Interchangeable Compact Air Cylinders

Square Pancake® II

Pancake Quality and Performance in a Square Design

Square Pancake® II air cylinders meet the same standards of compact air cylinder quality as the Original Pancake and the Pancake II families. These direct interchange air cylinders in square form provide effective output motion with short strokes in a compact design.

Construction features include an impact-resistant interchangeable cylinder barrel made from high-strength composite and a self-lubricating cylinder wall. The smooth interior minimizes heat buildup, keeps friction low and prevents stick-slip that can hamper metallic cylinders. The stainless steel piston rods are plated with hard chrome to extend the lifetime of the cylinder, and the rod-bushing’s non-metallic high-performance composite provides high load-bearing capacity and resists harsh conditions.

The Square Pancake family is available in five standard styles and also includes a non-rotating series for applications requiring the load to stay in a fixed orientation during its linear movement. SND Series double-acting air cylinders come with two piston rods built into the cylinder head. The twin rods are bound by a rod end toolbar to hold the piston securely in place. This construction keeps the rods working in tandem, prevents parts from rotating around the rod axis and provides a convenient mounting surface for additional attachments.

Key Specifications

  • Available in a wide range of sizes
    • Standard: Seven bore sizes from ¾ to 2 inches and strokes to 4 inches
    • SND Series: Four bore sizes from ¾ to 2 inches and strokes to 4 inches
  • Self-lubricating composite body
  • Clear anodized aluminum alloy heads
  • Stainless steel tie bolts
  • Rod Bushing
    • Standard: composite
    • SND Series: bronze
  • Prelubed with Magnalube-G® grease
  • Chrome-plated stainless steel piston rods
  • Rod end toolbar (SND Series)
  • Air service to 200 psi
  • Minimum Recommended Operating Pressure: 15 psi
  • Temperature Ratings
    • cylinder: -25° to +225° F (-32° to + 121° C)
    • electronic sensors: -4° to +176° F (-20° to + 80° C)
  • Internally lubricated Buna-N seals
  • Many options available
  • Magnetic piston sensing available
Technical Advantages
  • Interchangeable composite cylinder barrel with stainless steel tie bolts and aluminum spacers that lock precision machined heads tightly into place.
  • High-strength high performance composite resists corrosion, moisture and temperatures up to 325° F, while offering a high load capacity and very little friction.
  • High impact resistance, minimizing failure caused by dings and dents.
  • Self-lubricating cylinder wall ensures high performance thanks to a smooth interior with low coefficient of friction to minimize heat buildup, eliminate stick-slip and extend seal life.
  • The hard chrome-plated stainless steel piston rod ensures long cylinder life.
  • The high performance composite piston rod bearing and shaft work together to ensure high reliability: Over the cylinder’s cycle life, the composite bearing — which carries 60,000 psi — polishes the hard chrome-plated shaft.
  • Magnalube G® Teflon-impregnated grease provides a long operating life and lubricates across a wide temperature range.
  • Buna-N O-rings are internally pre-lubed with Magnalube-G as standard. U-cup seals are also available.

Application Examples

  • Medical packaging machinery
  • Conveyors

Custom Solutions