English 
Spanish 
What are chrome plated rods and piston rods?
Today, we’ll explain their differences, connections, and recommended choices!
1. What is chrome-plated rod?
Chrome-plated rod, also known as high-precision chrome-plated smooth-axis rod, is a round steel bar that has been precision-turned, quenched-tempered, ground, and then hard-chromium-plated.
Key Features:
High surface finish (Ra 0.2-0.xn--4m-99b)
High chrome hardness (HRC 58-65)
Precise tolerances (commonly h6 and h7,f7)
Can be widely used in guiding, supporting, sliding, and other structural components
✅ Applications: Mechanical guide rails, automated slides, hydraulic guide systems, etc.
2. What is a piston rod?
The piston rod is the primary force-transmitting component in hydraulic and pneumatic cylinders that connects to the piston and enables reciprocating motion.
While its basic material and appearance are similar to chrome-plated rods, piston rods typically require:
Internal bore machining, thread turning, and step design
Machining of end connections to accommodate equipment installation
Higher fatigue resistance and sealing compatibility are required
✅ Application scenarios: Hydraulic systems, construction machinery, metallurgical equipment, etc.
3. What are their key differences?
Summary in one sentence
The chrome-plated rod is the “base material,” while the piston rod is the “functional component.”
The chrome-plated rod can be used as the raw material for the piston rod, but it is not the piston rod itself!
