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Rexroth CDT3ME6 50 36 100F11 B11HHDTWW Hydraulic Tie-Rod Cylinder
Overview
The Rexroth CDT3ME6 50 36 100F11 B11HHDTWW is a high-quality, metric industrial hydraulic tie-rod cylinder from the Bosch Rexroth CDT3 Series. Designed as a CD single-rod differential cylinder with a robust tie-rod construction, this model reliably converts hydraulic energy into precise linear mechanical motion for a wide range of demanding industrial applications.
Engineered as part of the T3 series, Component Series 3X (with unchanged installation and connection dimensions), this cylinder is manufactured according to ISO 6020/2, DIN 24554, and NF/ISO 6020/2 international standards, ensuring global mechanical compatibility and easy integration into new or existing hydraulic systems.
Technical Features
Robust Tie-Rod Construction with Integrated Guide Socket — The cylinder employs a lightweight yet durable tie-rod design that simplifies assembly and service. A precisely machined, one-piece cylinder head integrates the piston rod guide socket-. This integrated design simplifies maintenance while contributing to the cylinder’s significantly extended service life — up to five times longer than conventional tie-rod cylinders.
Reliable Pressure Ratings — The cylinder is rated for a nominal operating pressure of 160 bar (16 MPa), which is standard for the CDT3 series. The entire series from Bosch Rexroth is designed to meet rigorous safety standards with a static test pressure of 240 bar (24 MPa).
ME6 Bottom Flange Mounting — The “ME6” in the model code denotes a mounting style featuring a rectangular flange located on the cylinder bottom (base). This provides a secure, stable attachment method, making the cylinder ideal for applications where the base needs to be firmly fixed to the machine frame.
Compact Specifications (50 mm Bore, 36 mm Rod, 100 mm Stroke) — This specific model features a 50 mm piston diameter and a 36 mm piston rod diameter, with a standard stroke length of 100 mm. The entire CDT3 series supports piston diameters from 25 mm to 200 mm, piston rod diameters from 12 mm to 140 mm, and stroke lengths up to 3,000 mm. For strokes up to 1250 mm, the cylinder is manufactured to a stroke length tolerance of 0/+2 mm according to ISO 6020.
Hard Chromed Piston Rod — The piston rod features a hard chrome-plated surface (Type C). This durable finish provides excellent wear resistance, a high surface hardness, and enhanced protection against corrosion, ensuring a long service life under demanding conditions. This aligns with the brand's known standard of using high-strength materials and precision manufacturing processes to ensure durability and low leakage.
High-Strength Materials and Processing — The cylinder is manufactured from high-strength materials featuring precision-engineered tolerances. The piston rod end is configured with a thread for a hinge lug (Type H). The product is tested according to Bosch Rexroth standards and ISO 10100:2001 to ensure quality and reliability.
Adjustable End-Position Cushioning on Both Sides — The cylinder is equipped with adjustable end- position cushioning on both the head and cap ends (Type D). This progressive damping system allows for controlled deceleration of the piston as it approaches the end of its stroke. The progressive damping system provides benefits such as progressive delay, short damping time, and damping length dependent on speed, with low cushioning pressure resulting in minimal pressure peaks, enhancing the safety and increasing the lifecycle of both the cylinder and the machine. The adjustable version "E" (with throttle valve) is also available for optimizing cycle times, though Type "D" self-adjusting cushioning is standard on this model.
Standardized Porting & Sealing — The ports conform to ISO 1179 (B port type) with G 1 1/2 pipe threads. The pipeline joint positions for both the head and bottom are located on the same side (upper side when viewed from the piston rod end), which simplifies plumbing. The standard sealing system (Type T) is compatible with mineral oils (HL, HLP) and HFA emulsions. The entire series is designed with a high-quality seal system that is easy to service and ensures low leakage for reliable operation.
Comprehensive Corrosion Protection (R1 Class) — The cylinder features a robust corrosion protection system rated R1 (Grade I). This includes a 240-hour salt spray test (SST per DIN EN ISO 9227) and a 240-hour condensation test (KKT per DIN EN ISO 6270), with a minimum dry film thickness of 40 μm and a standard primer color of Gentian blue (RAL 5010). This ensures reliable performance even in harsh or corrosive industrial environments.
Patented Safety Venting Valve — The cylinder includes a patented safety venting device for easy and safe air bleeding from the hydraulic system-25. This feature allows trapped air to be safely released, preventing potential damage from air pockets in the fluid.
