CAT 6V-5264 BEARING

The CAT 6V-5264 is a Caterpillar genuine needle roller bearing without an inner ring, suitable for use in compact spaces such as hydraulic pumps and gearboxes, and designed to withstand radial loads. The following is structured raw data and does not include information on replacement parts (Cat® Parts).

Core Technical Parameters (Raw Data)

Item Details
Basic Attributes
Model: 6V-5264, Type: Single-row needle roller bearing without inner ring (with cage), Material: GCr15 high-carbon chromium bearing steel, quenched and tempered (HRC 61-65), Weight: 0.32 kg, Operating Temperature: -40℃ to +120℃, Lubrication: Grease/Oil, Suitable for compact spaces, low to medium speed, and medium to heavy load applications, used to replace sliding bearings and reduce friction.

Key Dimensions
Inner Diameter: 40 mm (1.575 in), Outer Diameter: 52 mm (2.047 in), Width: 25 mm (0.984 in), Needle Roller Diameter: 3 mm, Number of Needles: 32, Cage Material: PA66+GF30, Chamfered Ends: 1×45°, Radial Clearance: 0.012-0.025 mm, No Inner Ring Design, Directly Fits Shaft Diameter (Shaft Diameter Tolerance) (h6) Compatible Models and Parts: Compatible with the hydraulic pump drive shaft, gearbox input shaft, and pilot pump of Cat 305.5 and 306 excavators, and 420F2 and 430F2 loaders. One piece per part. Bears pure radial load. Suitable for speeds ≤4000 r/min.

Performance Parameters: Radial rated dynamic load ≥48 kN, radial rated static load ≥62 kN, maximum permissible linear velocity ≤6 m/s, coefficient of friction ≤0.002 (grease lubrication), fatigue life ≥10000 hours, rated axial load ≤5 kN (prohibited from bearing major axial loads).

Structural and Performance Advantages: Compact design without inner ring: saves axial and radial space, reducing installation space by 20% compared to needle roller bearings with inner rings. Suitable for narrow installation parts such as hydraulic pumps. Directly mates with the shaft diameter, reducing the number of parts and lowering costs.

High-carbon chromium bearing steel material: GCr15 steel, quenched and tempered, exhibiting excellent hardness and wear resistance. The needle roller surface roughness Ra≤0.05 μm reduces friction and wear, extending service life.

Nylon cage: PA66+GF30 cage, high strength, lightweight, chemical corrosion resistant, provides precise needle roller positioning, avoids needle roller contact friction, reduces operating noise, and improves rotational accuracy.

Original factory quality assurance: Manufactured by Caterpillar, with dimensional tolerances strictly controlled within ±0.01 mm. Precise fit with shaft diameter and bearing housing ensures strong adaptability and avoids jamming and wear failures caused by dimensional deviations.

Installation and Maintenance Points (Original Data)

Installation Procedure: Clean the bearing, shaft diameter, and bearing housing surfaces. Shaft diameter surface hardness ≥ HRC 58, surface roughness Ra ≤ 0.8 μm, bearing housing bore tolerance H7, interference fit 0.010-0.020 mm. Press the bearing into the bearing housing using the cold pressing method. After installation, check the radial clearance and end face runout (≤ 0.02 mm) to ensure no jamming.

Maintenance Cycle: Check grease level every 500 hours, replenish grease every 2000 hours, and check bearing wear every 8000 hours. Replace the bearing when radial clearance exceeds 0.05 mm. If needle roller breakage or cage damage is found, stop the machine immediately and replace the affected bearing.

Common Faults and Solutions: Shaft diameter wear can cause bearing loosening, requiring shaft diameter repair or shaft replacement; poor lubrication can cause bearing overheating, requiring inspection of the lubrication system and replenishment of appropriate grease; bearing housing bore deformation can cause uneven force on the needle rollers, requiring replacement of the bearing housing.