The SF-1 Composite Oil-Free Bushing is a high-performance sliding bearing designed for industrial equipment, featuring a three-layer composite structure of copper alloy substrate, porous bronze layer, and solid lubricant. It fundamentally solves the pain points of traditional bearings that rely on lubrication and are prone to wear. With no need for regular oiling, it operates stably under high-load, low-speed reciprocating or oscillating conditions, and is widely used in excavators, cranes, injection molding machines, conveying equipment, and more.