Rexroth CDH1 MT4 Hydraulic Cylinder | ISO 6022 Heavy Duty 250/140/300 | 250 Bar High Pressure

LIC Hydraulic’s CDH1MT4 series represents the pinnacle of heavy-duty actuation technology, strictly adhering to ISO 6022 and DIN 24333 international standards. Designed for high-pressure environments, this 250-bar rated cylinder features the MT4 (Center Trunnion) mounting style, offering superior structural stability and fatigue resistance. Our CDH1 cylinders are 100% tested on simulated load beds to guarantee full interchangeability with original Rexroth units, delivering unparalleled reliability for steel mills, large presses, and demanding industrial automation.

Technical Specifications

• Model Code: CDH1MT4/250/140/300A3XB/B11CGDMW

• Standard Compliance: ISO 6022 / DIN 24333

• Mounting Style: MT4 (Center Trunnion)

• Bore Diameter: 250 mm

• Rod Diameter: 140 mm

• Stroke: 300 mm

• Nominal Pressure: 250 bar (25 MPa)

• Test Pressure: 375 bar (37.5 MPa)

• Cushioning: B (Adjustable cushioning at both ends)

• Sealing Type: G (Low-friction composite seal system)

• Fluid Compatibility: Mineral oils, HFC, and HFD fluids

Key Technical Advantages

• Global Interchangeability: Built to ISO 6022 specifications, ensuring a direct bolt-on replacement for existing systems worldwide, reducing inventory complexity.

• Advanced Rod Coating: The piston rod is induction-hardened and hard-chrome plated ($\ge 30\mu m$), providing maximum resistance to wear, scoring, and corrosive atmospheres.

• Superior Stick-Slip Resistance: The multi-component sealing system minimizes friction, ensuring smooth motion even at low speeds and high pressures.

• Efficient Kinetic Energy Absorption: The adjustable end-position cushioning (B) dissipates inertia at the stroke limits, preventing mechanical stress and noise.

Application Areas

• Steel & Metallurgy: Continuous casting machines, rolling mills, and ladle transporters.

• Heavy Press Technology: Forging presses, scrap balers, and injection molding units.

• Civil Engineering: Dam gate actuators and hydraulic hoist systems.

• Mining & Tunneling: Main propulsion cylinders for TBMs and heavy lifting rigs.

Expert Maintenance Tips

• Air Bleeding: Ensure all air is bled via the integrated bleed screws before full-load operation to prevent “diesel effect” and seal degradation.

• Case Drain & Filtration: Maintain system filtration at ISO 4406 19/16/13 to protect the precision-lapped internal surfaces.

• Rod Integrity: In abrasive environments, periodically inspect the rod surface and seal wipers to ensure environmental contaminants are not entering the cylinder chamber.