Low Minimum Operating Pressure — For a single-rod differential cylinder like this, a minimum pressure of 10 bar is recommended for no-load operation and 20 bar for loaded conditions to ensure proper functionality.
Flexible Mounting Configuration — The CDT3 series supports thirteen different mounting configurations in total, including the "ME5" (rectangular flange on cylinder head) alongside "ME6". The series also supports a variety of other mounting types like MP5, MS2, MT4, and more, providing significant flexibility for engineers.
Key Functionalities
Linear Force Conversion & Controlled Bi-directional Motion — The cylinder efficiently converts hydraulic energy (pressure and flow) into mechanical linear force and motion. As a double-acting differential cylinder, when the piston areas on both sides are pressurized, it can achieve differential operation for efficient stroke control-. The direction of motion (extension or retraction) is controlled by pressurizing either the cap side or the rod side, allowing for precise, bidirectional positioning.
Smooth Deceleration via Adjustable End Cushioning — A critical function of the cylinder is its adjustable, progressive end-position cushioning system. The integrated damping mechanism smoothly decelerates the piston as it approaches the stroke ends, reducing impact and eliminating hard stops that can generate damaging shock loads and noise. This function protects both the cylinder and the connected machinery, increasing overall system safety and lifespan.
Precise Position Control — The combination of precision engineering, a hard chrome-plated rod, and the ability to adjust the cushioning allows for accurate and controlled movement of the piston. This makes the cylinder suitable for positioning heavy loads with precision in applications such as machine tools and process lines.
Reliable Performance & Long Service Life — The robust tie-rod construction, the heavy-duty one-piece integral piston rod guide, the high-quality seals, the R1-class corrosion protection, and the shock-reducing cushioning system ensure high reliability and minimal maintenance requirements. These features work together to give the cylinder a service life of up to five times that of conventional cylinders, resulting in reduced machine downtime and lower total cost of ownership.
Easy Integration & Maintenance — Conforming to global ISO standards, the cylinder has standard installation and connection dimensions, making it easy to integrate into new or existing hydraulic systems. The tie-rod design itself makes the cylinder easy to service, and the standard sealing system further simplifies maintenance tasks.
Safe Operation — The inclusion of a patented safety venting valve allows for the safe and easy purging of air from the system, while the progressive cushioning system prevents dangerous pressure spikes as the piston reaches the end of its travel, both contributing to safe machine operation.
Application Sectors
The Rexroth CDT3ME6 50 36 100F11 B11HHDTWW hydraulic cylinder is designed for a vast array of medium- duty industrial and mobile applications where precise, reliable, and powerful linear motion is required. The entire CDT3 series is widely used as part of a customizable linear drive solution, tailored from a modular platform.
| Industry Sector | Typical Applications |
|---|---|
| General Industrial Machinery | Conveyor systems, lifting equipment, general factory automation, assembly line actuation, test rigs, positioning tasks in medium to heavy-duty industrial environments. |
| Construction & Civil Engineering | Actuators in small to medium construction machinery (excavators, loaders, backhoes), material handling attachments, and equipment where heavy loads need to be lifted or moved in demanding conditions. |
| Machine Tools & Manufacturing | Clamping units for workpieces, feed mechanisms on CNC machines, tool changers, hydraulic presses, and injection molding machines for tasks requiring precise control and reliable force. |
| Material Handling & Logistics | Hydraulic lifts, scissor lifts, pallet stackers, dock levelers, port machinery, and automated guided vehicles (AGVs) requiring durable and reliable linear actuation for load transfer and positioning. |
| Metallurgy & Heavy Industry | Rolling mills, continuous casting lines, cutoff shears, and heavy presses on production lines requiring robust cylinders that can withstand extreme loads, shocks, and high operating temperatures. |
| Steel & Metal Processing | Scrap shears, straightening presses, bending machines, and material handling in steel mills and metal fabrication shops. |
| Mining Equipment | Conveyor drives and material handling systems in mining environments where heavy loads need to be moved by a durable hydraulic component. |
