Airtac PSB Single Acting Compact Cylinder PSB12X45SR
The AirTAC Airtac PSB Single Acting Compact Cylinder PSB12X45SR is a single acting, push type (spring return) pen-size mini cylinder with a Ø12mm bore and 45mm 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
- Stroke45 mm
- Port sizeM5×0.8
- Acting typePush, single acting
- Rod threadM10×1.0
- ReturnSpring
About the Airtac PSB Single Acting Compact Cylinder PSB12X45SR
The AirTAC PSB12X45SR is a JIS pen-size single-acting push cylinder with a 12mm bore and 45mm stroke. Air entering the single M5x0.8 port extends the Ø5mm rod, while an internal spring retracts it upon exhaust release. This design requires only one solenoid line, cutting tubing and wiring complexity. The slim SUS304 stainless body fits tight jigs, and the fail-safe spring ensures the rod pulls home if air pressure drops.
It provides 42.9 N of net push at 0.5 MPa and 65.5 N at 0.7 MPa, with the return spring force already subtracted. A fixed TPU bumper cushions the stroke ends. The built-in magnet (-S) allows tracking with reed or electronic switches. Plan for a safe working load of about 26 N (roughly 60% of the 0.5 MPa rating) to account for friction, and use an external guide for off-axis loads.
Airtac PSB Single Acting Compact Cylinder PSB12X45SR Technical Specifications
| Model | Airtac PSB Single Acting Compact Cylinder PSB12X45SR |
|---|---|
| Series | PSB JIS pen-size mini cylinder |
| Bore size | Ø12 mm |
| Rod diameter | Ø5 mm |
| Stroke | 45 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 PSB12X45SR
| PSB | JIS pen-size single acting, push type (spring return) mini-cylinder series. |
|---|---|
| 12 | Bore size in mm. |
| ×45 | 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 PSB12X45SR Is Used
Part Ejection
Pushes machined aluminum parts out of a CNC fixture; the spring safely retracts the plunger away from the workspace when air is removed.
Sorting Gate
Actuates a lightweight diverter arm on a packaging line to route small cartons, relying on the single air line for simple valve control.
Clamp Release
Applies 26 N of holding force to secure a film roll during sealing, then instantly releases the clamp via spring return on exhaust.
Is the Airtac PSB Single Acting Compact Cylinder PSB12X45SR the Right Cylinder?
This 12mm bore yields 42.9 N net push at 0.5 MPa. Stepping down to a 10mm bore drops the output to 29.8 N, while a 16mm bore raises it to 74.8 N. The internal spring sets a 0.2 MPa minimum pressure before motion begins, and holds the rod retracted safely during air loss. With a 45mm stroke, the slender Ø5mm rod needs an external linear bearing to resist side loading.
Confirm your ordering essentials: 12mm bore, 45mm stroke, built-in magnet (-S), and the R axial inlet back cover. The rod-end thread is M10x1.0. Max operating pressure is 0.7 MPa.
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 PSB12X45SR 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 of 0.2 MPa is required before the rod extends. The spring automatically retracts the rod if air loss occurs.
No, it uses a fixed TPU bumper at each end to decelerate the last few millimeters of travel. At mid-to-high speeds with heavy tooling mass, the bumper can bottom out, so you should meter-out the exhaust or add an external shock absorber. The built-in magnet works with reed or electronic switches.
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Related AirTAC PSB Pen-Size Cylinders
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