CAT 191-0679 BEARING

CAT 191-0679 is a Caterpillar genuine single-row deep groove ball bearing (suitable for high-speed, light-to-medium load applications such as hydraulic pump spindles and gearbox input shafts, used for radial and bidirectional slight axial load bearing to ensure smooth transmission). The following is the original data and does not include replacement parts information.

Core Technical Parameters (Raw Data)

Item Details
Basic Attributes
Model 191-0679, Type: Single-row deep groove ball bearing, Material: Inner/Outer ring 52100 bearing steel (quenched + tempered), chrome steel balls, stamped steel cage, Single weight 0.48 kg, Operating temperature -40℃ to +120℃, Suitable for lithium-based grease (NLGI 2), Grease lubrication, Limiting speed 5800 rpm (grease lubrication), Double-sided stamped steel dust cover, Rated radial load 62 kN, Rated static load 48 kN, Fatigue life ≥10500 hours, Coefficient of friction μ≤0.002
Key Dimensions
Inner diameter 65 mm (2.559 in), Outer diameter 120 mm (4.724 in), Width 23 mm (0.906 in), Chamfer r1.5 mm, Inner diameter tolerance +0.018/-0 mm, Outer diameter tolerance 0/-0.012 mm, width tolerance ±0.08 mm, surface roughness Ra 0.1 μm, inner and outer ring hardness HRC 60-64, steel ball hardness HRC 62-66, radial clearance C3 group (0.025-0.040 mm)

Compatible Models and Parts: Compatible with Cat 323D excavator hydraulic pump spindle and 966M loader gearbox input shaft, one piece per part. Suitable for high-speed rotation, primarily radial with slight bidirectional axial loads, ensuring transmission efficiency and stability.

Performance Parameters: Impact load capacity ≥180 kN, wear resistance ≥7000 hours (normal lubrication), suitable for mineral oil/synthetic hydraulic oil environments, shaft fit accuracy H7/h6, cage material stamped steel plate, grease filling amount 18 cm³ Structural and Performance Advantages
Single-row deep groove ball bearing structure: Can simultaneously withstand radial loads and bidirectional slight axial loads, suitable for high-speed rotation conditions. Simple structure, easy installation, and low maintenance costs.

Double-sided dust cover design: Effectively prevents dust and impurities from entering the bearing, extending grease life, reducing wear, and suitable for dusty engineering machinery operating environments.

Stamped steel plate cage: Precisely guides the movement of steel balls, reduces friction and noise, prevents steel balls from contacting each other, and improves the stability and reliability of the bearing during high-speed operation.

Installation and Maintenance Points (Original Data)
Installation: Clean the bearing and journal/mounting seat. Cold press installation (pressure ≤ 60 kN), ensuring flush end faces. After installation, radial runout ≤ 0.010 mm, journal surface hardness ≥ HRC 58, roughness Ra ≤ 0.1 μm. Welding or heat fitting is prohibited.

Maintenance: Replenish grease every 500 hours, filling the bearing to 1/3-1/2 of its volume; check for wear every 2000 hours. If journal wear is ≤0.08 mm, normal use is possible; otherwise, replace the journal and bearing.

Troubleshooting: For abnormal rotation, check lubrication and cleanliness; for unusual noise, check radial clearance and fit accuracy; for excessive temperature, repair seals and lubrication, and replace relevant components promptly.