CYM1MT4/80/45/135 Hydraulic Cylinder Rexroth CYM1 Series

Product Overview

The CYM1MT4/80/45/135A20/B11CGUMS37324 Hydraulic Oil Cylinder belongs to the heavy-duty Bosch Rexroth CYM1 tie-rod industrial cylinder series (cross-compatible across CYM1MP5, CYM1MT4, and CYM1MF1 mounting options). 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 barrel, an induction-hardened hard-chrome-plated piston rod, and an advanced low-friction sealing package with adjustable end-position cushioning. Every cylinder undergoes 100% factory simulated load pressure testing prior to shipment, guaranteeing zero fluid bypass, precise motion control, and long-term operating reliability under severe industrial conditions.

Technical Specifications

• Full Model Code: CYM1MT4/80/45/135A20/B11CGUMS37324 (Compatible series: CYM1MP5, CYM1MT4, CYM1MF1)

• Bore Diameter: 80 mm

• Piston Rod Diameter: 45 mm

• Stroke Length: 135 mm

• Nominal Operating Pressure: 16 MPa (160 bar)

• Peak Shock Pressure: 21 MPa (210 bar)

• Mounting Style: MT4 (Intermediate Trunnion mount; interchangeable with MP5 bottom cap clevis & MF1 head flange)

• Port Thread / Connection: G 1/2″ (A20 / B11 standard port layout)

• Cushioning & Seal Package: Adjustable progressive cushioning on both ends (CG), with high-wear Viton/Polyurethane sealing combo (UMS37324)

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

• Net Weight: Approx. 18.5 kg

Key Technical Advantages

• 100% Drop-In ISO/DIN Interchangeability: Envelope dimensions, trunnion pin diameters, port threads, and tie-rod configurations match ISO 6020/2 specifications precisely for seamless direct installation without machine modification.

• 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 high pressure surges.

• 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 machines, rolling mill guide positioning, and heavy clamping actuators.

• Plastics & Injection Molding: Mold core-pulling mechanisms, high-pressure ejector systems, and auxiliary hydraulic circuits.

• Industrial Presses & Factory Automation: CNC hydraulic clamping systems, forging press auxiliary cylinders, and heavy automated lifters.

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

Expert Maintenance Tips

• Prevent Side Loading: Ensure precise physical alignment between the cylinder rod axis 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.