| Marine & Offshore | Hydraulic steering gear, hatch covers, cargo handling systems, and stabilizer fin actuators requiring high corrosion resistance for operation in a marine environment. |
| Ceramic & Refractory Industry | Tile presses, brick presses, refractory material presses, and heavy ceramic hydraulic presses requiring reliable, high-force actuation in dusty conditions. |
| Plastics & Rubber Processing | Mold closing and ejector systems on injection molding machines, blow molding equipment, rubber processing presses requiring reliable cycles and robust construction for continuous production. |
| Paper & Pulp Industry | Paper mill machinery and pulp processing equipment requiring durable hydraulic actuation in wet and demanding environments. |
| Agriculture & Forestry | Section control on heavy agricultural equipment (balers, forage harvesters), forestry machinery (log splitters, harvesters), and manure handling systems requiring reliable, high-force actuation in outdoor conditions. |
| Aerospace Ground Support | Aircraft jacks, hydraulic test stands, cargo loaders, and ground handling equipment requiring high reliability and powerful, controlled linear motion. |
| Petroleum & Petrochemical | Valve actuators, blowout preventers, drilling equipment, and mud pumps requiring reliable and safe hydraulic actuation in oilfield and petrochemical processing facilities. |
| Power Generation | Hydroelectric dam gate actuators, coal handling equipment, and thermal power plant hydraulic systems requiring robust and long-lasting hydraulic cylinders. |
| Municipal & Environmental | Garbage truck packer blades, street sweeper brushes, snowplow angle cylinders, and wastewater treatment valves requiring reliable outdoor actuation. |
Performance Specifications
| Specification | Value |
|---|---|
| Manufacturer | Bosch Rexroth |
| Series | CDT3 (Tie-Rod Cylinder), T3 Style, Component Series 3X (30-39) |
| Model Code | CDT3ME6 50 36 100F11 B11HHDTWW |
| Cylinder Type | CD – Single-rod differential hydraulic cylinder |
| Action | Double-acting |
| Mounting Type | ME6 – Rectangular flange on cylinder bottom (base) |
| Piston Diameter (Bore) | 50 mm |
| Piston Rod Diameter | 36 mm |
| Stroke Length | 100 mm |
| Nominal Pressure (Continuous) | 160 bar (16 MPa) |
| Maximum Pressure (Static Load) | 210 bar (21 MPa) |
| Static Test Pressure | 240 bar (24 MPa) |
| Applicable Standards | ISO 6020/2, DIN 24554, NF/ISO 6020/2 |
| Design Principle | Z – Cylinder head and bottom connected by tie rods |
| Piston Rod Type | C – Hard chrome-plated |
| Piston Rod End | H – Threaded for hinge lug (CGAS) |
| End Cushioning | D – Adjustable end-position cushioning on both sides (progressive damping system) |
| Port Type | B – ISO 1179-1 (pipe thread ISO 228-1) |
| Port Size | EE = G 1 1/2 |
| Pipeline Joint Positions | 1 (head) / 1 (bottom) – upper side when viewed from piston rod end |
| Sealing Type | T – Standard sealing system (mineral oils HL, HLP, HFA) |
| Sealing/Option | W – No additional option |
| Corrosion Class | R1 (Grade I – 240h SST, 240h KKT, 40 μm dry film) |
| Finish | Standard primer, Gentian blue (RAL 5010) |
| Minimum Pressure (No Load) | 10 bar |
| Minimum Pressure (Loaded) | 20 bar |
| Stroke Length Tolerance (≤1250 mm) | 0/+2 mm according to ISO 6020-2 |
| Fluid Compatibility | Mineral oils (HL, HLP), HFA emulsions |
| Fluid Cleanliness Requirement | ISO 4406 (c) class 20/18/15 |
| Cylinder Weight | Approx. 3.1 kg [10†L39] |
| Maximum Operating Pressure | 250 bar (applicable for certain hydraulic fluids) [10†L37] |
Conclusion
The Rexroth CDT3ME6 50 36 100F11 B11HHDTWW is a precision-engineered, reliable, and durable hydraulic tie-rod cylinder that exemplifies Bosch Rexroth's manufacturing excellence. Its robust ME6 bottom flange mounting, compact yet powerful specifications, and essential features like a hard chrome-plated rod and adjustable double-sided progressive cushioning make it a versatile and powerful linear actuator.
Designed for a nominal pressure of 160 bar, it is well-suited for a vast spectrum of medium-duty industrial and mobile applications, including machine tools, presses, construction equipment, material handling systems, steel mills, ceramic presses, and paper machinery.
Compliant with ISO 6020-2 and DIN 24554, this cylinder offers global mechanical interchangeability and easy integration. The integrated guide socket simplifies maintenance, while the R1 class corrosion protection ensures long-lasting performance even in demanding environments. With a service life of up to five times that of a conventional tie-rod cylinder, this product provides a low total cost of ownership. Its ability to deliver smooth, controlled, high-performance linear motion makes it a dependable choice for engineers and system integrators worldwide.
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