CAT 254-0283 Bearing-Spherical Roller

CAT 254-0283 is a Caterpillar genuine double-row self-aligning roller bearing (spherical bearing), suitable for the transmission/traverse mechanisms of excavators, loaders, and other equipment. It is used to withstand heavy radial loads and bidirectional axial loads, and is suitable for low to medium speeds and shaft misalignment conditions. The following are the key information.

Core Technical Parameters

Item Details
Part Model: CAT 254-0283 (Double row self-aligning roller bearing, symmetrical rollers, stamped steel cage, no seal, cylindrical bore, standard clearance)

Material: GCr15 bearing steel (HRC 60-64), outer ring spherical raceway, inner ring double raceway, surface ground, suitable for -30℃ to +120℃ operating conditions

Key Dimensions: Inner diameter 50.8 mm (2.00 in), outer diameter 112.712 mm (4.4375 in), width 38.1 mm (1.50 in), chamfer 2 mm

Single Weight: Approx. 1.42 kg (3.1306 lbs)

Load and Speed: Rated radial dynamic load 102 kN, rated radial static load 108 kN, rated axial dynamic load 35 kN, grease-lubricated limiting speed 3200 rpm, radial clearance CN (0.02-0.04 mm)

Core Functions: Bears heavy radial and bidirectional axial loads, with a 1.5° self-aligning capability, compensates for shaft/bearing housing misalignment, suitable for low-to-medium speed transmission components, ensuring smooth operation.

Structure and Core Functions:

Double-row self-aligning structure: Double-row symmetrical rollers + outer ring spherical raceway, automatically compensates for shaft/bearing housing misalignment within 1.5°, suitable for installation errors or shaft deflection conditions.

Stamped steel cage: Lightweight, high-strength, evenly spaced rollers, reduces frictional heat generation, suitable for low-to-medium speed conditions.

Seamless design: Suitable for oil-lubricated or grease-lubricated closed cavities, requires the use of an equipment sealing system to prevent impurities from entering.

Standard clearance setting: CN-level radial clearance, suitable for conventional operating conditions, no additional adjustment required after installation, balancing operational accuracy and thermal expansion requirements.

Compatible Models and Application Scenarios

Compatible Equipment: CAT 320GC/323GC excavators, 966M loaders, and slewing bearings, travel reducers, drive axles, etc., on some graders.

Core Purpose: Used to support rotating components such as drive shafts and gear shafts, providing stable support under low to medium speed (≤2800 rpm) and heavy load conditions in earthmoving, mining, and other applications. It compensates for installation deviations and extends the life of transmission components.

Installation and Maintenance Points

Installation: Clean the journal and bearing housing bore. Ensure the inner ring is interference-fitted with the shaft (interference 0.015-0.025 mm), and the outer ring is clearance-fitted with the bearing housing (clearance 0.01-0.02 mm).

Use a dedicated press-fit tool for installation. Do not strike the rollers/raceways. Ensure the bearing end face is tightly against the shaft shoulder to avoid misalignment.

Maintenance: For grease lubrication, replenish lithium-based grease every 250 hours. For oil lubrication, ensure sufficient oil level and clean oil.

Regularly check the bearing temperature (normal ≤ 85℃) and noise. If abnormal noise or temperature rise occurs, repair or replace the bearing promptly.

For long-term storage, apply anti-rust oil and seal the bearing to prevent corrosion from affecting installation and performance.