CAT 307-1526 Straight Sleeve Bearing

CAT 307-1526 YM is a high-strength, wear-resistant pin specifically designed for Caterpillar’s articulated systems in construction machinery. It is primarily compatible with heavy-duty articulated components such as the boom, connecting rod, and bucket of loaders and excavators. The following are original factory standard specifications and do not include replacement parts.

Core Technical Parameters

Item Details
Part Model: CAT 307-1526 YM
Product Type: Solid cylindrical pin with positioning/anti-detachment structure
Material: 4140 chromium-molybdenum alloy steel, integral forging + quenching and tempering treatment
Surface Treatment: Surface high-frequency quenching + precision grinding, local nitriding strengthening
Hardness: Surface HRC 58–62, core HB 280–320
Weight: Approx. 1.15 kg
Operating Temperature: -40℃ ~ +120℃
Key Dimensions (Metric/Imperial): Pin body diameter 40.00 mm (1.575 in), effective installation length 110.00 mm, total length to match corresponding components as needed, with standard chamfers and anti-detachment grooves/threaded holes at both ends
Matching Requirements: Compatible with 40mm inner diameter series sleeves/bushings, recommended clearance 0.03–0.06 mm
Load Capacity: Rated radial load ≥ 120 kN, excellent impact load resistance, suitable for frequent oscillation and heavy-load impact conditions.

Lubrication Design: Centered axial lubrication hole + radial oil outlet hole, supporting centralized lubrication and ensuring sufficient oil supply to the inner wall.

Structure and Core Characteristics:
High-strength forged structure: 4140 alloy steel integral forging, seamless, with outstanding tensile, fatigue, and shear resistance, capable of withstanding repeated impacts and alternating loads during engineering machinery operation, and not easily bent or broken.

Wear-resistant and corrosion-resistant surface layer: Uniform high-frequency quenching layer depth, combined with precision grinding process, low surface roughness, low friction and slow wear when mating with bushings/sleeves; better resistance to rust and scratches in dusty and muddy environments.

Integrated anti-detachment and lubrication: Equipped with standard anti-detachment grooves or threaded holes, used with snap rings and baffles to eliminate the risk of pin displacement; the central lubrication hole design allows grease to reach the friction surface directly, significantly extending the life of the hinge pair and reducing maintenance frequency.

Typical Compatible Machine Models and Application Scenarios

Loaders: Suitable for models such as 950GC, 950H, 962H, and 966, for key hinge points in the boom, swingarm, linkage, and bucket.

Excavators: Suitable for the boom, bucket, and linkage hinge pins of machines in the same tonnage class.

Core Purpose: Replaces worn pins, restores hinge clearance, resolves issues such as abnormal noise, shaking, and sluggish movement, and ensures operational accuracy.