Airtac STA Single Acting Compact Guided Cylinder STA40X30SB
The AirTAC Airtac STA Single Acting Compact Guided Cylinder STA40X30SB 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 STA40X30SB
The AirTAC STA40X30SB is a compact single-acting pull-type cylinder. Air pressure retracts the 16 mm rod, while an internal spring extends it back out, leaving the unit normally extended at rest. It generates 445.1 N of net pull at 0.5 MPa, meaning the spring force is already subtracted from the pneumatic effort. This makes it ideal for tensioning or pulling loads rather than pushing them.
Featuring a short riveted body, this actuator saves axial mounting depth where a round-body cylinder will not fit. The -S code denotes a built-in piston magnet for AirTAC reed or electronic switches, and the -B code specifies a male M14x1.5 piston rod thread. A fixed NBR bumper decelerates the stroke end, operating effectively between 50 and 500 mm/s.
Airtac STA Single Acting Compact Guided Cylinder STA40X30SB Technical Specifications
| Model | Airtac STA Single Acting Compact Guided Cylinder STA40X30SB |
|---|---|
| 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 STA40X30SB
| 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 STA40X30SB Is Used
Tension Gate Retraction
Uses the 445.1 N net pull to draw a diverter gate back on a conveyor line, relying on the internal spring to safely open the passage when air is cut.
Film Roll Hold-Down
Pulls a packaging film tensioning arm inward during the wrap cycle, with the male M14x1.5 rod threading directly into the tensioner bracket.
Clamp Return Mechanism
Retracts a holding clamp to release finished parts on an assembly line, utilizing the 30 mm stroke to clear the workspace before the next cycle.
Is the Airtac STA Single Acting Compact Guided Cylinder STA40X30SB the Right Cylinder?
When sizing this 40 mm bore actuator, compare its 445.1 N net pull at 0.5 MPa against adjacent bores. Stepping down, the STA32 provides 290.1 N; stepping up, the STA50 yields 717.7 N. A safe working load is roughly 267 N, allowing a vertical lift of about 22.7 kg with a 2:1 margin. The 30 mm stroke represents the maximum standard length for this series.
Remember the spring-extend behavior: on air loss, the rod drives to its extended rest position and will not hold a mid-stroke load. To hold a load without live pressure, use a double-acting SDA with an external rod lock. This configuration confirms a 40 mm bore, 30 mm stroke, PT1/8 port, built-in magnet, and male M14x1.5 rod thread.
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 STA40X30SB FAQ
This single-acting pull-type cylinder provides a net pull of 445.1 N 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 retracts the rod, while the internal spring extends it out; on air loss, it fails to the extended position and cannot hold a mid-stroke load. The -S code adds a piston magnet compatible with AirTAC reed or electronic switches for position sensing.
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