Airtac STA Single Acting Compact Guided Cylinder STA25X15SB
The AirTAC Airtac STA Single Acting Compact Guided Cylinder STA25X15SB 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 STA25X15SB
The AirTAC STA25X15SB is a compact single-acting pull-type cylinder where compressed air retracts the rod and an internal spring pushes it back out. It yields 177.7 N of net pull at 0.5 MPa, making it ideal for tensioning and return-to-open tasks. Because the quoted force is already net of the spring, you can size directly to this value.
This unit carries the S and B options, meaning it has a built-in piston magnet for AirTAC reed or electronic switches and a male M8x1.25 threaded rod end. The short riveted body minimizes axial mounting depth, while a fixed NBR bumper absorbs end-of-stroke shock without acting as a lock.
Airtac STA Single Acting Compact Guided Cylinder STA25X15SB Technical Specifications
| Model | Airtac STA Single Acting Compact Guided Cylinder STA25X15SB |
|---|---|
| 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 STA25X15SB
| 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 STA25X15SB Is Used
Gate Return Mechanism
Uses the spring-extend function to reliably push a diverter gate back to its open position after air pressure retracts the rod to clear passing packages.
Film Tensioning Arm
Applies steady pull tension on packaging film during the wrap cycle, with the 177.7 N net pull ensuring consistent material feed without tearing.
Vertical Lift Stop
Pulls a lightweight 9.1 kg payload upward against gravity during actuation, relying on the internal spring to safely lower the item when air is removed.
Is the Airtac STA Single Acting Compact Guided Cylinder STA25X15SB the Right Cylinder?
When sizing this 25 mm bore, compare it both ways: stepping down to the STA20 yields 108.9 N net pull at 0.5 MPa, whereas stepping up to the STA32 provides 290.1 N. With a safe working load around 107 N (roughly 60 percent of the 0.5 MPa rating), this model suits vertical lifts up to 9.1 kg with a 2:1 margin.
Remember the 30 mm maximum stroke ceiling and that the spring extends the rod upon air loss, so it will not hold a mid-stroke load without external pressure. This configuration confirms a 15 mm stroke, M5x0.8 port, male M8x1.25 rod thread, and an internal magnet for solid-state or reed sensing.
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 STA25X15SB FAQ
This cylinder provides 177.7 N of net pull at 0.5 MPa and 260.1 N at 0.7 MPa. These figures already account for the internal return spring resistance, so no further subtraction is needed for your sizing calculations.
Air pressure retracts the rod, and you must supply at least 0.2 MPa to overcome the internal spring. When air is released, the spring drives the rod back out to the extended position, meaning it cannot hold a mid-stroke load without live pressure.
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