Airtac STA Single Acting Compact Guided Cylinder STA40X25SB
The AirTAC Airtac STA Single Acting Compact Guided Cylinder STA40X25SB is a genuine single-acting COMPACT cylinder (single acting, pull type) with a Ø40mm 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.
- BoreØ40 mm
- Stroke25 mm
- Port sizePT1/8
- Acting typeSingle acting, pull type
- Rod threadM8×1.25 (F) / M14×1.5 (B)
- CushionFixed NBR bumper
About the Airtac STA Single Acting Compact Guided Cylinder STA40X25SB
The AirTAC STA40X25SB is a compact single-acting pull-type cylinder where compressed air retracts the 16 mm rod and an internal spring pushes it back out. It yields 445.1 N of net pull at 0.5 MPa (656.2 N at 0.7 MPa), with the spring force already subtracted from the pneumatic effort. The short riveted body saves valuable axial mounting depth where a round-body unit will not fit.
This specific configuration includes a built-in piston magnet for AirTAC reed or electronic switches and a male M14x1.5 rod thread. A fixed NBR bumper decelerates the stroke end, operating effectively between 0.2 and 1.0 MPa at speeds of 50-500 mm/s.
Airtac STA Single Acting Compact Guided Cylinder STA40X25SB Technical Specifications
| Model | Airtac STA Single Acting Compact Guided Cylinder STA40X25SB |
|---|---|
| Series | STA compact single-acting cylinder |
| Bore size | Ø40 mm |
| Stroke | 25 mm |
| Acting type | Single acting, pull type |
| Port size | PT1/8 |
| Rod end thread | M8×1.25 female / M14×1.5 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 (Ø40mm, Pull)
| Pressure | Pull force (net) |
|---|---|
| 0.5 MPa | 445 N |
| 0.7 MPa | 656 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 STA40X25SB
| STA | Compact single acting, pull type cylinder series. |
|---|---|
| 40 | 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 STA40X25SB Is Used
Tension Web Material
Uses the 445.1 N net pull to draw back a tensioning roller on a film line, with the spring extending to release tension when air is removed.
Hold-Down Clamping
Pulls a clamp down to secure cartons for strapping, relying on the male M14x1.5 thread for a robust fixture and the compact body for tight machine frames.
Gate Return Mechanism
Air retracts the rod to open a diverter gate, allowing the internal spring to push it back to the closed position for fail-safe sorting operations.
Is the Airtac STA Single Acting Compact Guided Cylinder STA40X25SB the Right Cylinder?
When sizing this 40 mm bore, verify if the 445.1 N net pull at 0.5 MPa suits your tensioning load. Stepping down, the STA32 provides 290.1 N, while stepping up to the STA50 yields 717.7 N. This model features a 25 mm stroke, safely under the 30 mm single-acting ceiling.
Remember the spring drives the rod out upon air loss, so it will not hold a mid-stroke load without live pressure or an external lock. This STA40X25SB variant includes the -S magnet and -B male M14x1.5 rod thread, utilizing a PT1/8 port.
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 STA40X25SB FAQ
The STA40X25SB provides 445.1 N net pull at 0.5 MPa and 656.2 N at 0.7 MPa. It requires an operating pressure of 0.2-1.0 MPa, needing at least 0.2 MPa to overcome the internal return spring.
Air pressure retracts the rod while the internal spring extends it. The -S code denotes a built-in magnet for position sensing with AirTAC reed or electronic switches. The spring extends the rod fully on air loss, so it cannot hold a mid-stroke load without an external device.
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