Airtac PSB Single Acting Compact Cylinder PSB12X25U
The AirTAC Airtac PSB Single Acting Compact Cylinder PSB12X25U is a single acting, push type (spring return) pen-size mini cylinder with a Ø12mm bore and 25mm 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
- Stroke25 mm
- Port sizeM5×0.8
- Acting typePush, single acting
- Rod threadM10×1.0
- ReturnSpring
About the Airtac PSB Single Acting Compact Cylinder PSB12X25U
The AirTAC PSB12X25U is a JIS pen-size single-acting push cylinder that extends via one M5x0.8 air port and retracts automatically via an internal spring. It supplies 42.9 N of net push force at 0.5 MPa, rising to 65.5 N at the 0.7 MPa maximum. The U suffix designates a 90-degree side inlet, keeping plumbing flat against your jig.
Built with a SUS304 stainless rod and barrel, this slim mini body fits tight spaces. A fixed TPU bumper cushions the stroke ends. Because the internal spring sets a 0.2 MPa minimum pressure before motion starts, you only need a single solenoid line to drive the action.
Airtac PSB Single Acting Compact Cylinder PSB12X25U Technical Specifications
| Model | Airtac PSB Single Acting Compact Cylinder PSB12X25U |
|---|---|
| Series | PSB JIS pen-size mini cylinder |
| Bore size | Ø12 mm |
| Rod diameter | Ø5 mm |
| Stroke | 25 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 PSB12X25U
| PSB | JIS pen-size single acting, push type (spring return) mini-cylinder series. |
|---|---|
| 12 | Bore size in mm. |
| ×25 | 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 PSB12X25U Is Used
Stamping Ejector
Pushes formed metal blanks out of a progressive die. The spring-return design guarantees the ejector pin pulls back safely if air pressure drops.
Package Diverter
Acts as a slim routing gate on a packaging line. The 90-degree side inlet keeps the actuator flush within the conveyor frame.
Clamp Release
Applies 42.9 N of holding push at 0.5 MPa for light machining fixtures, automatically unlocking when the air supply is cut.
Is the Airtac PSB Single Acting Compact Cylinder PSB12X25U the Right Cylinder?
This 12 mm bore generates 42.9 N net push at 0.5 MPa. Stepping down, the Ø10 variant offers 29.8 N; stepping up, the Ø16 provides 74.8 N. Plan for a safe working load of about 26 N (roughly 60 percent of the 0.5 MPa figure) to account for seal friction. Vertically, it lifts about 2.2 kg with a 2:1 safety margin.
The fail-safe spring holds the rod retracted upon air loss, ideal for part ejection or clamp release. The Ø5 mm rod handles coaxial thrust well, but add an external guide for off-axis loads over this 25 mm stroke. Confirm your ordering essentials: bore, stroke, U side inlet, and mounting brackets.
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 PSB12X25U FAQ
It delivers 42.9 N of net push at 0.5 MPa and 65.5 N at 0.7 MPa maximum. Because the internal return spring opposes the air stroke, a minimum of 0.2 MPa is required before the rod extends. The spring ensures the rod fails safe in the retracted position.
It uses a fixed TPU bumper at each end to decelerate the stroke over the last few millimeters. This bumper is not adjustable. At higher cycling speeds with heavy tooling mass, you should meter-out the exhaust or add an external shock absorber to prevent bottoming out.
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Genuine AirTAC parts produced by AirTAC factory.
1-Year Warranty
Covers non-human-caused product damage.
Fast Dispatch
Standard models usually ship in 3-4 days.
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Most inquiries answered within 7-8 hours.
Related AirTAC PSB Pen-Size Cylinders
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