Airtac PSB Single Acting Compact Cylinder PSB12X45U
The AirTAC Airtac PSB Single Acting Compact Cylinder PSB12X45U is a single acting, push type (spring return) pen-size mini cylinder with a Ø12mm bore and 45mm 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
- Stroke45 mm
- Port sizeM5×0.8
- Acting typePush, single acting
- Rod threadM10×1.0
- ReturnSpring
About the Airtac PSB Single Acting Compact Cylinder PSB12X45U
The AirTAC PSB12X45U is a JIS pen-size single-acting push cylinder that extends via one M5x0.8 air port and retracts via an internal spring. It provides 42.9 N of net push at 0.5 MPa, simplifying valving since only one solenoid line is required. The U option designates a 90-degree side inlet for flat plumbing in confined spaces.
Built with a SUS304 stainless steel rod and barrel, this slim mini body handles damp or tight jig environments. The fail-safe design ensures the rod pulls home automatically upon air loss. A fixed TPU bumper cushions the stroke ends, and the M10x1.0 rod-end thread handles tooling attachment.
Airtac PSB Single Acting Compact Cylinder PSB12X45U Technical Specifications
| Model | Airtac PSB Single Acting Compact Cylinder PSB12X45U |
|---|---|
| Series | PSB JIS pen-size mini cylinder |
| Bore size | Ø12 mm |
| Rod diameter | Ø5 mm |
| Stroke | 45 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 PSB12X45U
| PSB | JIS pen-size single acting, push type (spring return) mini-cylinder series. |
|---|---|
| 12 | Bore size in mm. |
| ×45 | 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 PSB12X45U Is Used
Part Ejection Arm
Uses the spring-return push to eject machined components from a CNC fixture, guaranteeing the arm retracts safely when air drops.
Sorting Diverter
Employs the 90-degree side inlet to fit within a narrow conveyor frame, pushing lightweight packages onto a secondary track.
Flap Hold-down
Clamps carton flaps during a taping sequence, relying on the single air line to maintain 42.9 N of holding thrust at 0.5 MPa.
Is the Airtac PSB Single Acting Compact Cylinder PSB12X45U the Right Cylinder?
This 12mm bore generates 42.9 N net push at 0.5 MPa. Sizing down, the 10mm bore yields 29.8 N; sizing up, the 16mm bore provides 74.8 N at the same pressure. The internal spring sets a 0.2 MPa minimum operating pressure before motion begins. Plan for a safe working load of about 26 N (roughly 60 percent of the 0.5 MPa rating) to account for seal friction.
With a 45mm stroke, the slender Ø5 mm piston rod requires an external guide or linear bearing if subjected to off-axis loads. Confirm your ordering essentials: 12mm bore, 45mm stroke, U side inlet, and no magnet. The TPU bumper only decelerates the last few millimeters, so meter-out the exhaust if moving heavy tooling.
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 PSB12X45U FAQ
The net push force is 42.9 N at 0.5 MPa and 65.5 N at the 0.7 MPa maximum. Because an internal spring returns the rod, a minimum operating pressure of 0.2 MPa is required before the piston moves. The rod stays retracted if air pressure is lost.
The U suffix indicates a 90-degree side air inlet for flat plumbing. Cushioning is handled by a fixed TPU bumper at each end that decelerates the last few millimeters of travel; it is not adjustable. At high speeds with real tooling mass, meter-out the exhaust or add an external shock absorber.
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1-Year Warranty
Covers non-human-caused product damage.
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Standard models usually ship in 3-4 days.
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