Overview
The Compact Air Products S118X312 TR is a standard-duty pneumatic cylinder designed for applications requiring precision, durability, and space efficiency. Built by Compact Air Products, a manufacturer specializing in compact air cylinders from 3/4″ to 8″ bore, the S118X312 TR combines a precision-machined bore with workhardened aluminum construction. The “TR” designation indicates threaded (NPT) ports, making installation straightforward in standard industrial systems.
Key Features
- Double-acting piston-rod design for push and pull force in both directions
- Precision-machined bore with hard-anodized aluminum housing for corrosion resistance and extended service life
- Low-friction, high-concentricity bore geometry reduces wear and extends cylinder life across millions of cycles
- Threaded (TR) port configuration for NPT connections
- Compact envelope design—up to 60% smaller than conventional cylinders, ideal for robotics, clamping fixtures, and parts feeders
- Available new in open-box condition, ready for immediate use
Technical Specifications
| Model | S118X312 TR |
| Manufacturer | Compact Air Products |
| Bore Diameter | 1-1/8″ (28.6 mm) |
| Stroke | 3-1/2″ (88.9 mm) |
| Cylinder Type | Double-Acting Pneumatic |
| Port Configuration | Threaded NPT (TR suffix) |
| Housing Material | Hard-Anodized Aluminum |
| Rod Material | Stainless Steel (ground and polished) |
| Seals | Buna-N O-rings (standard) |
| Mounting | NFPA-compatible flanges (standard) |
| Condition | New – No Box |
Typical Applications
The S118X312 TR is well-suited for:
- Robotics and automated assembly equipment
- Clamping and holding fixtures
- Parts feeders and material handling systems
- Packaging machinery
- Medical device manufacturing
- Semiconductor equipment
- Factory automation where space efficiency is critical
- Any application requiring compact, reliable double-acting actuation
Compatibility & Replacements
Compatible With
- Standard NFPA-flange mounting interfaces
- Pneumatic systems operating at standard industrial pressures (typically 0–100 PSI)
- NPT-threaded directional control valves and manifold blocks
- Pneumatic flow controls and FRL units
- Industrial automation machinery requiring double-acting linear actuation
Replaces / Drop-In Replacement For
Verify compatibility with your system integrator before ordering. While Compact Air Products cylinders are often interchangeable within their inch-bore series when bore and stroke match, port configurations and mounting styles may differ. Cross-compatibility should be confirmed with application-specific documentation.
Works With
- Pneumatic directional solenoid valves (4/2, 4/3 logic)
- Flow control and speed adjustment accessories
- Magnetic sensors and proximity switches for position feedback
- Pneumatic manifold systems and integrated control blocks
- Standard pneumatic tubing and fittings (NPT threaded connections)
