Airtac STA Single Acting Compact Guided Cylinder STA25X25
The AirTAC Airtac STA Single Acting Compact Guided Cylinder STA25X25 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 STA25X25
The AirTAC STA25X25 is a compact single-acting pull-type cylinder that uses compressed air to retract the 10 mm piston rod, while an internal spring pushes it back out. It yields a net pull of 177.7 N at 0.5 MPa and 260.1 N at 0.7 MPa, making it suitable for tensioning and return-to-open tasks. Because the quoted force is already net of the spring, you can size directly to these values.
This unit features a short riveted body that minimizes axial mounting depth where standard round-body or large-profile cylinders will not fit. It operates at 50-500 mm/s and relies on a fixed NBR bumper to decelerate the stroke end, which is not an adjustable cushion. Since this specific SKU lacks the -S magnet code, it cannot accept reed or electronic switches.
Airtac STA Single Acting Compact Guided Cylinder STA25X25 Technical Specifications
| Model | Airtac STA Single Acting Compact Guided Cylinder STA25X25 |
|---|---|
| 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 STA25X25
| 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 STA25X25 Is Used
Gate Return Mechanism
Uses the spring-extend function to reliably hold a diverter gate open, with the 177.7 N air pull retracting the rod to close the gate on demand.
Film Tensioning
Maintains steady tension on packaging film by pulling the dancer arm back against the load, utilizing the 260.1 N net pull at 0.7 MPa.
Hold-Down Release
Secures a light component during machining with the spring force, then retracts the 10 mm rod to clear the area for unloading.
Is the Airtac STA Single Acting Compact Guided Cylinder STA25X25 the Right Cylinder?
When sizing this model, compare its 177.7 N net pull at 0.5 MPa against adjacent bores: the STA20 provides 108.9 N, while the STA32 offers 290.1 N. For a 2:1 safety margin, the safe working load is approximately 107 N, translating to a vertical lift capacity of about 9.1 kg. The 25 mm stroke sits well under the 30 mm maximum ceiling for this series.
Remember that air pressure must be at least 0.2 MPa to overcome the return spring. Upon air loss, the spring drives the rod out to the extended rest position, meaning it cannot hold a mid-stroke load without an external device. Confirm your requirements for the M5x0.8 port, the female M5x0.8 rod-end thread, and the lack of a piston magnet before ordering.
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 STA25X25 FAQ
The STA25X25 provides a net pull force of 177.7 N at 0.5 MPa and 260.1 N at 0.7 MPa. These figures already account for the internal return spring, so you can size your load directly to these values.
No, this specific SKU does not include the -S option, so it lacks a piston magnet and cannot accept reed or electronic switches. You must select the STA25X25S variant if position sensing is required.
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