Hydraulic Cylinder

Product description

• Fully Assembled Cylinder Body: The main barrel containing the pre-installed piston, chrome rod, internal seals, head gland, and base cap. • Port Plugs: Plastic or metallic shipping plugs threaded into the fluid ports to prevent dust, moisture, and debris from entering the internal chambers during transit. • Mounting Hardware (Configuration Specific): Depending on the style ordered, this includes components like clevis pins, cotter pins, or flange bolts. • Quality Inspection Certificate: Documentation verifying factory pressure-testing (typically tested at 1.5 times the rated operating pressure) and quality clearance. • Instruction & Safety Manual: A guide covering storage, basic installation alignments, and initial air-bleeding procedures. ⚙️ Materials of Construction Hydraulic cylinders are engineered using heavy-duty, high-tensile materials to withstand extreme internal pressures (often ranging from 2,000 to 5,000+ PSI). • Cylinder Barrel (Tube): Made from ST52, E355, or ASTM A513 DOM (Drawn Over Mandrel) steel. The internal bore is honed and skived to a mirror-like finish (micro-inch roughness) to minimize seal friction. • Piston Rod: Machined from C45 or 4140 carbon steel, ground and polished, then treated with hard chrome plating (usually 20 to 30 microns thick) for maximum scratch and corrosion resistance. Induction-hardened rods are used for debris-heavy environments. • Piston & Gland (Head): Typically cast from ductile iron (Grade 65-45-12) or machined from carbon steel to provide excellent bearing support and prevent metal-on-metal galling against the steel tube. • Seals & O-Rings: High-performance elastomeric compounds chosen for fluid compatibility and temperature resistance. Common materials include Polyurethane (PU) for main U-cups, Nitrile (NBR) for static seals, and Fluorocarbon (Viton) for high-heat applications. 📏 Size & Dimension Metrics When ordering or specifying a hydraulic cylinder, its size is defined by four core dimensions: • Bore Diameter: The inner diameter of the cylinder barrel. This is the most critical metric because it determines the total force the cylinder can push or pull at a given system pressure. • Rod Diameter: The thickness of the chrome shaft. A thicker rod prevents bending under heavy compression loads but reduces the available fluid volume on the retraction (pull) side. • Stroke Length: The total distance the piston rod can travel from a fully retracted position to a fully extended position. • Retracted Length (Pin-to-Pin): The total distance between the center of the mounting holes when the cylinder is completely closed. This determines the spatial footprint required on your machinery. 🔧 Maintenance & Care Guidelines Proper care prevents premature seal failure, rod scoring, and fluid contamination—the leading causes of hydraulic system breakdowns. 🚿 Preventive Care • Keep the Rod Clean: Wipe down extended rods operating in abrasive environments (dust, sand, cement) to prevent debris from bypassing the wiper seal and entering the barrel. • Maintain Fluid Cleanliness: Filter your hydraulic oil regularly. Abrasive particulate matter suspended in the oil acts like sandpaper, rapidly destroying internal piston seals. • Check Alignments: Ensure the cylinder operates in a straight line. Side-loading or angular misalignment forces the rod against the head gland, causing uneven seal wear and bent rods. 🛑 Storage Practices • Retract Completely: Always store cylinders fully retracted so the polished piston rod remains protected inside the oiled barrel. • Grease Exposed Metal: If a cylinder must be stored extended or out in the open, coat the exposed chrome rod with a thick layer of anti-corrosion grease or protective wrap. • Keep Ports Sealed: Leave the shipping port plugs tightly installed until the exact moment you connect the hydraulic hoses to block moisture and airborne dust.

Specifications