Original Genuine New Guided Drive FESTO 170833 DFM-16-20-P-A-GF Engineered For Pneumatic Linear Motion Applications

The FESTO 170833 DFM-16-20-P-A-GF is a guided drive engineered for pneumatic linear motion applications that require compact construction, stable load guidance, and reliable resistance to lateral forces and moments. Official FESTO data identifies this model as part of the DFM series, with a 16 mm piston diameter, 20 mm stroke, double-acting operating mode, and a plain-bearing guide integrated into the actuator body. The same official datasheet lists a product weight of 507 g, which places it in a compact but mechanically robust class for industrial guided-drive applications.

In modern automation systems, a standard cylinder is often not enough when the load creates side forces, offset centers of gravity, or torsional moments. In those cases, a guided drive becomes the more appropriate solution because it combines the drive function and the guide function in one compact unit. The DFM-16-20-P-A-GF is designed exactly for that kind of duty. FESTO specifies a yoke drive unit, guidance design, and position detection via proximity switch, making it suitable for clamping, stopping, lifting, feeding, and short-stroke transfer tasks where stable and repeatable linear motion matters.

Key Technical Data

All values above are taken from FESTO’s official datasheet for part number 170833.

Product Overview

The DFM-16-20-P-A-GF is a compact linear actuator with an integrated guide system. That combination is the core reason this product exists. A conventional pneumatic cylinder can generate linear motion, but it is not intended to absorb significant side loads or bending moments without external guidance. The DFM series addresses that limitation by combining the actuator and guide into a single mechanical unit. For machine builders, this usually means fewer separate components, easier alignment, and a more compact overall design. That conclusion is an engineering inference, but it follows directly from FESTO’s identification of the product as a guided drive with integrated guidance and a plain-bearing guide.

The 20 mm stroke and 16 mm bore position this model as a short-stroke guided actuator intended for compact handling and positioning tasks rather than long-travel motion. This type of actuator is typically chosen when a machine needs a short, well-controlled linear movement with higher stability than a normal compact cylinder can provide. Examples include ejecting small workpieces, moving stops into position, aligning parts, or supporting clamping and feed motions inside compact tooling. These are application inferences, but they are consistent with the product’s guided-drive architecture, short stroke, and force class.

Guided Structure and Load Stability

One of the most important technical aspects of the DFM-16-20-P-A-GF is its ability to handle loads that are not perfectly centered. FESTO provides several load-related values, including a distance from centre of gravity of load to yoke plate xs of 50 mm, maximum force Fy of 304 N, maximum force Fz of 304 N, and maximum moments of 6.99 Nm for Mx and 2.89 Nm for both My and Mz. These figures are significant because they confirm that the actuator is intended to work with off-center loads and moment loads, not only with purely axial forces.

This is where the guided-drive design becomes genuinely useful. In many automation tasks, the load is attached on a tooling plate, bracket, stop arm, or small fixture rather than directly on the piston axis. That creates torque and transverse loading. A normal cylinder under those conditions would usually require an external guide unit. The DFM-16-20-P-A-GF integrates that capability into one body, which can reduce design complexity and improve compactness. Again, that is a functional engineering interpretation, but it is well supported by the official moment and side-load ratings published by FESTO.

Drive Performance

FESTO lists the actuator as double-acting, which means compressed air drives both the advance stroke and the return stroke. This is the standard and preferred arrangement for industrial motion where predictable behavior in both directions is required. The official datasheet specifies a theoretical force of 121 N on the advance stroke and 90 N on the return stroke at 6 bar. Those values make the DFM-16-20-P-A-GF suitable for a broad range of compact-duty industrial functions where moderate force and stable guided motion are needed.

The actuator also supports a maximum speed of 0.8 m/s, which is a useful figure for short-stroke applications where cycle time matters. In many small automation modules, speed is limited not by available air pressure alone, but by guide stability, end cushioning, and the ability to stop without excessive shock. FESTO addresses this with elastic cushioning rings/plates at both ends, which helps reduce impact energy at the end positions. The datasheet lists impact energy in end positions of 0.15 Nm, reinforcing that this is a compact actuator intended for controlled industrial cycling rather than brute-force impact motion.

