CAT 471-1976 BEARING-SLEE

CAT 471-1976 is a Caterpillar genuine straight integral steel sleeve bearing (suitable for excavator booms, sticks, and loader boom pins, used for radial support and wear protection in low-speed, heavy-duty applications). The following is the original data and does not include replacement parts information.

Core Technical Parameters (Raw Data)

Item Details
Basic Attributes Model 471-1976, Type: Straight Oil-Free Integral Sleeve Bearing, Material: 42CrMo Alloy Steel (Quenched and Tempered + Nitrided), Single Weight: 1.12 kg, Operating Temperature: -40℃ to +120℃, Suitable for: Lithium-based Grease (NLGI 2), Grease Lubrication, Limiting Speed: 1050 rpm (Grease Lubrication), Surface Nitrided + Polished, No Seal, Rated Radial Load: 110 kN, Rated Static Load: 160 kN, Fatigue Life: ≥9500 hours, Coefficient of Friction: μ≤0.008

Key Dimensions Inner Diameter: 80 mm (3.150 in), Outer Diameter: 95 mm (3.740 in), Length: 65 mm (2.559 in), Wall Thickness: 7.5 mm, Chamfer at Both Ends: r2 mm, Inner Diameter Tolerance: +0.019/-0 mm, Outer Diameter Tolerance: 0/-0.013 mm, length tolerance ±0.12 mm, surface roughness Ra 0.1 μm, nitriding layer thickness 0.07-0.10 mm, hardness HRC 58-62
Compatible Models and Parts: Compatible with Cat 326D2/330D2 excavator boom pins and 962M loader boom linkage pins. One pin per component, bearing pure radial load, limiting radial runout, ensuring transmission accuracy and component stability.
Performance Parameters: Radial clearance 0.013-0.021 mm, impact load capacity ≥190 kN, wear resistance ≥5800 hours (normal lubrication), suitable for mineral oil/synthetic hydraulic oil environments, pin mating accuracy H7/h6
Structural and Performance Advantages:
42CrMo alloy steel material: quenched, tempered, and nitrided, possessing high hardness, wear resistance, and impact resistance, suitable for harsh working conditions in engineering machinery.

Integrated oil-free groove design: High structural rigidity, uniform load distribution, avoiding premature damage caused by localized stress concentration, and compatible with centralized grease lubrication systems.

Nitrided polished surface: Reduces the coefficient of friction, minimizes pin wear, improves fitting accuracy and rotational smoothness, and extends service life.

Installation and Maintenance Points (Original Data)

Installation: Clean the sleeve bearing and mounting base. Install using the press-fit method (pressure ≤95 kN), ensuring flush end faces. After installation, radial runout ≤0.011 mm. Welding or heat fitting is prohibited to prevent changes in material properties.

Maintenance: Replenish grease every 500 hours, with the grease volume being 1/3-1/2 of the sleeve bearing’s volume. Check for wear every 2000 hours. Normal use is achieved when inner diameter wear is ≤0.11 mm; replace if exceeding this limit.

Troubleshooting: For rotational jamming, check grease level and cleanliness; for abnormal noise, check fit clearance; for excessive wear, check material hardness and installation accuracy, and replace or repair relevant components promptly.