CAT 6V-5116 BEARING A

The CAT 6V-5116 is a Caterpillar double-row tapered roller bearing assembly, commonly used in the gearboxes, final drives, or rear axle differentials of loaders and excavators. It bears radial and bidirectional axial combined loads and is compatible with Cat 950H/966H loaders, 320D/323D excavators, and other models. It is a core component for the stable operation of the transmission system. The following is structured technical and application information:

Core Technical Parameters

Item Details
Basic Attributes
Model: 6V-5116, Type: Double row tapered roller bearing assembly, Material: Inner/Outer ring 52100 bearing steel, Rollers: 20CrMnTi, Cage: Phenolic resin, Weight: Approx. 4.2 kg, Operating Temperature: -40℃ to +120℃, Hardness: Inner/Outer ring HRC60-64, Rollers: HRC58-62, Rated Speed: 3200 rpm (grease lubrication)

Key Dimensions
Inner Diameter: 80 mm (Tolerance 0 to -0.015 mm), Outer Diameter: 140 mm (Tolerance +0.015 to +0.030 mm), Width: 38 mm (Tolerance ±0.12 mm), Number of Rollers: 2×28, Roller Diameter: 12 mm, Roller Length: 22 mm, Taper Angle: 12°, Clearance Adjustment Range 0.05-0.10 mm, chamfer 1.5 mm × 45°, surface roughness Ra≤0.8 μm
Compatible Models and Applications: Compatible with Cat 320D/323D excavators and 950H/966H loaders, used for gearbox output shaft, final drive planetary carrier, and rear axle differential. Matching parts include locknuts, thrust washers, and bearing housings. Rated radial load ≥120 kN, rated axial load ≥85 kN, fatigue life ≥15000 hours
Performance Parameters: Lubrication method: Grease lubrication (Cat Moly Paste recommended), grease filler 30-35 g, limiting speed 4500 rpm (oil lubrication), coefficient of friction ≤0.002, corrosion resistance meets ISO 9227 neutral salt spray test ≥48 hours without rust, radial runout after assembly ≤0.05 mm
Structural and Performance Advantages

Combined Load Bearing: The double-row tapered roller structure can simultaneously withstand large radial loads and bidirectional axial loads, adapting to complex stress conditions in transmission systems, effectively dispersing stress, and reducing the risk of localized wear (Cat).

Precise Positioning: Made of 52100 bearing steel, hardened for high dimensional accuracy, the tapered angle design ensures a tight fit between the rollers and raceways, minimizing radial runout during operation, thus improving transmission accuracy and equipment stability.

Long-lasting Durability: The phenolic resin cage is lightweight and high-temperature resistant, while the rollers are made of 20CrMnTi material, offering excellent impact resistance and wear resistance, suitable for harsh working conditions in engineering machinery, and extending service life.

Easy Maintenance: High component integration allows for integral press-fitting during installation, with gaps adjustable via lock nuts, eliminating the need for complex tooling and reducing maintenance difficulty and time costs.

Installation and Maintenance Points:
**Before installation, clean the bearing assembly, journal, and bearing housing, checking for burrs and cracks.** Use cold pressing (pressure ≤25 kN, applied to the inner ring end face), and do not strike the outer ring. After installation, adjust the clearance to 0.05-0.10 mm, ensuring smooth rotation and end face runout ≤0.05 mm.

Perform a 1-hour trial run; the bearing temperature should be ≤80℃, with no abnormal noise or vibration. Check the lubrication status and clearance every 1500 hours, and replenish grease every 3000 hours. Replace the assembly when roller wear exceeds 0.2 mm or pitting appears on the raceway.

When replacing, prioritize original parts, ensuring the taper angle, roller dimensions, and clearance meet standards. After installation, check the locknut and thrust washer for tightness to prevent loosening and bearing failure.