CAT 458-9966 310mm Outer Diameter Ball Bearing

CAT 458-9966 is a Caterpillar single-row deep groove ball bearing with an outer diameter of 310 mm. It is suitable for the drive axle, gearbox, or hydraulic pump spindle of heavy equipment such as Cat 980K/982M loaders and D10T/D11T bulldozers, used to support radial loads and allow high-speed rotation. The following is structured technical information.

Core Technical Parameters (Professional Version)

Item Details
Basic Attributes Model 458-9966, Single Row Deep Groove Ball Bearing (with cage, no seal), Fits Shaft Diameter 150 mm (Tolerance h6), Single Weight 14.2 kg, Quantity 1 per Unit, Used in heavy-duty rotating parts such as drive axle differential housing and gearbox output shaft end

Key Dimensions Inner Diameter φ150 mm (Tolerance H7: +0.04–0 mm), Outer Diameter φ310 mm (Tolerance k6: +0.02–+0.003 mm), Width 52 mm (Tolerance ±0.12 mm), Chamfers at both ends 2×45°, Inner Bore Surface Roughness Ra≤0.6 μm, Rolling Element Diameter 18 mm, Cage Pitch Circle Diameter 230 mm

Material and Process Material is high carbon chromium bearing steel (52100), integrally quenched (HRC) 60–64), cage made of stamped brass (H62), using vacuum degassing + martensitic quenching process, rated hardness uniformity ≤HRC 2, fatigue strength ≥1200 MPa

Performance Parameters: Rated dynamic load 290 kN, static load 220 kN, limiting speed 3200 rpm (oil lubrication)/2000 rpm (grease lubrication), operating temperature -40℃ to +150℃, radial clearance C3 (0.12–0.18 mm), compatible grease NLGI 2 grade extreme pressure lithium-based grease

Compatible Models: Loaders 980K/980M/982M, bulldozers D10T/D11T, excavators 390F, suitable for heavy-duty high-speed rotating parts such as drive axle main reducer, gearbox input shaft, and hydraulic pump spindle

Installation and Maintenance Points: Before installation, clean the inner and outer rings of the bearing, shaft diameter, and bearing housing bore. Check the bearing for rust/cracks/ If rolling elements are stuck, install them using either the hot fitting method (oil temperature 80–90℃, expansion approximately 0.15 mm) or the cold shrinkage method (liquid nitrogen – 196℃, contraction approximately 0.18 mm). The interference fit should be controlled between 0.015–0.025 mm. Direct hammering of the bearing end face is prohibited.

Clearance control: The radial clearance between the bearing and the shaft diameter should be 0.12–0.18 mm (C3 clearance). Check with a dial indicator after installation. Excessive clearance can lead to impact vibration, while insufficient clearance can cause overheating and seizing.

Lubrication requirements: For grease lubrication, fill to 2/3 of the bearing’s internal space (approximately 1.2 kg). For oil lubrication, ensure the oil level is above the center of the lowest rolling element. Check the oil quality and replenish grease every 500 hours to prevent impurities from entering the bearing.

Troubleshooting: If abnormal noise, temperature rise, or increased vibration occurs, first check the bearing clearance (if it exceeds 0.3 mm, it needs to be replaced), cage damage, or lubrication failure. If necessary, replace the bearing and correct the shaft diameter roundness to ≤0.01 mm.