386-4195 Side Guide Roller for PM620

Product Description：

The side guide wheels of the milling machine's travel system are cast from a high-chromium alloy and vacuum-hardened to create a composite structure with a hardened layer and a tough core. Wear-resistant alloy blocks are embedded in the wheel rim to enhance resistance to uneven wear. The double-sealed bearing unit and labyrinth-style dustproof structure effectively block the intrusion of milling material dust, and the internal grease chamber design ensures long-term maintenance-free operation. The V-shaped guide grooves and the meshing surface of the track chain are CNC-machined to ensure precise tracking even under lateral loads. A special surface texture treatment enhances friction in wet and slippery conditions. The entire galvanized surface provides excellent corrosion resistance, making it suitable for a variety of applications, including urban road milling and asphalt recycling.

How do the wear-resistant alloy blocks of the side guide wheels cope with the varying wear characteristics of road surfaces of varying hardness?

Through a gradient metallurgical process, the alloy blocks' surface layer is formed into a dispersed phase of high-hardness tungsten carbide particles. A middle transition zone maintains a tough, cushioning effect, while the bottom layer metallurgically bonds to the wheel body. This composite structure provides surface wear resistance when milling concrete, while the elastic deformation of the middle layer absorbs impact when milling asphalt surfaces. The alloy blocks utilize a modular dovetail mounting system, allowing individual wear units to be replaced. Blocks of varying hardness can be mixed to suit specific operating conditions, significantly extending overall service life.

How does the dual-sealed bearing design balance dust protection and ease of maintenance?

A multi-lip rubber seal and magnetic ring are combined on the outside to actively capture metal debris. A centrifugal oil-spinning labyrinth structure is installed inside to block dust intrusion through the airflow generated by the bearing's rotation. The grease inlet is designed as a one-way pressure valve, and a visual oil window allows for disassembly-free maintenance. The special split bearing seat structure allows for quick opening and closing, allowing seal assembly replacement without removing the track frame, significantly reducing field maintenance time.

Product Parameters