CAT 268-1935 BEARING-TAPE

CAT 268-1935 is a Caterpillar genuine tapered roller bearing for piston motor shafts (commonly known as “bearing tape,” a special bearing assembly for compatible assembly). It is used at the shaft end of hydraulic piston motors to withstand both radial and axial loads, ensuring stable shaft rotation. The following is pure original data and does not include replacement parts information.

Core Technical Parameters (Raw Data)

Item Details
Basic Attributes Model 268-1935, Type: Tapered Roller Bearing (Motor Shaft Dedicated), Material: Bearing Steel (High Carbon Chromium Steel), Single Weight: 1.8 kg, Operating Temperature: -40℃ to +120℃, Suitable for Piston Motor Shaft Diameter: 70 mm, Rated Radial Load: 28 kN, Rated Axial Load: 15 kN, Limiting Speed: 3000 rpm, Lubrication Method: Grease/Oil Lubrication Compatible

Key Dimensions (Metric/Imperial): Inner Diameter: 70 mm (2.76 in), Outer Diameter: 110 mm (4.33 in), Width: 25 mm (0.98 in), Number of Rollers: 18, Roller Taper Angle: 12°, Inner and Outer Ring Fit Tolerance: P6, Radial Clearance: C3 Group

Performance Parameters Inner and Outer Ring Hardness: HRC 60-64, Roller Hardness: HRC 62-66, Surface Roughness: Ra≤0.04 μm diameter, phenolic resin cage material, contact rubber seal, suitable for systems with operating pressure ≤25 MPa.
Structure and Fitting Characteristics:
**Bidirectional Load Bearing:** The tapered roller structure can simultaneously withstand radial and unidirectional axial loads, suitable for high-speed rotation of hydraulic piston motors, effectively distributing shaft loads, avoiding localized stress concentration, and improving motor operational stability.

Precision Assembly Fit: Factory pre-adjusted clearance and tolerances, directly compatible with the shaft ends of hydraulic piston motors in equipment such as skid steer loaders and paving compactors, requiring no additional adjustments, ensuring assembly accuracy and operational reliability.

Optimized Sealing and Lubrication: The contact rubber seal + phenolic resin cage design prevents hydraulic oil leakage and contaminant intrusion, suitable for grease or oil lubrication, extending bearing life.

Compatible Models and Application Scenarios

Skidney Steer Loaders: 262, 252B3, 236B3, 262B, 252B, 248B, 246B, 268B, 236B, 236, 248, 246, 252, etc.

Road Compactors: CW16, CW-16, etc.

Application Scenarios: Hydraulic piston motor shaft end support, compatible with travel and swing hydraulic motors, ensuring efficient power transmission during equipment travel and operation.

Installation and Maintenance Points (Original Data)

Installation: Clean the shaft diameter and bearing housing bore, ensuring no scratches or rust on the surface. Shaft diameter fit tolerance k6, bearing housing bore fit tolerance H7.

Use the hot fitting method (oil temperature 80-100℃) to avoid impact that could deform the bearing. After installation, check the end face runout to be ≤0.05 mm.

After installation, add lithium-based grease (NLGI 2) as specified, ensuring adequate lubrication. Run the bearing under no-load for 5-10 minutes; check for any jamming or abnormal noise.

Maintenance: Check the bearing’s operating condition every 1500 hours. Replace it immediately if the temperature rise exceeds 40°C or abnormal noise occurs.

Check the grease condition every 500 hours. Clean the grease filler nozzle before adding grease to prevent contaminants from entering the bearing.