Airtac STA Single Acting Compact Guided Cylinder STA40X30
The AirTAC Airtac STA Single Acting Compact Guided Cylinder STA40X30 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 STA40X30
The AirTAC STA40X30 is a compact single-acting pull-type cylinder where compressed air retracts the 16 mm rod and an internal spring extends it back out. It provides 445.1 N of net pull at 0.5 MPa and 656.2 N at 0.7 MPa, with the spring force already subtracted from the total output. Because it is normally extended at rest, it fails safely to the extended position if air pressure drops.
The short riveted body saves axial mounting depth in tight machinery where round-body or profile cylinders will not fit. It requires only a single air line and one solenoid port to operate. End-of-stroke deceleration is handled by a fixed NBR bumper, which absorbs shock but is not an adjustable air cushion or a locking mechanism.
Airtac STA Single Acting Compact Guided Cylinder STA40X30 Technical Specifications
| Model | Airtac STA Single Acting Compact Guided Cylinder STA40X30 |
|---|---|
| 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 STA40X30
| 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 STA40X30 Is Used
Tension Gate Retraction
Uses the 445.1 N net pull to draw a sorting gate closed on a conveyor line, relying on the spring to push it open when air is cut.
Carton Hold-Down Pull
Pulls a hold-down arm out of the way to release packaged goods, with the compact riveted body fitting neatly within tight packaging machine frames.
Vertical Lift Return
Lifts a 22.7 kg vertical load with a 2:1 safety margin during the retract stroke, letting the spring drive the payload back down safely.
Is the Airtac STA Single Acting Compact Guided Cylinder STA40X30 the Right Cylinder?
When sizing this 40 mm bore actuator, compare its 445.1 N net pull at 0.5 MPa against adjacent bores: the STA32 yields 290.1 N, while the STA50 provides 717.7 N. This model carries a 30 mm stroke, which is the maximum standard travel length for the STA family. A safe working load is approximately 267 N, offering a 2:1 margin for a vertical lift of about 22.7 kg.
Operation requires 0.2 to 1.0 MPa of air pressure to overcome the internal spring. Because the spring drives the rod out when air is released, this cylinder cannot hold a mid-stroke load without live pressure; use an external rod lock for holding. This specific SKU lacks the S magnet option, so it cannot accept AirTAC reed or electronic switches. The rod end features a female M8x1.25 thread, and the port is PT1/8.
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 STA40X30 FAQ
The STA40X30 generates 445.1 N of net pull at 0.5 MPa and 656.2 N at 0.7 MPa. It requires an operating pressure between 0.2 and 1.0 MPa, as at least 0.2 MPa is needed to overcome the internal return spring.
No, this specific SKU does not include the S option for a built-in piston magnet, so it cannot accept AirTAC reed or electronic switches. You would need the -S variant to utilize the body sensor grooves for position detection.
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