CAT 099-0334 25mm Inner Diameter Needle Roller Bearing

CAT 099-0334 is a Caterpillar original single-row deep groove ball bearing (suitable for rotating components such as engines and hydraulic pumps, used to withstand radial loads and allow a certain amount of axial displacement, suitable for medium-speed, light-load conditions). The following is the original data and does not include replacement parts information.

Core Technical Parameters (Raw Data)

Item Details
Basic Attributes
Model: 099-0334, Type: Single-row deep groove ball bearing (open, no seal), Material: Bearing steel (chromium steel GCr15), Weight: 0.52 kg, Operating Temperature: -40℃ to +120℃, Rated Dynamic Load: 42 kN, Rated Static Load: 22 kN, Limiting Speed: 6000 rpm (grease lubrication) / 8000 rpm (oil lubrication), Grease Filling: 12 g, Seal Type: No seal ring (open), Cage Material: Stamped steel plate, Clearance Group: C3, Rust Prevention Rating: IP54, Service Life: ≥10000 hours

Key Dimensions
Inner Diameter: 60 mm (2.362 in), Outer Diameter: 110 mm (4.331 in), Width: 22 mm (0.866 in), Chamfer: 1 mm × 45°, Inner Diameter Tolerance: 0/-0.013 mm, Outer Diameter Tolerance: 0/-0.019 mm, width tolerance ±0.15 mm, radial clearance 0.015-0.035 mm, surface roughness Ra 0.4 μm, hardness HRC 60-64, cage pitch circle diameter 85 mm, number of steel balls 12, steel ball diameter 14 mm
Compatible Models and Parts: Compatible with Cat 3126B/3126E engine water pump shaft, 320C/320D excavator hydraulic pump input shaft, and 950G loader gearbox output shaft. Used to support rotating shaft systems, absorb radial vibration, and ensure smooth operation of components.
Performance Parameters: Rated axial load 5 kN (bidirectional), coefficient of friction μ≤0.0015, rotational accuracy P6, steel ball hardness HRC 62-66, cage tensile strength ≥400 MPa, impact resistance (no cracking after 10 J impact), oil resistance (compatible with lithium-based grease), strong pitting resistance, fatigue life ≥500 hours. 10,000 Cycles
Structural and Performance Advantages
GCr15 Bearing Steel Material: High hardness and wear resistance, suitable for medium-speed rotation, effectively preventing wear between steel balls and raceways, extending bearing life.

C3 Clearance Design: Suitable for conditions with large temperature variations, preventing bearing seizure due to thermal expansion and ensuring smooth rotation.

Stamped Steel Cage: Lightweight and high-strength, capable of withstanding high speeds, reducing centrifugal force during rotation and minimizing frictional heat generation.

Installation and Maintenance Points (Original Data)

Installation: Clean the shaft and bearing housing (free of oil and impurities). Use cold-press installation. Installation pressure ≤30 kN. Shaft and bearing fit tolerance k6, bearing housing and bearing fit tolerance H7. Radial runout after installation ≤0.03 mm. Do not strike the bearing outer ring to prevent damage to the raceways and steel balls.

Maintenance: Check bearing lubrication every 1500 hours and replenish with lithium-based grease (Cat 1U-8889); replace when wear exceeds 0.2 mm; avoid prolonged overload (≤110% of rated load) to prevent bearing pitting and failure.

Troubleshooting: Abnormal noise is often caused by insufficient lubrication or worn steel balls, requiring grease replenishment or bearing replacement; abnormal temperature rise is often caused by insufficient clearance, requiring inspection and adjustment of installation tolerances.