Airtac PSB Single Acting Compact Cylinder PSB12X40R
The AirTAC Airtac PSB Single Acting Compact Cylinder PSB12X40R is a single acting, push type (spring return) pen-size mini cylinder with a Ø12mm bore and 40mm 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
- Stroke40 mm
- Port sizeM5×0.8
- Acting typePush, single acting
- Rod threadM10×1.0
- ReturnSpring
About the Airtac PSB Single Acting Compact Cylinder PSB12X40R
The AirTAC PSB12X40R is a JIS pen-size single-acting push cylinder with a 40 mm stroke. Air entering the M5x0.8 port extends the Ø5 mm rod, while an internal spring retracts it upon exhaust release. This single-line design cuts tubing complexity and ensures the rod safely springs back to a retracted home position if air pressure drops. It supplies 42.9 N of net push at 0.5 MPa.
Built with a SUS304 stainless barrel and slim body, it fits easily into tight jigs. The bore uses a fixed TPU bumper to soften impact at stroke ends. For practical sizing, plan for a safe working load of roughly 26 N (about 60 percent of the 0.5 MPa rating) to account for seal friction. This equates to lifting about 2.2 kg vertically with a sane 2:1 margin.
Airtac PSB Single Acting Compact Cylinder PSB12X40R Technical Specifications
| Model | Airtac PSB Single Acting Compact Cylinder PSB12X40R |
|---|---|
| Series | PSB JIS pen-size mini cylinder |
| Bore size | Ø12 mm |
| Rod diameter | Ø5 mm |
| Stroke | 40 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 PSB12X40R
| PSB | JIS pen-size single acting, push type (spring return) mini-cylinder series. |
|---|---|
| 12 | Bore size in mm. |
| ×40 | 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 PSB12X40R Is Used
Stamping Ejector
Pushes finished metal blanks out of a press die. The spring-return design guarantees the ejector pin clears the mold cavity when air is removed, preventing crashes on the next cycle.
Diverter Gate
Acts as a routing flap on a packaging line to sort cartons. A single solenoid valve extends the gate to divert items, while the spring failsafe pulls the flap back flush to allow straight pass-through.
Clamp Release
Holds a workpiece stationary during a light machining task. Air holds the clamp extended, and exhausting the line instantly springs the rod back to release the part rapidly for robotic unloading.
Is the Airtac PSB Single Acting Compact Cylinder PSB12X40R 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 10 mm version offers 29.8 N at 0.5 MPa; stepping up to the 16 mm bore provides 74.8 N. Remember the internal spring demands a minimum 0.2 MPa operating pressure before motion begins. The Ø5 mm rod handles coaxial thrust well, but over this 40 mm stroke or under off-axis loads, add an external linear bearing to prevent side loading.
When ordering, confirm your essentials: 12 mm bore, 40 mm stroke, no magnet, R axial inlet, and your preferred mounting bracket. The fixed TPU bumper only decelerates the last few millimeters, so at high cycling speeds with heavy tooling, meter-out the exhaust or install an external shock absorber.
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 PSB12X40R FAQ
The net usable push force is 42.9 N at 0.5 MPa and 65.5 N at the 0.7 MPa maximum. Because an internal spring provides the return stroke, a minimum operating pressure of 0.2 MPa is required to overcome the spring and extend the rod. Loss of air pressure will automatically retract the rod.
It uses a fixed TPU bumper at the stroke ends rather than an adjustable air cushion. The bumper absorbs impact over the last few millimeters of travel. If you are cycling at high speeds with significant tooling mass, you should meter-out the exhaust or add an external shock absorber to prevent bottoming out.
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Related AirTAC PSB Pen-Size Cylinders
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