CAT 210-3099 80mm Length Split Sleeve

CAT 210-3099 is a Caterpillar internal spline bushing, adapted to the spline connection between the gearbox output shaft and the drive axle input shaft. Its core function is to transmit torque, compensate for shaft coaxiality deviations, and protect the spline tooth surface. It is commonly used in the transmission systems of excavators, loaders, etc., and is a key transition component for power transmission. The following is structured technical and application information:

Core Technical Parameters

Item Details
Basic Attributes
Model 210-3099, Type: Internal tooth spline bushing (involute spline), Material: 20CrMnTi (carburized and quenched, tooth surface HRC58-62, core HRC30-40), Single weight approximately 1.2 kg, Suitable temperature: -40℃ to +120℃, Lubrication method: Oil lubrication (compatible with Cat DEO-ULS 15W-40), Surface treatment: Oxidation blackening (salt spray resistance ≥480 h)

Key Dimensions
Inner diameter: 60 mm (spline parameters: module 2.5, number of teeth 24, pressure angle 30°, tooth flank clearance 0.03-0.05 mm), Outer diameter: 85 mm (tolerance h6, 84.97-85.00 mm), Length: 70 mm (tolerance ±0.1 mm), Effective spline length: 50 mm, chamfered ends 2×45°, keyway width 10 mm (tolerance H9)

Compatible Models and Parts: Compatible with Cat 320D/323D excavator boom gearbox output shaft, 950GC loader gearbox – drive axle connecting shaft, D6K bulldozer final drive input shaft, 1 piece per shaft, used for torque transmission (maximum transmitted torque 800 N·m), compensating for shaft system installation coaxiality deviation (≤0.1 mm), protecting spline tooth surfaces and reducing wear.

Performance Parameters: Maximum transmitted torque 800 N·m, allowable speed 3000 rpm, spline tooth surface contact stress ≤1200 MPa, bending fatigue strength ≥500 MPa, allowable shaft relative radial displacement ≤0.2 mm

Structural and Performance Advantages:
Highly efficient torque transmission: Involute spline tooth profile design, large tooth surface contact area, uniform torque transmission, avoiding local stress concentration, suitable for power transmission under heavy load conditions.

Deviation Compensation Capability: The spline fit clearance can compensate for shaft installation coaxiality deviations and vibration displacement during operation, reducing spline tooth surface impact and extending the life of transmission components.

Tooth Surface Wear Resistance: Made of 20CrMnTi material, carburized and quenched, resulting in high tooth surface hardness and strong wear resistance. Anodized blackening surface treatment enhances rust prevention, making it suitable for harsh working conditions.

Easy Installation: The internal spline and shaft end spline precisely mate, requiring no additional fasteners. Reliable positioning and high installation efficiency reduce the risk of assembly errors.

Installation and Maintenance Points: Before installation, clean the spline shaft, bushing internal teeth, and installation area. Check the spline tooth surface for burrs and dents. Use the hot fitting method (heating temperature 120-150℃, holding for 30 min) or the cold pressing method (pressure 10-12 MPa) for installation, ensuring the bushing end face fits snugly against the shaft shoulder. After installation, the spline fit clearance should be 0.03-0.05 mm.

Maintenance every 2000 hours: Inspect the spline tooth surface wear. If the wear exceeds 0.1 mm or pitting or peeling occurs, replace immediately. Regularly check the lubricating oil level and cleanliness to prevent impurities from entering the spline mating surfaces and accelerating wear.

Prioritize original equipment manufacturer (OEM) parts. Aftermarket parts may have insufficient spline tooth profile precision, substandard material heat treatment, etc., which can easily lead to premature spline tooth surface wear, torque transmission failure, and transmission system malfunctions.