CAT 464-9728 Cylindrical Roller Bearing

CAT 464-9728 is a Caterpillar genuine single-row deep groove ball bearing, suitable for the sun gear shaft end of the Cat 306E2/307E2 excavator swing gearbox and the second shaft support position of the 906M loader gearbox. It is used to withstand radial loads and is suitable for low-to-medium speed rotation conditions. The following is pure raw data and does not include replacement parts information.

Core Technical Parameters (Raw Data)

Item Details
Basic Attributes
Model: 464-9728; Type: Single-row deep groove ball bearing (with cage, double-sided metal dust cover); Material: Rolling elements are chromium steel (GCr15, hardened hardness HRC 60-64); Inner/Outer rings are bearing steel (GCr15SiMn, hardened hardness HRC 61-65); Cage: Stamped steel plate (SPCC, galvanized surface); Weight: 0.21 kg; Operating temperature: -40℃ to +120℃; Rated service life: ≥18000 hours; Lubrication method: Grease lubrication (recommended Cat DEO-ULS No. 2 lithium-based grease); Sealing type: Double-sided metal dust cover (non-contact, clearance 0.15 mm); Protection rating: IP54; Applicable journal diameter: φ30 mm; Applicable bore diameter: φ55 mm

Key Dimensions
Inner diameter: 30 mm (tolerance 0/-0.010 mm); Outer diameter: 55 mm mm (tolerance 0/-0.015 mm), width 13 mm (tolerance ±0.08 mm), number of steel balls 10, steel ball diameter 8 mm, cage pitch circle diameter 40 mm, inner ring wall thickness 7 mm, outer ring wall thickness 6 mm, inner ring raceway radius 4.1 mm, outer ring raceway radius 4.1 mm, radial clearance 0.012-0.025 mm
Performance parameters: Radial rated dynamic load 12.8 kN, radial rated static load 7.5 kN, limiting speed grease lubrication 6000 rpm (no lubrication ≤1000 rpm), coefficient of friction ≤0.002, elastic modulus 208 GPa, Poisson’s ratio 0.3, coefficient of thermal expansion 11.8×10^-6/℃, salt spray resistance ≥96 hours, impact toughness ≥20 J/cm² Structural and Performance Advantages
Single-row deep groove ball bearing structure: Can simultaneously withstand radial loads, suitable for low-to-medium speed, radially driven shaft end support scenarios; compact structure, easy installation.

Double-sided dust cover design: Metal dust covers effectively prevent dust and debris from entering the bearing interior, protecting the rolling elements and raceways, and extending service life.

Stamped steel cage: Ensures uniform distribution of steel balls, reduces friction between rolling elements, improves rotational stability, and is suitable for medium-speed operating conditions.

High-precision dimensional fit: Precision machining of the inner ring, outer ring, and rolling elements ensures smooth bearing operation and reduces noise and vibration.

Installation and Maintenance Points (Original Data)

Installation: Clean the journal and bearing housing bore (no burrs/oil stains), inner ring interference fit (cold fitting recommended, pressing force ≤8 kN), outer ring clearance fit. After installation, check radial runout with a dial indicator (≤0.02 mm). Tighten the nuts to a torque of 40-50 N·m. Do not strike the bearing end face to avoid deformation of the dust cover and displacement of the steel balls. Maintenance: Check bearing temperature every 600 hours (≤75℃ is normal), replenish grease every 1500 hours (1/3 of the bearing cavity volume), replace bearing every 18000 hours, avoid overload operation (≤110% of rated load), and prevent high-speed idling (≥120% of the limiting speed).

Troubleshooting: Overheating is often caused by insufficient lubrication or too small clearance; replenish grease and adjust the clearance. Abnormal noise is often caused by worn steel balls, loose dust covers, or foreign objects entering the bearing; replace the bearing. Excessive radial runout is often caused by worn raceways; replace the bearing.