Airtac PSB Single Acting Compact Cylinder PSB12X40U
The AirTAC Airtac PSB Single Acting Compact Cylinder PSB12X40U 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
- No minimum order. A single piece can be ordered.
- Ready in 3–5 business days. That is the time we take to process the order and hand it to the carrier. Transit time after that depends on the destination.
About the Airtac PSB Single Acting Compact Cylinder PSB12X40U
The AirTAC PSB12X40U is a JIS pen-size single-acting push cylinder, meaning air entering its single M5x0.8 port extends the Ø5 mm rod while an internal spring handles the retraction. Because the spring constantly opposes the air stroke, the rod stays safely retracted if air pressure drops. This fail-safe behavior makes it ideal for part ejection and clamp-release duties. It supplies 42.9 N of net push at 0.5 MPa and 65.5 N at 0.7 MPa.
The U suffix designates a 90-degree side inlet for flat plumbing in cramped spaces, while the SUS304 stainless barrel and slim body resist corrosion in damp environments. A fixed TPU bumper cushions the stroke ends. For practical sizing, plan for a safe working load of about 26 N, which accounts for friction and smooth travel. If lifting vertically, this equates to lifting roughly 2.2 kg with a sane 2:1 safety margin.
Airtac PSB Single Acting Compact Cylinder PSB12X40U Technical Specifications
| Model | Airtac PSB Single Acting Compact Cylinder PSB12X40U |
|---|---|
| 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 PSB12X40U
| 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 PSB12X40U Is Used
Stamping Ejector
Pushes finished metal blanks out of a stamping die, with the spring ensuring the pin retracts clear of the tooling on air loss.
Diverter Gate
Acts as a compact diverter on a packaging line, using the 90-degree side inlet to fit within the narrow conveyor frame profile.
Carton Stopper
Holds cardboard cartons at a labeling station, safely dropping the stopper out of the path when the air supply is cut.
Is the Airtac PSB Single Acting Compact Cylinder PSB12X40U the Right Cylinder?
This 12 mm bore generates 42.9 N net push at 0.5 MPa, sitting between the smaller Ø10 (29.8 N) and larger Ø16 (74.8 N) options. The internal return spring requires a minimum operating pressure of 0.2 MPa before the rod will move. Keep the 40 mm stroke within the 60 mm single-acting limit, and verify your ordering code includes the U side inlet, desired mounting bracket, and whether a magnet is needed (this base model ships without one). Because the Ø5 mm rod is slender, add an external guide for any off-axis loads over this 40 mm stroke.
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 PSB12X40U FAQ
The usable net push force is 42.9 N at 0.5 MPa and 65.5 N at the 0.7 MPa maximum. A minimum of 0.2 MPa is required to overcome the internal return spring and move the rod.
It uses a fixed TPU bumper at each end to decelerate the stroke over the last few millimeters. The bumper is not adjustable or a locking brake; at higher speeds with heavy tooling mass, meter-out the exhaust or add an external shock absorber.
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Genuine AirTAC parts produced by AirTAC factory.
1-Year Warranty
Covers non-human-caused product damage.
Fast Dispatch
Standard models are processed and dispatched in 3-5 business days.
Fast Reply
Most inquiries answered within 7-8 hours.
Related AirTAC PSB Pen-Size Cylinders
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