Airtac STA Single Acting Compact Guided Cylinder STA12X25SB
The AirTAC Airtac STA Single Acting Compact Guided Cylinder STA12X25SB is a genuine single-acting COMPACT cylinder (single acting, pull type) with a Ø12mm 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.
- BoreØ12 mm
- Stroke25 mm
- Port sizeM5×0.8
- Acting typeSingle acting, pull type
- Rod threadM3×0.5 (F) / M5×0.8 (B)
- CushionFixed NBR bumper
About the Airtac STA Single Acting Compact Guided Cylinder STA12X25SB
The AirTAC STA12X25SB is a compact single-acting pull-type cylinder where air retracts the rod and an internal spring extends it. It provides 32.4 N of net pull at 0.5 MPa and 49.4 N at 0.7 MPa. The short riveted body saves axial mounting depth where a longer profile cylinder will not fit.
This configuration includes a built-in piston magnet for AirTAC reed or electronic switches and a male M5x0.8 piston rod thread. A fixed NBR bumper decelerates the stroke end. The safe working load is approximately 19 N, allowing a vertical lift of about 1.7 kg with a 2:1 margin.
Airtac STA Single Acting Compact Guided Cylinder STA12X25SB Technical Specifications
| Model | Airtac STA Single Acting Compact Guided Cylinder STA12X25SB |
|---|---|
| Series | STA compact single-acting cylinder |
| Bore size | Ø12 mm |
| Stroke | 25 mm |
| Acting type | Single acting, pull type |
| Port size | M5×0.8 |
| Rod end thread | M3×0.5 female / M5×0.8 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 (Ø12mm, Pull)
| Pressure | Pull force (net) |
|---|---|
| 0.5 MPa | 32 N |
| 0.7 MPa | 49 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 STA12X25SB
| STA | Compact single acting, pull type cylinder series. |
|---|---|
| 12 | 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 STA12X25SB Is Used
Tension Return Mechanism
Pulls a lightweight tension cable or linkage in with 32.4 N net force, letting the spring push it back out to the open rest position.
Gate Close Actuator
Uses the spring-extend function to keep a diverter gate normally open, retracting it only when 0.5 MPa air pressure is applied.
Package Hold-Down
Draws a small 1.7 kg hold-down arm out of the way on command, relying on the internal spring to safely return it.
Is the Airtac STA Single Acting Compact Guided Cylinder STA12X25SB the Right Cylinder?
When sizing this 12 mm bore, sizing both ways shows the next size up is the STA16 at 66.4 N net pull at 0.5 MPa, while the 12 mm sits at the bottom edge of the range. The 25 mm stroke is within the 30 mm maximum standard limit. Because the spring extends the rod on air loss, the STA12X25SB does not hold a mid-stroke load without live pressure.
Confirm the M5x0.8 air port, the male M5x0.8 rod thread, and the built-in magnet for switch sensing. Operating pressure must be 0.2-1.0 MPa to overcome the return spring.
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 STA12X25SB FAQ
The net pull force is 32.4 N at 0.5 MPa and 49.4 N at 0.7 MPa. This figure is already net of the return spring; air retracts the rod and the spring extends it.
No. On air loss the spring drives the rod to its extended rest position. It requires at least 0.2 MPa to overcome the spring and does not lock or hold a mid-stroke load without live pressure.
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