Airtac STA Single Acting Compact Guided Cylinder STA20X30S
The AirTAC Airtac STA Single Acting Compact Guided Cylinder STA20X30S is a genuine single-acting COMPACT cylinder (single acting, pull type) with a Ø20mm 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.
- BoreØ20 mm
- Stroke30 mm
- Port sizeM5×0.8
- Acting typeSingle acting, pull type
- Rod threadM4×0.7 (F) / M6×1.0 (B)
- CushionFixed NBR bumper
About the Airtac STA Single Acting Compact Guided Cylinder STA20X30S
The AirTAC STA20X30S is a compact single-acting pull-type cylinder where air retracts the rod and an internal spring extends it. It yields 108.9 N of net pull at 0.5 MPa and 161.7 N at 0.7 MPa. The short riveted body saves axial mounting depth where standard round-body or larger profile cylinders will not fit.
This 20 mm bore unit features an 8 mm rod, an M5x0.8 air port, and a female M4x0.7 rod-end thread. It includes the -S option for a built-in piston magnet, supporting AirTAC reed or electronic switches for position sensing. A fixed NBR bumper decelerates the stroke end, operating effectively between 50 and 500 mm/s.
Airtac STA Single Acting Compact Guided Cylinder STA20X30S Technical Specifications
| Model | Airtac STA Single Acting Compact Guided Cylinder STA20X30S |
|---|---|
| Series | STA compact single-acting cylinder |
| Bore size | Ø20 mm |
| Stroke | 30 mm |
| Acting type | Single acting, pull type |
| Port size | M5×0.8 |
| Rod end thread | M4×0.7 female / M6×1.0 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 (Ø20mm, Pull)
| Pressure | Pull force (net) |
|---|---|
| 0.5 MPa | 109 N |
| 0.7 MPa | 162 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 STA20X30S
| STA | Compact single acting, pull type cylinder series. |
|---|---|
| 20 | 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 STA20X30S Is Used
Tension Return Pulldown
Uses the 108.9 N net pull to draw a tensioning jig inward, letting the spring automatically release the strap when air pressure drops.
Pneumatic Gate Closer
Closes a diverting gate on a packaging line by pulling it shut against spring resistance, safely failing to the open position on air loss.
Carton Hold-Down Clamp
Pulls a holding arm down to secure light cartons during labeling, utilizing the compact body to fit within tight conveyor frame clearances.
Is the Airtac STA Single Acting Compact Guided Cylinder STA20X30S the Right Cylinder?
When sizing this model, compare it both ways: stepping down to the STA16 provides 66.4 N net pull at 0.5 MPa, while stepping up to the STA25 offers 177.7 N at 0.5 MPa. This STA20X30S provides a safe working load of roughly 65 N, allowing a vertical lift of approximately 5.6 kg with a 2:1 safety margin.
This configuration has a 30 mm stroke, the maximum standard limit for the series. Because the spring drives the rod out when air is removed, it does not hold a mid-stroke load without live pressure. Confirm your requirements for the 20 mm bore, 30 mm stroke, M5x0.8 port, female rod thread, and the -S magnet before ordering.
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 STA20X30S FAQ
The net pull force is 108.9 N at 0.5 MPa and 161.7 N at 0.7 MPa. The operating pressure range is 0.2 to 1.0 MPa, requiring at least 0.2 MPa to overcome the internal return spring.
No, the STA20X30S is a single-acting pull type where the spring extends the rod to its rest position when air is removed. It cannot hold a mid-stroke load pneumatically; an external rod lock or a double-acting SDA cylinder is required for that function.
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