Description

The Apex-HD Industrial Plunger is a precision-machined reciprocating rod engineered for extreme pressure generation. Manufactured from Hardened Alloy Steel or S45C Carbon Steel, it undergoes a specialized induction hardening and hard-chrome plating process to reach a surface hardness of HRC 50-55. This ensures the plunger can withstand millions of cycles against high-viscosity grease without scoring or losing its tight tolerance fit. The plunger works by creating a vacuum on the upstroke to draw grease in and a high-compression force on the downstroke to discharge it. Its mirror-finish surface (Ra