Overview
The PHD CRS6U 20X40-BB-M is a compact, double-acting pneumatic cylinder from PHD Inc.’s Series CRS. With a 20mm bore and 40mm stroke, this actuator delivers reliable linear motion in confined spaces. The magnetic piston accommodates PHD reed switches and proximity sensors, while dual shock pads provide cushioning at both end positions for smooth, controlled operation.
Key Features
- Double-acting pneumatic design for power in both directions
- Compact profile ideal for space-limited automation equipment
- Magnetic piston for PHD JC1 reed switch and sensor integration
- Shock pads on both ends reduce impact and wear
- Self-lubricating nitrile seals for low maintenance operation
- Field repairable construction for extended service life
- Metric ports and mounting holes for global compatibility
Technical Specifications
- Bore Diameter: 20mm
- Stroke Length: 40mm
- Action Type: Double-acting
- Rod Configuration: Single rod
- Piston Type: Magnetic (indicated by -M suffix)
- End Features: Shock pads both directions (-BB)
- Port Type: G1/8″ (metric threaded)
- Piston Seals: Nitrile, self-lubricating
- Bore Coating: Hard-coat aluminum alloy
- Operating Medium: Compressed air (lubricated or non-lubricated)
- Service Life: 70 million linear inches minimum at operating temps under 49°C
Typical Applications
- Automated packaging and labeling systems
- Precision positioning in manufacturing equipment
- Robotic gripper actuation
- Machine tool clamping and workholding
- Valve actuation and gate control
- Motion control in confined spaces where compact cylinders are required
Compatibility & Replacements
Compatible With
- PHD Series CRS compact cylinder networks and systems
- Standard pneumatic control systems using compressed air
- PHD JC1 proximity switches and reed switch sensor platforms
- Magnetoresistive and reed switch applications (magnetic piston design)
- ISO 4401 standard pneumatic valve interfaces
Replaces / Drop-In Replacement For
Verify compatibility with your system integrator before ordering. The CRS6U 20X40-BB-M may interchange with other CRS6U series cylinders of identical bore and stroke, but port configurations and mounting patterns must be confirmed against the original equipment drawing.
Works With
- PHD pneumatic control valves and manifolds
- Standard industrial air compressors and regulators
- Pneumatic directional control solenoid valves
- Flow control and pilot-operated check valves
- G1/8″ threaded pneumatic hose fittings and connectors
- Metric M6 and M8 mounting hardware












