Airtac PSB Single Acting Compact Cylinder PSB12X50U
The AirTAC Airtac PSB Single Acting Compact Cylinder PSB12X50U 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 PSB12X50U
The AirTAC PSB12X50U is a JIS pen-size single-acting push cylinder, meaning air entering its single M5x0.8 port extends the Ø5 mm rod while an internal spring retracts it upon exhaust. This configuration requires only one solenoid line, cutting tubing and wiring complexity. It delivers 42.9 N of net push at 0.5 MPa and 65.5 N at 0.7 MPa, with the return spring force already deducted from these usable figures.
The U suffix designates a 90-degree side air inlet for flat plumbing in confined spaces. Built with a SUS304 stainless steel barrel and rod, the slim mini body resists corrosion in damp jigs. A fixed TPU bumper at each end cushions the stroke. For practical sizing, plan for a safe working load of about 26 N (roughly 60 percent of the 0.5 MPa rating) to account for seal friction.
Airtac PSB Single Acting Compact Cylinder PSB12X50U Technical Specifications
| Model | Airtac PSB Single Acting Compact Cylinder PSB12X50U |
|---|---|
| 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 PSB12X50U
| 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 PSB12X50U Is Used
Part Ejector
Pushes machined pins off a conveyor belt; the spring-return design guarantees the ejector arm clears the belt path if compressed air drops unexpectedly.
Clamp Release
Applies 42.9 N of net thrust at 0.5 MPa to hold a light aluminum fixture, automatically releasing the part when the single solenoid valve exhausts.
Flap Folder
Extends to tuck carton flaps on a packaging line, utilizing the 90-degree side inlet to keep pneumatic plumbing flush against the machine frame.
Is the Airtac PSB Single Acting Compact Cylinder PSB12X50U the Right Cylinder?
This 12 mm bore, 50 mm stroke model sits between the Ø10 option (29.8 N net push at 0.5 MPa) and the Ø16 option (74.8 N net push at 0.5 MPa). The internal return spring establishes a 0.2 MPa minimum operating pressure before motion begins, and the rod fails safe to the retracted position on air loss. Confirm your ordering essentials: bore, stroke, the U side inlet, and mounting brackets.
Because the thin Ø5 mm piston rod is designed strictly for coaxial thrust over this 50 mm stroke, apply an external linear bearing if the application involves any off-axis loads. Without live air pressure, the spring actively holds the rod retracted rather than locking it in an arbitrary mid-position.
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 PSB12X50U FAQ
The net push force is 42.9 N at 0.5 MPa and 65.5 N at the 0.7 MPa maximum. The internal return spring sets a 0.2 MPa minimum pressure before the rod moves, and the cylinder fails safe to the retracted position on air loss.
It uses a fixed TPU bumper at each end to decelerate the stroke for the last few millimeters. Because it is not adjustable, metering out the exhaust or adding an external shock absorber is recommended when cycling at higher speeds with real tooling mass.
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Standard models usually ship in 3-4 days.
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