EAST AI Hydraulic Manufacturer
Since 2006
A hollow ID honed H8 chrome plated rod is a precision-engineered steel bar with a hollow core, internally honed to H8 tolerance, and externally coated with hard chromium plating.
The internal honing ensures accurate dimensional tolerance and smooth bore, while the chrome plating provides excellent surface hardness, wear resistance, and anti-corrosion properties.
This type of rod is widely used in hydraulic cylinder applications, pneumatic actuators, and other mechanical systems where reduced weight and high precision are essential.
They combine the benefits of hollow piston rods, honed tubes, and chrome plated shafts into one product.
The hollow structure reduces overall weight, making machinery more energy-efficient without compromising strength.
The H8 tolerance ensures precise internal diameter, which is essential for smooth hydraulic cylinder operation.
The chrome plating layer delivers high hardness, improved surface finish, and long-lasting protection against rust, pitting, and abrasion.
These rods are typically manufactured from high-quality carbon steel or alloy steel such as CK45, ST52, 42CrMo4, or SAE1045.
The choice of material depends on application requirements such as tensile strength, fatigue resistance, and machinability.
In special cases, stainless steel can also be used to provide superior corrosion resistance in marine or chemical environments.
They are primarily used in hydraulic cylinder barrels and piston rods for heavy-duty machinery.
Applications include construction equipment, agricultural machinery, mining machines, and lifting platforms.
They are also applied in pneumatic cylinders, telescopic cylinders, and industrial automation systems.
Due to their lightweight yet strong design, they are especially useful in mobile machinery that requires efficiency and durability.
The inner bore is honed to H8 tolerance, ensuring precise dimensional accuracy and smooth piston movement.
This reduces friction and enhances the sealing performance of hydraulic systems.
The chrome plated surface typically reaches hardness levels of HRC 15–62.
This ensures excellent wear resistance and long service life in hydraulic cylinders.
Available in lengths up to 15 meters or custom sizes based on customer requirements.
This flexibility supports both standard and special hydraulic cylinder designs.
The external chrome plated surface is finished to Ra ≤ 0.2μm, ensuring smooth sliding performance and reduced seal wear.
The honed inner bore also meets high-quality finish standards for hydraulic precision.
Straightness tolerance is typically ≤ 0.2/1000mm.
This accuracy guarantees stable performance even under high load and pressure.
Solid chrome plated rods are fully solid bars coated with chrome, providing maximum rigidity and strength.
Hollow ID honed H8 chrome plated rods, by contrast, reduce weight through the hollow core and offer additional precision due to the honed bore.
They are easier to machine, more cost-efficient in large diameters, and provide better energy efficiency in mobile equipment.
The choice depends on whether maximum rigidity or reduced weight with high accuracy is required.
Routine inspection is essential to check for scratches, corrosion, or pitting on the chrome surface.
The inner honed bore should be kept clean to prevent contamination that may damage seals.
Proper lubrication in hydraulic systems reduces friction and prevents premature wear.
Before installation, rods should be stored in a dry environment with protective coatings to avoid rust.
Regular seal replacement and use of clean hydraulic oil further extend their lifespan.
Yes, they can be tailored to specific project requirements.
Customization includes inner diameter, outer diameter, wall thickness, tolerance level, hardness, and length.
Special coatings, such as nickel-chrome plating or induction hardening, are available for extreme environments.
OEM manufacturers often request custom-designed rods for specialized hydraulic cylinders, pneumatic actuators, and marine applications.
EAST AI Hydraulic Manufacturer
Since 2006
