Overview and Key Specifications
The Festo DSBC-125-40-D3-PPSA-N3 is a double-acting pneumatic cylinder designed for applications requiring reliable linear motion in a compact footprint. With a 125 mm piston diameter and a 40 mm stroke, this unit delivers substantial force: theoretical force at 6 bar is 7363 N advancing and 6881 N retracting. The cylinder conforms to ISO 15552, ensuring interchangeability and compliance with widely accepted dimensional standards. Its profile barrel design, combined with a piston rod featuring an external M27x2 thread, provides a robust solution for pushing, pulling, or lifting tasks in automated machinery.
The cylinder operates within a pressure range of 0.2 to 10 bar and is suitable for ambient temperatures from -20°C to 80°C. It is designed for use with compressed air per ISO 8573-1:2010 [7:4:4], and oil lubrication is possible if required for downstream processes. The unit is RoHS-compliant and meets LABS (PWIS) conformity to VDMA24364-B1/B2-L, making it suitable for use in paint shops and other sensitive environments.
Precision Control and Position Sensing
One of the standout features of the DSBC-125-40-D3-PPSA-N3 is its self-adjusting pneumatic end-position cushioning. This system automatically tunes the cushioning effect to the load and speed, reducing impact energy (rated at 3.3 J in the end positions) and minimizing wear. The cushioning length is 45 mm, providing ample deceleration travel to protect both the cylinder and the driven load.
The D3 designation indicates sensor slots on three sides of the profile barrel, allowing for flexible mounting of proximity sensors. This enables precise piston position sensing, which is critical for applications requiring accurate mid-stroke positioning or end-position confirmation. The ability to mount sensors on multiple sides simplifies integration into existing control systems and facilitates adjustments during machine setup.
Durability and Environmental Resistance
Constructed with high-quality materials, this cylinder is built to withstand demanding industrial environments. The cylinder barrel is made of smooth-anodized wrought aluminum alloy, while the piston rod is high-alloy steel for strength and resistance to bending. Covers are die-cast aluminum with a protective coating, and seals are made of TPE-U(PU) for durability and low friction. The bearing uses a metal-polymer compound, reducing wear and extending service life.
The corrosion resistance class (CRC) is rated at 2, indicating moderate corrosion stress capability. This makes the cylinder suitable for typical factory floor conditions, including occasional exposure to coolants or mild chemicals. The robust construction, combined with the self-adjusting cushioning, ensures reliable operation over many cycles, reducing downtime and maintenance costs.
Mounting Flexibility and Integration
The DSBC-125-40-D3-PPSA-N3 offers versatile mounting options. It can be mounted in any position, and the type of mounting is optional: either via internal threads or with accessories. This flexibility is particularly valuable for decentralized applications where the cylinder must be integrated into larger systems with limited space. The ability to mount the valve laterally (as indicated by the mounting position feature) further enhances its suitability for modular or distributed automation architectures.
The cylinder has a pneumatic connection of G1/2, which is a common port size for this bore diameter, simplifying piping and fitting selection. The moving mass at 0 mm stroke is 2245 g, with an additional 63 g per 10 mm of stroke, while the basic weight is 6768 g plus 247 g per 10 mm stroke. These figures are important for calculating dynamic loads and selecting appropriate guide rails or support structures.
Practical Considerations for Engineers and Buyers
When specifying this cylinder, engineers should note that the piston rod end is an external thread (M27x2), which is standard for ISO 15552 cylinders. The unit is double-acting, meaning it requires compressed air for both extension and retraction, providing controlled motion in both directions. The operating medium is compressed air, and the cylinder is designed for use with proximity sensors, but sensors are not included and must be ordered separately.
For procurement teams, the manufacturer part number is 8165675, and the product part number is DSBC-125-40-D3-PPSA-N3. The cylinder is available with a piston rod at one end only, which is the standard variant. It is important to verify that the stroke length and force requirements match your application, as the 40 mm stroke is relatively short for a cylinder of this bore size. If higher corrosion resistance is needed, consider alternative models with a higher CRC rating, as this unit is rated for moderate stress only.