Overview
The Bimba FO-311.5-4RM is a double-acting, single-end rod pneumatic cylinder engineered for precision and durability in industrial automation systems. Part of the Flat-1 compact series, this cylinder combines a 2″ bore with a 1.5″ stroke to deliver efficient actuation for a wide range of motion-control applications. Its robust stainless steel construction and low-friction seals ensure consistent performance across manufacturing, assembly, and packaging operations.
Key Features
- Double-acting design: Full extension and retraction through pneumatic pressure, offering bidirectional control
- Compact Flat-1 series: Space-saving footprint ideal for tight machine layouts
- Hard chrome-plated rod: Stainless steel 303 rod resists corrosion and wear, extending service life
- Stainless steel 304 body: Corrosion-resistant construction for washdown and chemical environments
- Buna-N seals: Low-friction seals reduce drag and energy consumption
- Threaded rod connection: 1/2-20 UNF-2A male thread for direct assembly to load fixtures
- Standard counterbored mounting: Both ends feature counterbored holes for flush mounting
Technical Specifications
- Bore diameter: 2 inches
- Stroke length: 1.5 inches
- Maximum operating pressure: 200 psi
- Port configuration: 2 × 1/8″ NPT threaded pneumatic ports (blind)
- Rod thread: 1/2-20 UNF-2A male (fine thread)
- Rod material: Hard chrome-plated stainless steel 303
- Cylinder body material: Stainless steel 304
- Seal material: Buna-N
- Mounting style: Standard counterbored mounting holes (both ends)
- Series: Flat-1 compact series
- Function type: Double-acting, single-end rod
Typical Applications
The FO-311.5-4RM excels in demanding industrial environments including:
- Automated assembly line fixtures and clamp mechanisms
- Food and beverage processing equipment
- Packaging machinery and material handling systems
- CNC machine tool work-holding and indexing
- Pneumatic press and molding machine actuators
- Washdown areas and wet environments (stainless construction)
- OEM equipment requiring compact, high-force actuation
Compatibility & Replacements
Compatible With
- Standard compressed air systems rated 200 psi maximum
- ISO 4401 SAE solenoid valve manifolds with 1/8″ NPT ports
- Pneumatic control valves and FRL (filter-regulator-lubricator) units
- Automated manufacturing control systems and PLC-based automation
- Standard industrial pneumatic hose and fittings (NPT-threaded)
Replaces / Drop-In Replacement For
- FO-311.5 (base model with female rod thread)
- FO-311.5-4RL (female rod variant; requires rod adapter for direct swap)
- Other compact 2″ bore × 1.5″ stroke double-acting cylinders with equivalent mounting
Works With
- Compressed air supply systems (clean, dry air; ISO 4406 cleanliness 17/15/12 recommended)
- Standard pneumatic solenoid valve interfaces (24 VDC, 120 VAC control)
- Modular pneumatic valve stacks and cavity blocks
- Flow-control and proportional valve systems for speed regulation
- Proximity sensors and magnetic reed switches for position feedback
