CAT 333-2917 Bearing – Needle(Debris Resistant)

CAT 333-2917 is a Caterpillar anti-chip radial needle roller bearing cage assembly. It is primarily used for heavy-duty radial support of shafts in gearboxes, transfer cases, or hydraulic pumps, and is compatible with various small loaders, excavators, and other construction machinery. The following is precise technical and application information.

Core Parameters (Precise Version)

Project Details
Basic Attributes
Model 333-2917, Anti-chip radial needle roller bearing assembly (including cage + needle rollers), with housing bore and shaft as raceways, 1 piece/shaft end per unit, providing radial positioning, heavy-duty support, and anti-chip intrusion function.

Key Dimensions
Inner diameter 52.989 mm (2.086 in), outer diameter 73.019 mm (2.8747 in), height 24.8 mm (0.976 in), tolerance grade ISO h6/H7

Material and Process
Alloy steel, high-strength cage, tempered needle rollers, surface wear-resistant treatment, with anti-chip intrusion structural design.

Compatible Models
Ca 906/907/908 mini loaders, 301.7/302.7 mini excavators, 420/430/442 mini excavators, some gearboxes / Transfer Case Assembly Application and Installation Points: Before installation, clean the housing bores and journals, ensuring they are free of burrs and rust, with a surface roughness Ra ≤ 1.6 μm.

Use cold press installation to avoid impact that could deform the cage or displace the needle rollers.

After installation, check the radial clearance (0.015–0.03 mm) to ensure it meets the requirements of the machine’s maintenance manual and prevent needle roller jamming.

It is recommended to check lubrication and wear conditions every 2000 hours, replenishing grease or replacing components (shorter intervals for harsh operating conditions).