Airtac PSB Single Acting Compact Cylinder PSB12X35SR
The AirTAC Airtac PSB Single Acting Compact Cylinder PSB12X35SR is a single acting, push type (spring return) pen-size mini cylinder with a Ø12mm bore and 35mm 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
- Stroke35 mm
- Port sizeM5×0.8
- Acting typePush, single acting
- Rod threadM10×1.0
- ReturnSpring
About the Airtac PSB Single Acting Compact Cylinder PSB12X35SR
The AirTAC PSB12X35SR is a JIS pen-size single-acting push cylinder with a 12 mm bore and 35 mm stroke. Air entering the single M5x0.8 port extends the Ø5 mm rod, while an internal spring retracts it upon exhaust release. This fail-safe design ensures the rod returns home if air pressure drops, making it ideal for clamp-release and part-eject tasks. It supplies 42.9 N of net push at 0.5 MPa and 65.5 N at 0.7 MPa.
Equipped with a built-in magnet (-S), it pairs with AirTAC reed or electronic switches for position confirmation. The SUS304 stainless barrel and slim body fit easily into tight jigs. A fixed TPU bumper cushions the stroke ends, and the R axial inlet keeps plumbing inline. Plan for a safe working load of about 26 N, which accounts for seal friction and smooth travel.
Airtac PSB Single Acting Compact Cylinder PSB12X35SR Technical Specifications
| Model | Airtac PSB Single Acting Compact Cylinder PSB12X35SR |
|---|---|
| Series | PSB JIS pen-size mini cylinder |
| Bore size | Ø12 mm |
| Rod diameter | Ø5 mm |
| Stroke | 35 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 PSB12X35SR
| PSB | JIS pen-size single acting, push type (spring return) mini-cylinder series. |
|---|---|
| 12 | Bore size in mm. |
| ×35 | 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 PSB12X35SR Is Used
Stamping Ejector
Pushes finished metal blanks out of a press die. The spring-return design guarantees the ejector clears the mold when air is removed, preventing crashes on the next cycle.
Package Diverter
Acts as a spring-loaded gate arm to route small cartons on a packaging line. Fail-safe retraction keeps the lane open during an air loss event, avoiding downstream jams.
Clamp Release
Holds a workpiece against a stop during machining. Air extends the rod to clamp, and exhausting the line safely releases the part via the internal spring.
Is the Airtac PSB Single Acting Compact Cylinder PSB12X35SR the Right Cylinder?
This 12 mm bore provides 42.9 N net push at 0.5 MPa. If you need less force, the 10 mm bore offers 29.8 N; for heavier tasks, the 16 mm bore yields 74.8 N. The internal spring requires a minimum operating pressure of 0.2 MPa before the rod moves. With a 35 mm stroke, the slender Ø5 mm rod handles coaxial thrust well, but add an external guide if subjected to off-axis loads.
When ordering, confirm the 12 mm bore, 35 mm stroke, built-in magnet (S), and R axial back cover. The fixed TPU bumper decelerates the last few millimeters of travel, but at high speeds with real tooling mass, meter-out the exhaust or add an external shock absorber to prevent bottoming out.
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 PSB12X35SR FAQ
The net usable push force is 42.9 N at 0.5 MPa and 65.5 N at 0.7 MPa (maximum pressure). Because an internal spring opposes the air stroke, a minimum operating pressure of 0.2 MPa is required before the rod begins to move. The spring ensures the rod fails safe in the retracted position.
Yes, the -S suffix indicates a built-in piston magnet compatible with both AirTAC reed and electronic solid-state switches. For cushioning, Ø6-Ø16 bores use a fixed TPU bumper at each end. It decelerates the rod over the last few millimeters, but at high speeds with heavy tooling, you should meter-out the exhaust or add an external shock absorber.
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Related AirTAC PSB Pen-Size Cylinders
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