CAT 5F-0255 BEARING

CAT 5F-0255 (5F0255) is a Caterpillar genuine open needle roller bearing without an inner ring and with a cage. It is suitable for rotating parts with limited radial space, low speed, and heavy loads, such as gearboxes and engines. The following is purely precise information (without additional description):

Core Parameters and Information

Item Details
Part Model: CAT 5F-0255 Needle Roller Bearing

Part Type: Open needle roller bearing without inner ring (with cage), bearing radial loads, suitable for applications with limited radial space and low speed, heavy loads

Material: High carbon chromium bearing steel (GCr15), needle roller hardness HRC 60-64, cage is made of high-quality low carbon steel sheet, stamped and galvanized for rust prevention

Key Dimensions: Inner diameter 19.05 mm (0.750 in), outer diameter 25.40 mm (1.000 in), width 12.70 mm (0.500 in), needle roller diameter 2.38 mm, quantity 14 Root, chamfered at both ends 0.5×45°

Structural Features: No inner ring, no seal, with stamped cage, standard radial clearance, suitable for grease lubrication, direct fit with shaft diameter during installation, saving radial space

Compatible Structures: Gearbox shift fork shaft bearing, engine rocker arm shaft bearing, hydraulic pump control shaft bearing, steering gear shaft bearing

Applicable Operating Conditions: Suitable for -40℃ to 120℃, suitable for shaft speed ≤1000 rpm, radial load ≤15 kN, suitable for intermittent rotation/oscillation conditions

Compatible Machines and Assemblies:

Engine: CAT C4.4, C6.6 (rocker arm shaft bearing, camshaft support bearing)

Loader: CAT 930M, 938M (gearbox shift fork shaft bearing, steering cylinder pivot bearing)

Excavator: CAT 315GC, 317GC (swing motor pilot valve bearing, stick control shaft bearing)

Grader: CAT 120M, 140M (Shovel Control Shaft Bearing, Steering Tie Rod Bearing)

Compatible Assemblies: CAT C6.6 Engine Camshaft Assembly, 930M Gearbox Shift Fork Shaft Assembly, 315GC Rotary Motor Pilot Valve Assembly

Installation and Fitting Points

Shaft Diameter: 19.05 +0.008/-0.000 mm, interference fit with the bearing inner diameter (interference 0.002-0.008 mm) to prevent relative rotation.

Mounting Hole Diameter: 25.40 +0.015/-0.000 mm, clearance fit with the bearing outer diameter (clearance 0.005-0.015 mm) for easy installation and heat dissipation.

Use a special press to smoothly press into the mounting hole. Do not hammer, as this may deform the needle rollers or damage the cage.

Before installation, clean the shaft, mounting hole, and bearing, ensuring they are free of burrs, oil, and rust. Check that the bearing needle rollers are intact and the cage is undamaged.

After installation, add general-purpose lithium-based grease (filling the bearing with 1/2 to 2/3 of its internal space), and replenish lubrication every 800 working hours.