement.