Airtac STA Single Acting Compact Guided Cylinder STA25X15S
The AirTAC Airtac STA Single Acting Compact Guided Cylinder STA25X15S is a genuine single-acting COMPACT cylinder (single acting, pull type) with a Ø25mm bore and 15mm 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
- Stroke15 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 STA25X15S
The AirTAC STA25X15S is a compact single-acting pull-type cylinder where air retracts the rod and an internal spring extends it back out. It yields 177.7 N of net pull at 0.5 MPa, safely handling a working load of roughly 107 N or vertically lifting about 9.1 kg with a 2:1 margin.
This unit features a built-in piston magnet for position sensing via AirTAC reed or electronic switches. Its short riveted body saves axial mounting depth, while a fixed NBR bumper decelerates the stroke ends without acting as a lock.
Airtac STA Single Acting Compact Guided Cylinder STA25X15S Technical Specifications
| Model | Airtac STA Single Acting Compact Guided Cylinder STA25X15S |
|---|---|
| Series | STA compact single-acting cylinder |
| Bore size | Ø25 mm |
| Stroke | 15 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 STA25X15S
| STA | Compact single acting, pull type cylinder series. |
|---|---|
| 25 | Bore size in mm. |
| ×15 | 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 STA25X15S Is Used
Gate Return Mechanism
Uses the spring-extend function to automatically open a diverter gate when air pressure is released, pulling it closed via 177.7 N of net force during operation.
Film Tensioning
Maintains steady tension on packaging web material by pulling the idler roller back against the material path under 0.5 MPa of pneumatic pressure.
Vertical Lift Hold-Down
Pulls a light 9.1 kg fixture securely out of the way against gravity, relying on the internal spring to safely lower the fixture if compressed air fails.
Is the Airtac STA Single Acting Compact Guided Cylinder STA25X15S the Right Cylinder?
When sizing this 25 mm bore, verify if the adjacent options fit your pull requirements: the STA20 provides 108.9 N at 0.5 MPa, whereas the STA32 offers 290.1 N. This STA25X15S has a 15 mm stroke, safely under the 30 mm single-acting ceiling.
Confirm the M5x0.8 port, the included magnet, and the female M5x0.8 rod thread. Remember that the spring drives the rod out upon air loss, so it cannot hold a mid-stroke load without an external device.
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 STA25X15S FAQ
The STA25X15S 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 resistance.
Air pressure retracts the rod, and you need at least 0.2 MPa to overcome the spring. When air is released, the internal spring pushes the rod back out to the extended position.
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