CAT 186-2915 65mm Spherical Roller Bearing

CAT 186-2915 (1862915) is a Caterpillar genuine radial needle roller bearing, suitable for high-speed, medium-load rotating components such as gearboxes and drive axles. It is used for radial support of planetary gears, idler gears, or connecting shafts. The following is precise genuine part information:

Core Parameters and Compatibility Information

Item Details
Part Model: CAT 186-2915 Genuine radial needle roller bearing, weighing approximately 0.12 kg (0.26 lb), suitable for medium-high speed, medium-load radial support applications, used for planetary gears, idler gear shafts, etc., bearing large radial loads, suitable for closed lubrication conditions such as gearboxes and drive axles (Cat®…)

Core Material: Bearing steel (AISI 52100) cage + high-precision needle rollers. The needle rollers are quenched and tempered (hardness 60-64 HRC). The cage is made of stamped steel plate/engineering nylon, wear-resistant and fatigue-resistant, suitable for temperatures from -40℃ to… Suitable for 120℃ operating conditions and oil-lubricated environments.

Key Dimensions: Inner diameter approx. 38.00 mm (1.496 in), outer diameter approx. 52.00 mm (2.047 in), total width approx. 22.00 mm (0.866 in). No inner ring design; journal and bearing housing form raceways. Compact structure with small radial cross-section.

Structural Features: No inner ring needle roller + cage assembly; uniform needle roller distribution; stable centrifugal force at high speeds; suitable for journal and bearing housing precision IT6-IT7; surface roughness Ra≤0.4μm; requires oil lubrication to ensure friction reduction at high speeds.

Compatible Models: Compatible with CAT 950G/950H loaders, 140M/160M graders, and 320D/323D excavators for planetary carriers, intermediate idler shafts, or drive axle differentials. Used for radial support in medium-high speed, medium-load Cat models.

Accessories: Compatible with CAT 5P-3510. Bearing puller, 4C-9520 mounting punch, mounting hole tolerance H7, journal tolerance g6, assembly clearance 0.01-0.03 mm, requires CAT special gear oil for lubrication.

Core Functions and Installation Points

Load and Friction Reduction: Bears large radial loads with a small radial cross-section, suitable for high-speed rotation, reduces journal and bearing housing friction, ensures transmission efficiency, and is suitable for the closed oil lubrication environment of the gearbox/drive axle.

Installation Specifications
Clean the journal, mounting hole, and bearing. Inspect the bearing for deformation, missing/broken needle rollers, cage cracks, or other damage.

Cold press the bearing into the mounting hole using the special punch, ensuring the end face is flush with the mounting hole plane. The journal-bearing clearance should be 0.01-0.03 mm.

After installation, add CAT special gear oil to the oil level line. Rotating parts should move freely without jamming or abnormal noise. Tighten the relevant fasteners (torque according to the model manual, typically 15-20 N·m).

Maintenance Recommendations: Check bearing wear, cage condition, and lubrication every 800-1000 working hours. Replace with genuine parts immediately if needle roller wear, cage deformation, or poor lubrication are observed.

Use only genuine CAT 186-2915 parts to avoid mismatched dimensions/materials that could lead to uneven needle roller wear, cage breakage, transmission jamming, or component failure.