The Durable Kobelco SK110-4 Excavator Top Roller (also known as carrier roller or upper roller) is a precision-engineered undercarriage component designed specifically for Kobelco SK110-4 and compatible SK100/SK120 series hydraulic excavators. Positioned at the top of the track frame, the top roller supports the upper portion of the track chain, maintains proper track alignment, prevents excessive track sagging, and ensures stable machine operation during travel and work cycles.

Manufactured from high-grade 50Mn alloy steel through precision forging, CNC machining, and heat treatment processes, this top roller delivers exceptional structural integrity and impact resistance. The roller surface undergoes advanced induction hardening, achieving a surface hardness of HRC 50-56 with a deep, uniform hardened layer that ensures outstanding wear resistance and extended service life. The core maintains internal ductility to withstand heavy shock loads without cracking.

The top roller features advanced double-cone sealing technology that provides maintenance-free operation by preventing ingress of mud, sand, water, and abrasive fines. Heavy-duty bi-metallic bearings ensure smooth rotation and extended service life. A precision-machined smooth surface minimizes friction against the track chain and reduces premature wear.

Engineered for the Kobelco SK110-4—an 11-ton class excavator with an operating weight of approximately 11 tons, track width of 450-500mm, and 66 HP (48 kW) engine power—this top roller delivers the durability and performance needed for construction, landscaping, and utility applications.