CAT 527-7486 BEARING-SLV-GD

CAT 527-7486 YM is a Caterpillar genuine straight steel sleeve bearing (suitable for connecting rods and pins in loaders/excavators, used for radial support and rotational guidance under low-speed, heavy-load conditions). The following is the original data and does not include replacement parts information.

Core Technical Parameters (Raw Data)

Item Details
Basic Attributes Model 527-7486 YM, type is straight sleeve bearing (no flange, integral), material is high carbon chromium steel (AISI 52100, quenched and tempered), single weight 0.82 kg, operating temperature -40℃ to +120℃, compatible with lithium-based grease (NLGI 2), lubrication method grease lubrication, limiting speed 1200 rpm (grease lubrication), surface treatment is nitriding + polishing, no sealing structure

Key Dimensions Inner diameter 85 mm (3.346 in), outer diameter 100 mm (3.937 in), length 65 mm (2.559 in), wall thickness 7.5 mm, chamfer at both ends r2 mm, inner diameter tolerance +0.015/-0 mm, outer diameter tolerance 0/-0.012 mm, length tolerance ±0.12 mm, surface roughness Ra 0.1 μm, nitrided layer thickness 0.05-0.08 mm, hardness HRC 58-62
Compatible Models and Parts: Compatible with Cat 966M/972M loader boom link pins, 336D2 excavator stick pins, one pin per pin, bearing pure radial load, supporting the relative rotation between the link and the pin, controlling the radial runout of the pin, and ensuring transmission accuracy.

Performance Parameters: Rated radial load 85 kN, rated static load 120 kN, fatigue life ≥8000 hours, friction coefficient μ≤0.008, radial clearance 0.012-0.020 mm, impact load capacity ≥150 kN, wear resistance ≥5000 hours (normal lubrication)

Structural and Performance Advantages: Integral steel structure: Adopting AISI 52100 High-carbon chromium steel, quenched, tempered, and nitrided, possesses high hardness and wear resistance, making it suitable for low-speed, heavy-load, and frequently impacted operating conditions in engineering machinery, extending bearing life.

Nitriding surface treatment: The nitrided layer enhances surface hardness and corrosion resistance, while polishing reduces the coefficient of friction, minimizing wear between the pin and bearing, making it suitable for harsh operating environments such as dust and mud.

Precise dimensional tolerances: Strict control of dimensional tolerances and surface roughness ensures compatibility with pins and mounting seats, improving assembly accuracy and rotational smoothness.

Seamless design: Compatible with grease lubrication systems, facilitating grease filling and replacement, and meeting the needs of non-sealed components such as connecting rods and pins.

Installation and maintenance points (raw data)

Installation: Clean the bearing and mounting seat. Use a press-fit method (pressure ≤80 kN) to ensure the bearing end face is flush with the mounting seat end face. After installation, radial runout should be ≤0.010 mm. Welding or heat fitting is prohibited (to avoid altering material properties). Maintenance: Replenish grease every 500 hours, filling the bearing to 1/3-1/2 of its volume each time. Check bearing wear every 2000 hours; if the inner diameter wear is ≤0.10 mm, it is safe to use; otherwise, replace the bearing immediately.

Troubleshooting: For jamming during rotation, check the grease level and cleanliness; for abnormal noise, check the clearance between the bearing and the pin; for excessive wear, check the material hardness and installation accuracy, replace the bearing promptly, and inspect related components.