CDM1MP5/80/56/250 Rexroth Hydraulic Cylinder

Product Overview

The CDM1MP5/80/56/250A10/B1CGDMWW Heavy Duty Hydraulic Oil Cylinder belongs to the Bosch Rexroth CDM1/CD250 industrial product family (cross-compatible across CD250B100/56-1600B10/0TCADMA and related high-pressure cylinder configurations). Manufactured strictly in compliance with ISO 6020/2 and DIN 24554 standards, this cylinder offers 100% direct drop-in interchangeability with original equipment. It features a precision-honed seamless steel cylinder tube, an induction-hardened hard-chrome-plated piston rod, and an advanced low-friction DMWW sealing package with adjustable end-position progressive cushioning. Every cylinder undergoes 100% factory simulated load pressure testing prior to shipment, guaranteeing zero fluid bypass, precise displacement control, and long-term operating reliability under severe industrial conditions.

Technical Specifications

• Full Model Code: CDM1MP5/80/56/250A10/B1CGDMWW (Cross-compatible series: Rexroth CDM1, CD250, CD250B)

• Bore Diameter: 80 mm

• Piston Rod Diameter: 56 mm

• Stroke Length: 250 mm

• Design Component Series: A10 / Series 1X

• Nominal Operating Pressure: 16 MPa (160 bar), up to 25 MPa (250 bar) for heavy-duty cross configurations

• Peak Shock Pressure: 25 MPa (250 bar)

• Max Velocity: 0.5 m/s

• Mounting Style: MP5 (Rear clevis with spherical plain bearing, ISO 6020/2)

• Port Thread Connection: Port B1 (G 3/4″ ISO 1179-1 thread)

• Cushioning & Seal Package: Progressive adjustable cushioning on both ends (CG), with high-wear Viton/Polyurethane sealing combo (DMWW)

• Operating Temperature Range: -20°C to +120°C

• Net Weight: Approx. 22.5 kg

Key Technical Advantages

• 100% Drop-In ISO 6020/2 Interchangeability: Spherical plain bearing dimensions, pin hole tolerances, stroke lengths, and port thread configurations match OEM specifications precisely for seamless direct substitution.

• Precision-Honed Tube & Hard Chrome Rod: Super-finished cylinder barrel interior ($Ra \le 0.2\ \mu\text{m}$) combined with an induction-hardened, chrome-plated piston rod ($\ge 25\ \mu\text{m}$ coating thickness) prevents premature seal wear and mechanical scoring.

• Anti-Stick-Slip Low-Friction Sealing: Premium Polyurethane and PTFE guide ring systems minimize breakaway friction, eliminate low-speed stick-slip motion, and maintain zero internal leakage under 25 MPa pressure spikes.

• 100% Full-Load Factory Pressure Tested: Every cylinder is subjected to dynamic full-stroke cycling and static high-pressure holding tests to verify structural integrity and dampening performance prior to dispatch.

Application Areas

• Metallurgy & Steel Mills: Continuous casting cut-off actuators, rolling mill guide positioning, and heavy clamping systems.

• Industrial Presses & Heavy Machinery: Forging press auxiliary cylinders, metal shearing machinery, and high-pressure forming equipment.

• Plastics & Injection Molding: High-tonnage injection molding mold-clamping auxiliaries, core-pulling, and ejection circuits.

• Heavy Equipment & Power Units: Hydraulic power unit (HPU) positioning, gate opening systems, and high-pressure locking mechanisms.

Expert Maintenance Tips

• Prevent Side Loading: Ensure precise physical alignment between the spherical plain bearing mount and the driven load path during installation. Side loading causes uneven guide bushing wear and accelerates rod seal degradation.

• Bleed Trapped Air: Always bleed trapped air using the air-bleed ports or by cycling the cylinder back and forth 3-5 times under low pressure without load during initial setup to prevent aeration and unstable motion.

• Maintain Fluid Cleanliness: Maintain system oil cleanliness to ISO 4406 18/16/13 (or NAS 8) or cleaner. Ensure a high-efficiency pressure line filter is installed upstream to trap particulate contamination.