Airtac PSB Single Acting Compact Cylinder PSB12X20SU
The AirTAC Airtac PSB Single Acting Compact Cylinder PSB12X20SU is a single acting, push type (spring return) pen-size mini cylinder with a Ø12mm bore and 20mm 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
- Stroke20 mm
- Port sizeM5×0.8
- Acting typePush, single acting
- Rod threadM10×1.0
- ReturnSpring
About the Airtac PSB Single Acting Compact Cylinder PSB12X20SU
The AirTAC PSB12X20SU 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, requiring only a single solenoid line for simplified tubing and lower wiring costs. The fail-safe design ensures the rod pulls home on air loss, making it highly reliable for clamp-release operations.
Built with a SUS304 stainless barrel and a slim Ø5 mm rod, this compact unit fits tight, damp jigs. The U variant features a 90-degree side inlet for flat plumbing, and the built-in S magnet supports reed or electronic switches. A fixed TPU bumper decelerates the stroke ends, though you should meter-out the exhaust if moving heavy tooling mass at higher speeds.
Airtac PSB Single Acting Compact Cylinder PSB12X20SU Technical Specifications
| Model | Airtac PSB Single Acting Compact Cylinder PSB12X20SU |
|---|---|
| Series | PSB JIS pen-size mini cylinder |
| Bore size | Ø12 mm |
| Rod diameter | Ø5 mm |
| Stroke | 20 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 PSB12X20SU
| PSB | JIS pen-size single acting, push type (spring return) mini-cylinder series. |
|---|---|
| 12 | Bore size in mm. |
| ×20 | 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 PSB12X20SU Is Used
Part Ejection Arm
Pushes machined aluminum parts off a lathe chuck; the spring-return guarantees the ejector clears the workspace if compressed air drops suddenly.
Diverter Gate
Extends to route small plastic bottles on a packaging line, using the 90-degree side inlet to keep plumbing flush against the conveyor frame.
Clamp Release
Applies 42.9 N of net push at 0.5 MPa to hold a thin fiberglass panel for gluing, safely retracting the clamp when air is exhausted.
Is the Airtac PSB Single Acting Compact Cylinder PSB12X20SU the Right Cylinder?
This 12 mm bore yields 42.9 N net push at 0.5 MPa and 65.5 N at the 0.7 MPa maximum. If you need less force, the Ø10 bore provides 29.8 N at 0.5 MPa; for heavier tasks, the Ø16 bore offers 74.8 N. Plan for a safe working load of roughly 26 N (about 60 percent of the 0.5 MPa figure) to account for seal friction. The internal spring sets a 0.2 MPa minimum pressure before motion begins, and it holds the rod retracted safely during air loss.
When ordering, confirm the 20 mm stroke, the S magnet for position sensing, the U 90-degree side inlet, and your mounting bracket. The slender Ø5 mm rod handles coaxial thrust well, but add an external linear bearing if your application involves off-axis loads or requires lateral stability.
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 PSB12X20SU FAQ
It delivers 42.9 N of net push at 0.5 MPa and 65.5 N at 0.7 MPa. Because the internal return spring opposes the air stroke, a minimum pressure of 0.2 MPa is required before the rod extends. The spring also ensures the rod fails safe in the retracted position upon air loss.
It uses a fixed TPU bumper at each end to decelerate the last few millimeters of travel, which is not adjustable. If operating at high speeds with real tooling mass, meter-out the exhaust or add an external shock absorber. The built-in S magnet works with AirTAC reed or electronic switches for precise position sensing.
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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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