Airtac PSB Single Acting Compact Cylinder PSB12X50SU
The AirTAC Airtac PSB Single Acting Compact Cylinder PSB12X50SU is a single acting, push type (spring return) pen-size mini cylinder with a Ø12mm bore and 50mm 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
- Stroke50 mm
- Port sizeM5×0.8
- Acting typePush, single acting
- Rod threadM10×1.0
- ReturnSpring
About the Airtac PSB Single Acting Compact Cylinder PSB12X50SU
The AirTAC PSB12X50SU is a JIS pen-size single-acting push cylinder, meaning air entering one M5x0.8 port extends the rod while an internal spring retracts it. This fail-safe design ensures the rod returns 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 spring force already deducted.
Featuring a slim SUS304 stainless body, the unit fits tight jigs easily. The U suffix indicates a 90-degree side inlet for flat plumbing. Because the return spring sets a minimum 0.2 MPa operating pressure, the rod stays retracted until sufficient air arrives. Plan for a safe working load of about 26 N (roughly 60 percent of the 0.5 MPa rating) to account for friction.
Airtac PSB Single Acting Compact Cylinder PSB12X50SU Technical Specifications
| Model | Airtac PSB Single Acting Compact Cylinder PSB12X50SU |
|---|---|
| Series | PSB JIS pen-size mini cylinder |
| Bore size | Ø12 mm |
| Rod diameter | Ø5 mm |
| Stroke | 50 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 PSB12X50SU
| PSB | JIS pen-size single acting, push type (spring return) mini-cylinder series. |
|---|---|
| 12 | Bore size in mm. |
| ×50 | 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 PSB12X50SU Is Used
Stamping Ejector
Pushes finished metal blanks out of a press die. The spring-return design guarantees the ejector pin clears the mold when air is removed.
Diverter Gate
Actuates a lightweight routing flap on a packaging line. The 90-degree side inlet keeps plumbing flush against the conveyor frame.
Carton Clamp
Applies 26 N of safe holding force to secure small cardboard boxes during labeling. The fail-safe retract releases the box if air fails.
Is the Airtac PSB Single Acting Compact Cylinder PSB12X50SU the Right Cylinder?
This 12mm bore generates 42.9 N net push at 0.5 MPa. Stepping down to a 10mm bore yields 29.8 N, while moving up to a 16mm bore provides 74.8 N. The 50mm stroke is well within the 60mm single-acting limit. Remember the spring requires at least 0.2 MPa to move. For vertical lifts, expect to raise about 2.2 kg safely with a 2:1 margin.
The thin Ø5 mm piston rod handles coaxial thrust well, but over this 50mm stroke add an external guide for any off-axis loads. Confirm your ordering essentials: 12mm bore, 50mm stroke, S magnet for position sensing, U side inlet, and your mounting bracket.
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 PSB12X50SU FAQ
The net push force is 42.9 N at 0.5 MPa and 65.5 N at 0.7 MPa (maximum pressure). Because an internal spring returns the rod, a minimum of 0.2 MPa is required to overcome the spring before the rod extends.
It uses a fixed TPU bumper to decelerate the rod over the last few millimeters. At high speeds with heavy tooling, meter-out the exhaust or add an external shock absorber. The S suffix denotes a built-in magnet for AirTAC reed or electronic switches.
Authorized Export Seller
Genuine AirTAC parts produced by AirTAC factory.
1-Year Warranty
Covers non-human-caused product damage.
Fast Dispatch
Standard models usually ship in 3-4 days.
Fast Reply
Most inquiries answered within 7-8 hours.
Related AirTAC PSB Pen-Size Cylinders
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