Product Detail

F Series

Quick Overview


NFPA Interchangeable

Max Operating Pressure: 250 PSI (17 bar)
Bore Size: 1.5 to 4 in (38 to 102 mm)

The F Series is a non-rotating, NFPA interchangeable pneumatic cylinder line that provides the solution to specific applications where piston rotation is not acceptable. Numatics' innovative dual rod design provides precision positioning and linear movement. This makes the F Series ideal for a multitude of high-tech applications.

Standard Specifications

  • Meets NFPA specifications
  • Bore sizes - 1-1/2” to 4” (38 to 102 mm)
  • Piston rod diameters - 5/16” to 3/4” (8 to 19 mm)
  • Maximum pressure rating - 250 PSI air (17 bar)
  • Standard temperature - -10 to +165 °F (-23 to +74°C)
  • All aluminum construction, except retaining plate and tooling plate (steel)
  • NPTF ports
  • Flexible port and cushion locations


The tube is hard coat anodized. The hard coating is an electro-chemical process which produces a very dense surface of aluminum oxide. This surface has extreme hardness (60 RC.), excellent wear and corrosion resistance, and a low coefficient of friction. Additionally, profile tubing is standard on 1-1/2” through 2-1/2” bore sizes (3-1/4” and 4” bores are the tie rod construction).

End Caps

The end caps are accurately machined from (6061-T6) solid aluminum bar stock. They are anodized for corrosion resistance. Additionally, a recess on the piston-mating surface (at both ends) enables the air to work on a larger piston area for effortless breakaway.

Rod Bushing

The F Series includes a graphite filled, cast iron rod bushing that is extra long in length. Graphite filling offers the best bearing surface when using a hard chrome plated piston rod. Cast iron provides maximum resistance against wear. The added length adds superior alignment and support of the piston rod as well as provides maximum load bearing support.

Rod Seal and Wiper

The unique rod seal and wiper combination is made with carboxilated nitrile with PTFE compound and is self-lubricating and durable. The rounded lip design ensures proper sealing and long life.

Piston Rod

High strength steel (100,000 psi minimum yield) piston rod has a ground, polished, and chrome plated surface. This surface provides maximum life for both the rod bushing and the seals.

Retaining Plate

The steel retaining plate has dual functions. It retains the bushing as well as inhibits rod rotation. Precise tolerances on both the bushing and the retaining plate allows for a exact fit which prevents rod rotation. By simply removing the four countersunk screws that maintain exact alignment, the orientation of the piston rod and tooling plate can be rotated 90° without cylinder disassembly.

Tooling Plate

The tooling plate is machined from solid steel. The tooling plate is reversible, offering both a flush or concentric mount.

Piston Seal

The piston seal is a carboxilated nitrile with PTFE compound for self-lubricating. The “T” seal with back-up ring construction prevents rolling and seals at all pressures.

Wear Band

The wear band is a stable, lubricating strip located on the piston. Numatics separated the load bearing points by locating the wear band at the rear of the piston. This maximizes column strength at full extension.


The solid aluminum alloy piston is strong and durable.

Cushion Seal

The floating cushion seal design enables rapid stroke reversal by providing instantaneous full flow to the piston. Each cushion has a flush, retained adjustment needle.

Tube End Seal

The tube end seals are compression type and reusable.


Numatics' enhanced port design enables the cylinder to work more efficiently. Through the use of precise machining depths and tool shape, they are able to smooth the flow path into and out of the cylinder.

Product Specifications