Guide Type and Practical Meaning

This exact version uses a plain-bearing guide, and that detail matters. Guided actuators in the DFM family may be available in different guide configurations, but the -GF variant here is officially identified as having a plain-bearing guide. Plain-bearing guidance is generally chosen when the application values robustness, simplicity, and tolerance of standard industrial conditions, rather than the lowest possible friction or the highest recirculating-ball precision. That is an engineering interpretation, but it is a standard reason why plain-bearing guide variants are selected in practice.

For many machine builders, a plain-bearing guided drive is a practical solution in applications involving stopping, pressing, feeding, clamping, or guiding components through a short linear path. It may also be preferred where contamination resistance and mechanical ruggedness are more important than ultra-high guide sensitivity. Since FESTO explicitly identifies this actuator as plain-bearing guided, that is the correct technical positioning for the product.

Weight and Installation Value

Your requirement specifically includes product weight, and for the FESTO 170833 DFM-16-20-P-A-GF, the official FESTO datasheet lists a product weight of 507 g. FESTO also lists a moving mass of 242 g. These are useful values because they tell the designer not just how heavy the component is overall, but also how much mass is involved in dynamic movement.

From a practical design perspective, 507 g is a reasonable weight for a guided pneumatic actuator in this bore and stroke class. It is light enough for compact machine assemblies and moving modules, but substantial enough to reflect a real structural guide system rather than a miniature unsupported cylinder. For automation designers, this balance is important: too light can mean insufficient structural capacity, while too heavy can slow down dynamic systems. The DFM-16-20-P-A-GF sits in a technically credible middle range for short-stroke guided motion. That last point is interpretive, but it is grounded in the published weight, force, and moment data.

Materials and Construction

FESTO lists the cover and housing materials as wrought aluminium alloy, the seals as NBR, and the piston rod as high-alloy stainless steel. This material package is typical of industrial pneumatic actuators intended for durability, corrosion resistance under standard factory conditions, and controlled weight. Aluminium alloy helps keep the structure rigid without making the unit unnecessarily heavy, while stainless steel on the rod area supports wear resistance and long-term mechanical reliability.

The actuator is also listed as RoHS-compliant, with CRC 1 corrosion resistance and LABS (PWIS) conformity VDMA24364-B1/B2-L. FESTO further states cleanroom suitability Class 6 according to ISO 14644-1. These points matter because they indicate a product designed for disciplined industrial use and compatibility with applications where material behavior and contamination control may matter.

Environmental and Operating Conditions

The official operating pressure range is 2 bar to 10 bar, and the operating medium is compressed air to ISO 8573-1:2010 [7:4:4]. FESTO also notes that lubricated operation is possible, but once lubrication is used, it must continue to be used. This is a standard pneumatic rule and relevant for maintenance planning.

The ambient temperature range of -20 °C to 80 °C is relatively broad for this class of actuator and supports use in mainstream industrial environments. FESTO also lists mounting position optional, which gives designers flexibility in how the guided drive is integrated into the machine. That matters in compact automation, where layout constraints often dictate actuator orientation.

Typical Application Areas

These applications are consistent with the official bore, stroke, guide type, force, and moment ratings published by FESTO.

Conclusion

The FESTO 170833 DFM-16-20-P-A-GF is a compact and mechanically capable guided drive for industrial automation tasks that require short-stroke linear motion with integrated load guidance. Official FESTO data identifies it as a 16 mm bore, 20 mm stroke, double-acting actuator with a plain-bearing guide, 2 to 10 bar operating pressure, 121 N theoretical advance force at 6 bar, and a product weight of 507 g. Its combination of guided stability, compact structure, and meaningful moment-load capacity makes it a practical choice for clamping, stopping, positioning, and short-transfer duties in space-limited machine designs.