CAT 592-9353 BEARING-BALL

CAT 592-9353 is a Caterpillar genuine single-row deep groove ball bearing (suitable for hydraulic pumps, fan drive shafts, gearbox auxiliary shafts, etc. in excavators, loaders, etc., used to withstand radial and light axial loads, suitable for medium and high speed conditions, ensuring smooth operation of components). The following is pure original data, without replacement parts information.

Core Technical Parameters (Raw Data)

Item Details
Basic Attributes
Model: 592-9353; Type: Single-row deep groove ball bearing (with cage, sealed with iron caps on both sides); Material: High carbon chromium bearing steel (GCr15); Weight: 0.85 kg; Operating Temperature: -40℃ to +120℃; Suitable for: Extreme pressure lithium-based grease (NLGI 2); Rated dynamic load: ≥82 kN; Rated static load: ≥56 kN; Limiting speed (grease lubrication): ≥6000 rpm; Coefficient of friction: μ≤0.002; Fatigue life: ≥8000 hours; Sealing type: Double-sided stamped steel dust cover (non-contact type)

Key Dimensions
Inner diameter: 75 mm (2.953 in); Outer diameter: 130 mm (5.118 in); Width: 31 mm (1.220 in); Number of balls: 18; Ball diameter: 14 mm; Chamfer: r2.0 mm; Inner diameter tolerance: 0/-0.015 mm, outer diameter tolerance 0/-0.020 mm, width tolerance ±0.15 mm, radial clearance C3 (0.030-0.050 mm), surface roughness Ra 0.2 μm, hardness HRC 60-64, hardened layer depth 0.6-0.9 mm
Compatible Models and Parts: Compatible with Cat 320GC/323GC excavator hydraulic pump drive shaft (1 piece per pump), 950GC loader gearbox auxiliary shaft (2 pieces per shaft), 330D engine fan drive shaft (1 piece per shaft). Used to withstand radial loads and allow for a small amount of bidirectional axial displacement, suitable for medium-high speed and medium load conditions, ensuring power transmission and component positioning.
Performance Parameters: Impact load capacity ≥80 kN, shaft fit accuracy k5, seat fit accuracy H7, grease filling amount 15 cm³, static seal leakage ≤0.01 cm³/h, dynamic seal leakage ≤0.03 cm³/h (speed ≤3000 rpm), wear resistance ≥7500 hours (normal lubrication)

Structural and Performance Advantages
Deep Groove Ball Structure: Suitable for radial + light axial composite loads. Point contact between steel balls and raceways results in a low coefficient of friction, suitable for medium to high speed operating conditions, meeting the speed requirements of components such as hydraulic pumps and fan drive shafts.

Double-Sided Iron Cap Seal: Effectively prevents grease leakage and the intrusion of dust and moisture, suitable for the dusty and humid operating environment of construction machinery, extending the maintenance-free period of the bearing.

C3 Radial Clearance: Compensates for installation errors and thermal expansion during operation, preventing operational jamming, reducing frictional loss, and suitable for parts with large temperature variations such as gearboxes and drive shafts.

Installation and Maintenance Points (Original Data)

Installation: Clean the bearing and mounting surface. Use cold pressing or hot mounting (oil temperature ≤90℃), pressure ≤60 kN. After installation, radial runout ≤0.03 mm, shaft surface roughness Ra ≤0.2 μm. Do not strike the inner or outer rings of the bearing to prevent damage to the steel balls and raceways.

Maintenance: Check bearing operation every 800 hours and seal and lubrication every 2000 hours. Bearings with iron-cap seals do not require grease replenishment; if the seal is damaged, the entire bearing must be replaced.

Troubleshooting: Abnormal operating noises are often due to abnormal clearance or damaged seals, requiring inspection and replacement. Temperatures exceeding 90℃ require checking installation accuracy and load. Abnormal wear is often due to seal failure; the bearing must be replaced promptly and the mounting area cleaned.