CAT 325-6009 Straight Sleeve Bearing

CAT 325-6009 (3256009) YM is a Caterpillar original general-purpose radial ball bearing used for shaft end rotational support in chassis, gearboxes, or hydraulic systems. It is suitable for low-to-medium speed, medium-load conditions. The following is precise original part information:

Core Parameters and Compatibility Information

Item Details
Part Model: CAT 325-6009 YM Original Radial Ball Bearing, weighing approximately 0.28 kg (0.617 lb), suitable for low-to-medium speed, medium-load shaft end rotational support scenarios, primarily bearing radial loads, suitable for shaft end structures with a pin diameter of approximately 40 mm.

Core Material: Bearing steel (52100), inner and outer rings are hardened to a hardness of HRC 60-64, cage is made of stamped steel plate, dust cover is made of thin steel plate, rust-proof and corrosion-resistant, suitable for outdoor dusty and humid conditions.

Key Dimensions: Inner diameter approximately 40.00 mm 1.575 in outer diameter, approximately 68.00 mm (2.677 in) outer diameter, approximately 15.00 mm (0.591 in) total width, G6 inner diameter tolerance, interference fit with shaft, interference amount 0.01-0.02 mm, suitable for mounting structures with a standard shaft diameter of 40 mm.

Structural Features: Single-row deep groove ball bearing structure with double-sided stamped steel dust cover to prevent dust and moisture from entering the bearing, ensuring long-term lubrication performance. Suitable for low to medium speed conditions, can withstand radial loads and small bidirectional axial loads, smooth operation, and low noise.

Compatible Models: Suitable for chassis suspension, gearbox output shaft, hydraulic pump drive shaft, etc. of CAT 950M/966M loaders, D6R/D6T bulldozers, 140M graders, etc., for rotational support and load transmission.

Accessories: Compatible with CAT 5P-3510 bearing puller, 4C-9520… Install the punch cylinder using the CAT 356-5975/6D-4189 retainer. Installation requires a tight fit with the shaft end for precise positioning.

Core Functions and Installation Points:

Load Bearing: Primarily designed to withstand radial loads, it can also withstand small bidirectional axial loads, suitable for low-to-medium speed, medium-load rotational conditions. It reduces friction between the shaft and the bore, ensuring shaft rotational accuracy and extending component lifespan.

Installation Specifications: Clean the mounting holes, bearings, and shaft surfaces. Inspect the bearings for deformation, cracks, rust, or other damage. Ensure the dust cover is intact and undamaged.

Install the bearings using cold pressing or hot fitting (oil temperature ≤80℃), ensuring coaxiality with the shaft. After pressing, check that the bearing rotates freely without jamming or abnormal noise.

Tighten the relevant fasteners to the torque specified in the machine manual (typically 12-18 N·m). After installation, ensure no axial movement or clearance, guaranteeing stable operation.

Maintenance Recommendations: Check bearing wear, looseness, and seal condition every 600-800 working hours. Replace with genuine parts immediately if abnormal noise, jamming, or seal failure is observed.

Use only genuine CAT 325-6009 YM bearings to avoid increased friction, premature bearing damage, or component failure caused by non-genuine parts with incompatible dimensions/materials.