售后市场 292*265*19mm 浮动油封总成

This floating oil seal assembly features a metal face seal design consisting of two precision-ground cast iron sealing rings and two elastomeric toric elements. The seal operates as a dynamic mechanical face seal (duo-cone type) installed in the track roller, idler, and sprocket cavities of hydraulic excavator undercarriages. It provides reliable sealing performance under severe abrasive conditions, retaining lubricating oil while excluding mud, water, and debris. The seal dimensions are 292 mm outer diameter, 265 mm inner diameter, and 19 mm cross-section height. Metal rings are typically manufactured from wear-resistant cast iron alloy (e.g., 15Cr3Mo) hardened to 65-68 HRC. Elastomer components are typically NBR (Nitrile) or FKM (Fluoroelastomer) compatible with mineral hydraulic oils. Direct replacement for Hitachi EX120 series excavators; cross-references to Caterpillar E312B/E120B and Hyundai R120LC/R225/R215 applications.