Airtac PSB Single Acting Compact Cylinder PSB12X50SR
The AirTAC Airtac PSB Single Acting Compact Cylinder PSB12X50SR is a single acting, push type (spring return) pen-size mini cylinder with a Ø12mm bore and 50mm stroke. A single air port drives the push stroke; the built-in return spring resets the rod when air is released, so only one solenoid line is needed.
- BoreØ12 mm
- Stroke50 mm
- Port sizeM5×0.8
- Acting typePush, single acting
- Rod threadM10×1.0
- ReturnSpring
About the Airtac PSB Single Acting Compact Cylinder PSB12X50SR
The AirTAC PSB12X50SR is a JIS pen-size single-acting push cylinder with a 50 mm stroke and built-in magnet. Air entering the single M5x0.8 port extends the Ø5 mm rod, while an internal spring retracts it upon exhaust release. This fail-safe design ensures the rod returns home if air pressure drops, making it ideal for clamp-release and part-eject duties. It yields 42.9 N of net push at 0.5 MPa.
Built with a SUS304 stainless barrel and slim mini body, it fits tight jigs and light end-of-arm tooling. The -S suffix denotes a piston magnet for position sensing with reed or electronic switches. A fixed TPU bumper cushions the stroke ends. For practical sizing, plan for a safe working load of about 26 N (roughly 60 percent of the 0.5 MPa rating), which can vertically lift around 2.2 kg with a 2:1 margin.
Airtac PSB Single Acting Compact Cylinder PSB12X50SR Technical Specifications
| Model | Airtac PSB Single Acting Compact Cylinder PSB12X50SR |
|---|---|
| Series | PSB JIS pen-size mini cylinder |
| Bore size | Ø12 mm |
| Rod diameter | Ø5 mm |
| Stroke | 50 mm |
| Acting type | Single acting, push type (spring return) |
| Port size | M5×0.8 |
| Fluid | Air (filtered by 40µm element) |
|---|---|
| Operating pressure | 0.2 – 0.7 MPa |
| Proof pressure | 1.2 MPa |
| Temperature | -20 to +70 °C |
| Speed range | 50 – 800 mm/s |
| Return | Return spring (push by air) |
| Max standard stroke | Up to 60 mm |
The spring holds the rod retracted; applying air pushes the rod out, and removing air lets the spring return it. Forces below are the NET spring-deducted values from the AirTAC thrust table. Confirm against the product label before installation.
Net Push Force (Ø12mm)
| Pressure | Net push force |
|---|---|
| 0.5 MPa | 42.9 N |
| 0.7 MPa (max) | 65.5 N |
These are the usable push forces after the return spring is subtracted, taken directly from the AirTAC single-acting thrust table. Minimum operating pressure is set by the spring, so this model needs at least the lower pressure shown to move.
Model Code: Airtac PSB Single Acting Compact Cylinder PSB12X50SR
| PSB | JIS pen-size single acting, push type (spring return) mini-cylinder series. |
|---|---|
| 12 | Bore size in mm. |
| ×50 | Stroke length in mm. |
| S | Built-in magnet for magnetic-switch position sensing (omit = no magnet). |
| R / U / CB | Back cover: R axial inlet, U 90° side inlet, CB double clevis (bore-dependent). |
Mounting accessories: LB, FA, CJ. Related PB-family variants: PB (double acting), PTB (single-acting pull), PBD (double rod), PBR (front-mount).
Where the Airtac PSB Single Acting Compact Cylinder PSB12X50SR Is Used
Stamping Ejector
Pushes formed metal blanks out of a press die. The spring-return design guarantees the ejector pin clears the mold when air is removed, preventing crashes.
Package Diverter
Acts as a spring-loaded gate arm on a packaging line to sort cartons. Fail-safe retraction keeps the lane open during an air loss event to avoid jams.
Clamp Release
Holds a workpiece against a machining stop. Air extends the rod to lock the part, and exhausting the line safely releases the clamp home.
Is the Airtac PSB Single Acting Compact Cylinder PSB12X50SR the Right Cylinder?
This 12 mm bore provides 42.9 N net push at 0.5 MPa and 65.5 N at 0.7 MPa. If you need less force, the Ø10 bore offers 29.8 N at 0.5 MPa; for heavier tasks, the Ø16 bore supplies 74.8 N. The internal return spring requires a minimum 0.2 MPa operating pressure before the rod moves. Confirm your ordering essentials: 12 mm bore, 50 mm stroke, -S magnet, and R axial inlet.
Because the stroke is 50 mm and the rod is a slender Ø5 mm, add an external guide or linear bearing for off-axis loads to prevent binding. The fixed TPU bumper only decelerates the last few millimeters, so at mid-to-high speeds with real tooling mass, meter-out the exhaust or add an external shock absorber.
Quick checklist
- ✓ Net push force at your working pressure
- ✓ Only one air line / solenoid needed
- ✓ Fail-safe retract on air loss
- ✓ Magnet (S) for sensors?
- ✓ Stroke ≤ 60 mm (single-acting limit)
- ✓ Keep the load coaxial — avoid side load
Installation & Maintenance Notes
- check Use clean air filtered to 40µm or finer.
- check Keep within 0.2 – 0.7 MPa operating pressure.
- check Allow for spring force in the stroke direction.
- check Do not add an external return mechanism.
- check Keep the load coaxial; avoid side load on the thin rod.
- check Do not dismantle the front or back cover.
Airtac PSB Single Acting Compact Cylinder PSB12X50SR FAQ
The net usable push force is 42.9 N at 0.5 MPa and 65.5 N at 0.7 MPa (maximum pressure). Because an internal spring returns the rod, a minimum of 0.2 MPa is required to overcome the spring and move the piston.
The -S suffix indicates a built-in piston magnet compatible with reed or electronic switches. Cushioning is handled by a fixed TPU bumper at each end; it is not adjustable, so for heavy tooling mass at higher speeds, use meter-out flow control or an external shock absorber.
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