Airtac STA Single Acting Compact Guided Cylinder STA25X25S
The AirTAC Airtac STA Single Acting Compact Guided Cylinder STA25X25S is a genuine single-acting COMPACT cylinder (single acting, pull type) with a Ø25mm bore and 25mm stroke. Air pulles the rod and an internal spring returns it, so one solenoid line drives the motion — ideal for short-stroke clamping and ejection in tight spaces.
- BoreØ25 mm
- Stroke25 mm
- Port sizeM5×0.8
- Acting typeSingle acting, pull type
- Rod threadM5×0.8 (F) / M8×1.25 (B)
- CushionFixed NBR bumper
About the Airtac STA Single Acting Compact Guided Cylinder STA25X25S
The AirTAC STA25X25S is a compact single-acting pull-type cylinder. Air pressure retracts the 10mm rod, while an internal spring extends it out. It yields 177.7 N of net pull at 0.5 MPa, making it perfect for pulling or tensioning loads.
This thin riveted body saves axial mounting depth where larger profile cylinders fail. It includes a built-in piston magnet for position sensing and uses a fixed NBR bumper to absorb end-of-stroke shock. Operating pressure spans 0.2 to 1.0 MPa.
Airtac STA Single Acting Compact Guided Cylinder STA25X25S Technical Specifications
| Model | Airtac STA Single Acting Compact Guided Cylinder STA25X25S |
|---|---|
| Series | STA compact single-acting cylinder |
| Bore size | Ø25 mm |
| Stroke | 25 mm |
| Acting type | Single acting, pull type |
| Port size | M5×0.8 |
| Rod end thread | M5×0.8 female / M8×1.25 male (B) |
| Fluid | Air (filtered by 40µm element) |
|---|---|
| Operating pressure | 0.2 – 1.0 MPa |
| Proof pressure | 1.5 MPa |
| Temperature | -20 to +70 °C |
| Speed range | 50 – 500 mm/s |
| Cushion | Fixed NBR bumper |
| Max standard stroke | Up to 30 mm |
Specifications follow the official AirTAC SDA-family datasheet. Single-acting types start at 0.2 MPa (the spring must be overcome). Confirm against the product label before installation.
Net Output Force (Ø25mm, Pull)
| Pressure | Pull force (net) |
|---|---|
| 0.5 MPa | 178 N |
| 0.7 MPa | 260 N |
These are NET output forces — the return-spring force is already deducted. Single-acting pull only; the spring performs the opposite stroke. Size with a safety margin.
Model Code: Airtac STA Single Acting Compact Guided Cylinder STA25X25S
| STA | Compact single acting, pull type cylinder series. |
|---|---|
| 25 | Bore size in mm. |
| ×25 | Stroke length in mm (single-acting max 30 mm). |
| S | Built-in magnet for magnetic-switch sensing (omit = none). |
| B | Male-thread piston rod (omit = female thread). |
Thread: PT standard. SSA pushes out / spring returns; STA pulls in / spring extends. Related: SDA (double acting), SDAD (double rod), SDAJ (adjustable stroke).
Where the Airtac STA Single Acting Compact Guided Cylinder STA25X25S Is Used
Film Web Tensioning
Uses the 177.7 N net pull to maintain steady tension on packaging film webs during continuous feed operations.
Pallet Gate Return
Spring-extends to push a diverter gate back to its open rest position after air retracts the rod to clear passing pallets.
Carton Flap Hold-Down
Pulls a mechanical flap hold-down arm out of the way during box erection, then relies on the spring to snap it back firmly.
Is the Airtac STA Single Acting Compact Guided Cylinder STA25X25S the Right Cylinder?
When sizing this 25mm bore, compare it to its neighbors. Dropping to an STA20 reduces net pull to 108.9 N at 0.5 MPa, while stepping up to an STA32 increases it to 290.1 N. A safe working load is roughly 107 N, allowing a vertical lift of about 9.1 kg with a 2:1 margin.
This 25mm stroke model stays under the 30mm ceiling. Because the spring drives the rod out upon air loss, it cannot hold a mid-stroke load without external devices. Confirm your bore, stroke, M5x0.8 port, female M5x0.8 rod thread, and the -S magnet for reed or electronic switches.
Quick checklist
- ✓ Net pull force at your working pressure
- ✓ Stroke ≤ 30 mm (single-acting limit)
- ✓ Single air line saves a valve/port
- ✓ Magnet (S) for sensors?
- ✓ Female (blank) or male (B) rod thread
Installation & Maintenance Notes
- check Use clean air filtered to 40µm or finer.
- check Keep within 0.2 – 1.0 MPa operating pressure.
- check Remember the spring performs the return stroke.
- check Avoid side load on the short piston rod.
- check Front/rear covers are riveted — do not dismantle.
- check Installation by qualified personnel per AirTAC docs.
Airtac STA Single Acting Compact Guided Cylinder STA25X25S FAQ
This cylinder provides 177.7 N of net pull at 0.5 MPa and 260.1 N at 0.7 MPa. These values already account for the internal return spring resistance.
Air pressure retracts the rod, requiring at least 0.2 MPa to overcome the spring. When air is released, the internal spring automatically extends the rod back out.
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Related AirTAC STA Cylinders
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