CAT 425-3583 BEARING-SLV-GD

CAT 425-3583 YM is a Caterpillar general-purpose straight sleeve bearing (connecting rod/pin sleeve for construction machinery), which is suitable for the boom, stick, and bucket pin joints of excavators/loaders. It provides support and wear resistance, and reduces frictional loss between the pin and the frame hole. The “YM” designation indicates a high-quality general-purpose replacement part that balances cost-effectiveness and adaptability, and is suitable for medium and low load conditions. The following are the core information and key points:

Core Technical Parameters

Item Details
Part Model CAT 425-3583 (4253583) YM Straight Sleeve Bearing, suitable for engineering machinery pin joints, used for rotational support and wear protection, can be stably adapted to original/YM high-quality replacement parts

Material Steel-backed Aluminum-based Alloy (Steel Back + Aluminum-Tin Alloy Layer), Steel Back Hardness HB200-240, Alloy Layer Thickness 0.3-0.5mm, Surface Brinell Hardness HB30-40, Contains solid lubricant, strong self-lubricating properties, suitable for oil-free/low-oil conditions

Key Dimensions Inner Diameter 45mm, Outer Diameter 50mm, Length 50mm, Tolerances Inner Diameter ±0.02mm, Outer Diameter ±0.03mm, Length ±0.1mm, Adapted Pin Diameter 45.01-45.03mm, Installation Clearance 0.01-0.03mm

Compatible Models CAT This product is suitable for 320D/323D excavators, 950H/966H loaders, etc., and is used for connecting pins between the boom and stick, stick and bucket, and connecting rod and rocker arm. The compatible pin model is 425-3581, and the matching seal model is 425-3580.

Performance Parameters: Working pressure 0-35MPa, working temperature -30℃ to 120℃, friction coefficient ≤0.08, wear life ≥5000 working hours, compatible with mineral oil, hydraulic oil, and other media, suitable for low-speed heavy-load rotation conditions.

Core Functions and Structural Features:
Rotation support and wear protection: Steel-backed aluminum-based alloy structure, suitable for relative rotation between the pin and the frame hole, reducing friction and wear, avoiding metal-to-metal contact leading to seizing and scoring, and extending the service life of the pin and frame hole.

Self-lubricating and friction-reducing: The alloy layer contains solid lubricant, allowing for short-term operation even without oil. This is ideal for applications where lubrication of pins in construction machinery is inconvenient, reducing maintenance frequency and downtime costs.

Highly adaptable: The standard straight-sleeve design is compatible with various Caterpillar construction machinery pin joints. No adjustment is required after installation; it precisely matches the pin and seal, ensuring flexible rotation and reliable sealing.

Easy installation: The cylindrical structure allows for quick installation using press-fit tools. After installation, it fits tightly against the pin and frame hole without loosening, improving maintenance efficiency.