Main Frame Guard Plate

The Main Frame Guard Plate is a dedicated protective solution for the structural frames of heavy industrial equipment. With a 3mm thickness and Q235 carbon steel construction, it delivers a yield strength of 235 MPa and tensile strength between 370-500 MPa, making it suitable for absorbing impact loads up to 5 kJ without permanent deformation. The 500mm x 400mm size is specifically tailored for mid-sized main frames, such as those found in excavators, loaders, and drilling rigs. The hot-dip galvanized coating, applied per ASTM A123, provides a zinc layer of 85 μm, offering superior corrosion resistance in outdoor and high-humidity environments. Unlike thinner 1.5mm plates that dent easily, this 3mm variant maintains structural integrity under repeated stress, reducing downtime and replacement costs.

This guard plate addresses critical pain points in construction, mining, and agriculture. In construction, frames are exposed to falling debris and collisions with tools; the 3mm steel plate disperses impact force across its surface, preventing cracks and misalignment. In mining, abrasive dust and slurry can accelerate wear—the galvanized coating resists chemical attack from acidic water and salts. For agricultural machinery, the plate protects against crop residue and soil buildup, which can cause frame corrosion. The pre-drilled 10mm holes align with standard M10 bolts, allowing field replacement in under 15 minutes with basic tools. This reduces equipment downtime and extends the service life of the main frame by up to 40% compared to unprotected frames.

Compared to other guard plates in the series, this 3mm Q235 variant is optimized for balance between weight and strength. Thicker 5mm plates add 2.5kg and are better for extreme impact zones, while 2mm plates are lighter but prone to bending under 2 kJ impacts. The 500x400mm size fits most mid-size frames, whereas larger 600x500mm plates are intended for heavy-duty mining trucks. The 10mm hole diameter is compatible with M10 bolts, avoiding the need for drilling modifications. This plate is not a one-size-fits-all solution—its dimensions and hole pattern are engineered for standard frames, ensuring a drop-in fit that maintains frame alignment and reduces vibration.

• Q235 steel with 3mm thickness provides 235 MPa yield strength, tested to withstand 5 kJ impact energy without deformation.
• Hot-dip galvanized coating (85 μm zinc layer) meets ASTM A123, offering 500-hour salt spray resistance per ASTM B117.
• Pre-drilled 10mm holes for M10 bolts enable fast installation and replacement, reducing downtime by 30%.