CAT 469-1378 BEARING

CAT 469-1378 is a Caterpillar original single-row cylindrical roller bearing (suitable for low-speed, heavy-load components such as excavator swing mechanisms and loader gearboxes, used for radial force bearing and ensuring transmission accuracy). The following is the original data and does not include replacement parts information.

Core Technical Parameters (Raw Data)

Item Details
Basic Attributes
Model: 469-1378; Type: Single-row cylindrical roller bearing (NU type, inner ring without flange); Material: Inner ring/outer ring 52100 bearing steel (quenched + tempered), rolling elements chrome steel, cage stamped steel plate; Weight: 2.45 kg; Operating temperature: -40℃ to +120℃; Suitable for: Lithium-based grease (NLGI 2); Grease lubrication; Limiting speed: 1800 rpm (grease lubrication); Surface polished; No seal; Rated radial load: 220 kN; Rated static load: 380 kN; Fatigue life: ≥10500 hours; Coefficient of friction: μ≤0.005
Key Dimensions
Inner diameter: 95 mm (3.740 in); Outer diameter: 140 mm (5.512 in); Width: 35 mm (1.378 in); Chamfer: r2 mm; Inner diameter tolerance: +0.020/-0 mm, outer diameter tolerance 0/-0.015 mm, width tolerance ±0.12 mm, surface roughness Ra 0.1 μm, inner ring hardness HRC 60-64, outer ring hardness HRC 58-62, radial clearance C3 group (0.030-0.045 mm)

Compatible Models and Parts: Compatible with Cat 320D2/323D2 excavator swing gearbox, 966L loader gearbox second shaft, 1 piece per part, withstands pure radial load, adapts to shaft deflection and installation deviation, ensuring transmission smoothness

Performance Parameters: Impact load capacity ≥280 kN, wear resistance ≥6500 hours (normal lubrication), compatible with mineral oil/synthetic hydraulic oil environment, shaft fit accuracy H7/h6, cage material stamped steel plate (high strength, deformation resistant), grease filling amount 65 cm³

Structural and Performance Advantages
NU **Inner Ring-less Design:** Allows for axial displacement of the shaft relative to the bearing, accommodating installation errors and thermal expansion and contraction of the shaft, reducing edge stress concentration.

**52100 Bearing Steel Material:** Quenched and tempered, achieving a balance of hardness and toughness, suitable for the harsh impacts and heavy loads of engineering machinery.

**Stamped Steel Cage:** Lightweight and high-strength, it stably guides the rolling elements, reducing friction and wear, and extending bearing life.

**Installation and Maintenance Points (Original Data)**

**Installation:** Clean the bearing and mounting base. Install using the cold pressing method (pressure ≤150 kN), ensuring flush end faces. Radial runout after installation should be ≤0.015 mm. Welding or hot fitting is prohibited to prevent changes in material properties.

**Maintenance:** Add grease every 500 hours, filling to 1/3-1/2 of the bearing volume. Check for wear every 2000 hours. If inner diameter wear is ≤0.15 mm, normal use is possible; replace if exceeding this limit.

Troubleshooting: For rotational jamming, check the amount and cleanliness of grease; for abnormal noise, check the radial clearance and fit accuracy; for excessive wear, check the installation accuracy and lubrication, and replace or repair the relevant parts in a timely manner.