CAT 268-1941 Tapered Roller Bearing

CAT 268-1941 is a Caterpillar single-row tapered roller bearing (outer ring assembly) for piston-type hydraulic motors, suitable for hydraulic drive systems of skid steer loaders and paving equipment. The following is raw data only, without replacement parts information.

Core Technical Parameters (Raw Data)

Item Details
Basic Attributes Model 268-1941, Type Single Row Tapered Roller Bearing (Outer Ring + Roller Assembly), Material Bearing Steel (52100), Single Weight 1.85 kg (4.08 lbs), Operating Temperature -40℃ to +120℃, Surface Treatment Carburizing and Quenching, Hardness HRC 60-64, Rated Life ≥12000 hours (Standard Conditions)

Key Dimensions (Metric/Imperial) Inner Diameter 65.00 mm (2.5591 in), Outer Diameter 100.00 mm (3.9370 in), Width 25.00 mm (0.9843 in), Taper Angle 12°, Large End Chamfer 2×45°, Small End Chamfer 1×45°, Raceway Surface Roughness Ra≤0.4 μm, Roundness ≤0.01 mm, Wall Thickness Difference ≤0.02 mm
Matching and Performance Parameters: Suitable for shaft diameters of 65.00 mm (k5 tolerance), suitable for bore diameters of 100.00 mm (H7 tolerance), interference fit 0.015-0.028 mm, radial clearance 0.025-0.045 mm, rated radial load ≥95 kN, rated axial load ≥35 kN, maximum permissible speed 2600 rpm (grease lubrication)

Structure and Adaptability Characteristics:
Integrated Outer Ring Design: The outer ring and roller assembly are integrated, simplifying assembly and adapting to radial and unidirectional axial load conditions of hydraulic motor output shafts, with strong impact resistance.

High-Precision Raceway: The raceway is ultra-precision machined, with a generatrix straightness ≤0.005 mm, ensuring uniform load distribution, reducing off-center wear, and adapting to high-frequency start/stop and impact conditions.

Sealing Adaptation: A pre-reserved sealing groove on the outer side of the outer ring accommodates nitrile rubber (NBR) skeleton oil seals, providing dust and water protection, suitable for dusty and humid outdoor operating environments.

Compatible Models and Application Scenarios

Skidney Steer Loaders: Used for the output of hydraulic piston motors in models such as 267, 267B, 277, 277B, 287, and 287B, providing radial and axial positioning for the drive system.

Road Paving Equipment: Used for the hydraulic drive components of pavers and graders such as AP-1000D, AP-500D, and BG-260D, suitable for heavy-duty and continuous operation.

Installation and Maintenance Points (Original Data)

Installation: Clean the outer ring, journal, and mounting holes, ensuring they are free of oil and metal shavings. Inspect the journal for scratches and deformation, and ensure dimensions conform to k5 tolerance.

Heat installation (oil temperature 80-100℃). After cooling, ensure a tight fit with the journal. Do not strike when cold. After assembly, control the axial clearance to 0.025-0.045 mm.

Fill with NLGI Grade 2 lithium-based grease, filling 1/3 of the bearing cavity. Replenish lubrication after installation. Maintenance: Check radial clearance every 1200 hours; replace immediately if clearance > 0.15 mm.

Replenish grease every 1800 hours; for severe operating conditions, shorten this to 800 hours/cycle to prevent dry friction on the raceways.