Extension Rod / Pony Rod

The Pony Rod serves as the vital link between the mud pump power end and the fluid end. Forged from premium 4140 alloy steel and strictly heat-treated, it possesses extremely high tensile strength and fatigue resistance. The surface is precision-ground and chrome-plated for high hardness and corrosion resistance, preventing media leakage and seal wear caused by surface roughness. Strictly adhering to API 7K standards, it ensures stable operation under harsh reciprocating loads without fracture or severe deformation.