Airtac PSB Single Acting Compact Cylinder PSB12X20R
The AirTAC Airtac PSB Single Acting Compact Cylinder PSB12X20R 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 PSB12X20R
The AirTAC PSB12X20R is a JIS pen-size single-acting push cylinder with a 20 mm stroke. Air entering the single M5x0.8 port extends the Ø5 mm rod, while an internal spring retracts it upon exhaust release. This design requires only one solenoid line, cutting tubing and wiring complexity. It delivers 42.9 N of net push at 0.5 MPa, with the return spring force already subtracted.
Built with a SUS304 stainless barrel and slim body, it fits tight jigs and damp environments. A fixed TPU bumper at each end decelerates the stroke. If air pressure drops, the spring pulls the rod safely back to its home position. Plan for a safe working load of about 26 N, which accounts for seal friction and smooth travel.
Airtac PSB Single Acting Compact Cylinder PSB12X20R Technical Specifications
| Model | Airtac PSB Single Acting Compact Cylinder PSB12X20R |
|---|---|
| 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 PSB12X20R
| 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 PSB12X20R Is Used
Part Ejection
Pushes finished metal stampings out of a press die. The spring-return design guarantees the ejector clears the mold when air is shut off.
Gate Diverter
Acts as a compact sorting gate on a packaging line. Its slim profile mounts between tight belt rollers to deflect small cartons.
Clamp Release
Applies 42.9 N of holding push for light woodworking jigs. The fail-safe retract releases the workpiece instantly if compressed air is lost.
Is the Airtac PSB Single Acting Compact Cylinder PSB12X20R the Right Cylinder?
This 12 mm bore provides 42.9 N net push at 0.5 MPa and 65.5 N at the 0.7 MPa maximum. Stepping down to a 10 mm bore yields 29.8 N, while a 16 mm bore offers 74.8 N at the same 0.5 MPa baseline. The internal spring sets a 0.2 MPa minimum pressure before motion begins, and ensures the rod stays retracted if air fails. The R suffix specifies an axial inline air inlet.
When ordering, confirm the 20 mm stroke, bore size, and lack of a magnetic sensor. The Ø5 mm rod handles coaxial thrust well, but over long strokes or off-axis loads you should add an external linear bearing to prevent side-load damage. For heavier tooling mass, meter-out the exhaust because the fixed TPU bumper only absorbs the final few millimeters.
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 PSB12X20R FAQ
It provides 42.9 N of net push at 0.5 MPa and 65.5 N at 0.7 MPa. Because an internal spring returns the rod, a minimum of 0.2 MPa is required to overcome the spring before the rod extends. The spring ensures the rod fails safe in the retracted position.
No. This specific model lacks a magnetic piston for switches. It uses a fixed TPU bumper at each end to decelerate the stroke, which is not adjustable. At high speeds with heavy tooling, you should meter-out the exhaust or add an external shock absorber.
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