Airtac STA Single Acting Compact Guided Cylinder STA40X30S
The AirTAC Airtac STA Single Acting Compact Guided Cylinder STA40X30S is a genuine single-acting COMPACT cylinder (single acting, pull type) with a Ø40mm bore and 30mm 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
- Stroke30 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 STA40X30S
The AirTAC STA40X30S 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 provides 445.1 N of net pull at 0.5 MPa, meaning the return spring force is already subtracted from the pneumatic capability. The short riveted body saves axial mounting depth where a round-body or profile cylinder will not fit.
This 40 mm bore unit operates at 50-500 mm/s and relies on a fixed NBR bumper to decelerate the stroke end, rather than an adjustable air cushion. Because it includes the S option, a built-in piston magnet enables position feedback when paired with an AirTAC reed or electronic switch.
Airtac STA Single Acting Compact Guided Cylinder STA40X30S Technical Specifications
| Model | Airtac STA Single Acting Compact Guided Cylinder STA40X30S |
|---|---|
| Series | STA compact single-acting cylinder |
| Bore size | Ø40 mm |
| Stroke | 30 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 STA40X30S
| STA | Compact single acting, pull type cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×30 | 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 STA40X30S Is Used
Tension Gate Closure
Uses the 445.1 N net pull to draw a conveyor sorting gate shut, letting the internal spring push it back open when air is released.
Carton Hold-Down
Pulls a clamping arm down to secure cartons during sealing, with the spring extending the arm up to release the package.
Vertical Lift Retract
Lifts a 22.7 kg fixture vertically using air to pull it up, relying on the spring to lower the load safely if pressure drops.
Is the Airtac STA Single Acting Compact Guided Cylinder STA40X30S the Right Cylinder?
Size this model against its neighbors: the STA32 yields 290.1 N net pull at 0.5 MPa, while the larger STA50 provides 717.7 N at the same pressure. The 445.1 N output of this 40 mm bore supports a safe working load of roughly 267 N, allowing a vertical lift of about 22.7 kg with a 2:1 margin.
This configuration has a 30 mm stroke, the maximum standard length for the series. The spring extends the rod to rest at full length on air loss, so it does not hold a mid-stroke load without live pressure. Confirm the PT1/8 port, the built-in S magnet, and the female M8x1.25 rod-end thread for your mounting setup.
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 STA40X30S FAQ
The STA40X30S provides 445.1 N of net pull at 0.5 MPa and 656.2 N at 0.7 MPa. These figures already account for the internal return spring resistance.
Air pressure retracts the rod and requires a minimum of 0.2 MPa to overcome the spring. When air is released, the spring extends the rod back out to its resting length.
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