CAT 2P-3187 BEARING

CAT 2P-3187 is a stamped outer ring needle roller bearing (casing type) for Caterpillar engineering machinery, suitable for high-speed, light-load rotating and positioning parts. The following is raw data only, without replacement parts information.

Core Technical Parameters (Raw Data)

Item Details
Basic Attributes
Model: 2P-3187; Type: Stamped Outer Ring Needle Roller Bearing (Shell Type); Material: Bearing Steel (52100); Weight: 0.045 kg (0.10 lbs); Operating Temperature: -40℃ to +120℃; Outer Ring Surface: Zinc-plated and passivated; Needle Roller Surface: Carburized and quenched; Hardness: HRC 60-64; Lubrication Method: Grease lubrication preferred; Rated Life: ≥15000 hours (standard operating conditions)

Key Dimensions (Metric/Imperial):
Inner Diameter: 25.40 mm (1.000 in); Outer Diameter: 34.93 mm (1.375 in); Width: 19.05 mm (0.750 in); Needle Roller Diameter: 2.38 mm; Number of Needles: 18; Needle Roller Length: 17.46 mm; Outer Ring Wall Thickness: 1.50 mm; Chamfer at Both Ends: 0.5×45°; Raceway Surface Roughness: Ra≤0.4 μm, roundness≤0.01 mm
Matching and Performance Parameters: Suitable for shaft diameter 25.40 mm (h6 tolerance), outer ring to mounting hole clearance 0.005-0.015 mm, rated radial load ≥18 kN, rated axial load ≥2.5 kN, maximum permissible speed 6500 rpm (grease lubrication), limiting speed 8000 rpm (oil lubrication)

Structure and Adaptability Characteristics:
Stamped Outer Ring Design: Thin steel sheet stamped outer ring, lightweight, compact installation space, suitable for high-speed, light-load components with limited space, such as small gear shafts and camshafts.

Full complement needle roller structure: Cageless full complement needle roller structure, large contact area, strong radial load capacity, suitable for high-frequency, low-amplitude impact conditions, reducing vibration and noise.

Sealing Adaptation: Pre-drilled sealing grooves at both ends of the outer ring, suitable for nitrile rubber (NBR) dust rings, IP54 protection rating, suitable for dusty and humid outdoor operating environments.

Compatible Models and Application Scenarios

Mini Excavators: Hydraulic pump drive shafts and pilot valve shafts (e.g., 301.7CR, 302.7CR), suitable for high-speed, light-load, and positioning requirements.

Loaders: Gearbox shift fork shafts and steering cylinder piston rods (e.g., 906M, 907M), suitable for high-frequency reciprocating and rotating conditions.

Road Rollers: Vibratory wheel eccentric shafts and small gearbox output shafts (e.g., CB-24B, CB-34B), suitable for continuous rotation and radial positioning requirements.

Installation and Maintenance Points (Original Data)

Installation: Clean bearings, journals, and mounting holes, ensuring they are free of oil and metal shavings. Inspect journals for scratches and deformation, and ensure dimensions meet h6 tolerance requirements.

Cold press-fit: Use a dedicated press to evenly press the outer ring end face. Do not strike the needle roller end face. After installation, control the axial clearance to 0.01-0.03 mm.

Fill with NLGI Grade 2 lithium-based grease, filling to half the bearing cavity. Replenish lubrication after installation.

Maintenance: Check radial clearance every 2000 hours. Replace immediately if clearance > 0.10 mm.

Replenish grease every 2500 hours. In harsh conditions (dusty, humid), shorten this to 1000 hours/cycle to prevent dry friction on the raceways.