Overview
The Bimba FO-311.25-3RM is a double-acting, single-end rod pneumatic cylinder from the industry-standard Flat-1 series. With a 2-inch bore and 1.25-inch stroke, this compact actuator delivers reliable linear motion for industrial automation, material handling, and process control applications. The unit features threaded mounting holes at the rear end cap and a standard 1/2-20 UNF-2B female threaded rod for flexible system integration.
Key Features
- Double-acting, single-end rod design for push-pull motion control
- Compact Flat-1 series footprint suitable for space-constrained installations
- Threaded rear mounting holes for secure, rigid attachment
- Hard chrome-plated stainless steel 303 rod with stainless steel 304 body
- Buna-N seals rated for standard pneumatic operating pressures
- Two 1/8″ NPT threaded pneumatic ports for inlet/exhaust control
- Magnetic piston option available for proximity switch compatibility
Technical Specifications
Detailed specifications for precise system design and replacement planning:
- Bore Diameter: 2 inches
- Stroke Length: 1.25 inches (1-1/4″)
- Rod Diameter: 1/2-20 UNF-2B (female threaded)
- Mounting Style: Threaded holes, rear end cap
- Port Size: 1/8″ NPT (2 ports)
- Rod Material: Hard chrome-plated stainless steel 303
- Body Material: Stainless steel 304
- Seal Type: Buna-N elastomer
- Magnetic Piston: Yes (M designation)
- Weight: Approximately 1.05 lbs
- Series: Flat-1 compact pneumatic cylinder
Typical Applications
- Automated assembly line clamping and workpiece positioning
- Material handling and part transfer systems
- Pneumatic press and stamping operations
- Control valve actuation and switching applications
- Sensor-triggered automation in manufacturing and packaging
- Pneumatic logic circuits and motion control sequences
Compatibility & Replacements
Compatible With
- Standard pneumatic supply systems (typically 80–100 PSI operating range)
- ISO 4401-05 NG10 pneumatic valve interfaces
- Proximity switches and magnetic sensors (magnetic piston option)
- Modular pneumatic control platforms from Festo, Parker, SMC, and Bosch Rexroth
- PLC and motion controller systems with pneumatic interface modules
Replaces / Drop-In Replacement For
- Bimba FO-311 (1-inch stroke variant; verify mounting compatibility)
- Other Flat-1 series cylinders with 2″ bore and 1.25″ stroke from Bimba legacy inventories
- Verify compatibility with your system integrator before ordering; rod thread and mounting hole patterns must match existing installations.
Works With
- Pneumatic proportional and directional control valves (4/3, 4/2 solenoid and pilot-operated designs)
- Magnetic proximity switches for piston position feedback (1/8″ NPT mounting options)
- Industrial PLC systems via pneumatic I/O modules and relay logic circuits
- Air preparation units (regulators, filters, lubricators) with 1/8″ NPT port compatibility
- Modular manifold blocks and sandwich valve configurations
