Airtac STA Single Acting Compact Guided Cylinder STA20X20
The AirTAC Airtac STA Single Acting Compact Guided Cylinder STA20X20 is a genuine single-acting COMPACT cylinder (single acting, pull type) with a Ø20mm bore and 20mm 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
- Stroke20 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 STA20X20
The AirTAC STA20X20 is a compact single-acting pull-type cylinder where compressed air retracts the 8 mm rod and an internal spring pushes it back out. It provides 108.9 N of net pull at 0.5 MPa and 161.7 N at 0.7 MPa, yielding a safe working load of roughly 65 N or a vertical lift capacity of about 5.6 kg with a 2:1 margin.
Designed to save axial mounting depth, the short riveted body fits where standard round-body units cannot. The bore-fixed M5x0.8 air port requires just one line and one solenoid valve. Because this SKU lacks the -S magnet option, it cannot accept position switches, and a fixed NBR bumper decelerates the stroke end rather than an adjustable cushion.
Airtac STA Single Acting Compact Guided Cylinder STA20X20 Technical Specifications
| Model | Airtac STA Single Acting Compact Guided Cylinder STA20X20 |
|---|---|
| Series | STA compact single-acting cylinder |
| Bore size | Ø20 mm |
| Stroke | 20 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 STA20X20
| STA | Compact single acting, pull type cylinder series. |
|---|---|
| 20 | Bore size in mm. |
| ×20 | 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 STA20X20 Is Used
Tension Gate Return
Uses the 108.9 N net pull to draw a diverter gate inward, letting the spring push it open to guide packages down the line.
Film Clamp Release
Pulls a sealing jaw out of the way with 161.7 N at 0.7 MPa, relying on the spring to safely extend the jaw when air is removed.
Light Load Retraction
Draws a 5.6 kg tooling plate upward, taking advantage of the compact riveted body to fit within tight vertical assembly spaces.
Is the Airtac STA Single Acting Compact Guided Cylinder STA20X20 the Right Cylinder?
When sizing this 20 mm bore, stepping down to the STA16 yields 66.4 N of net pull at 0.5 MPa, while stepping up to the STA25 provides 177.7 N. This model operates between 0.2 and 1.0 MPa, needing at least 0.2 MPa to overcome the internal spring, and respects the 30 mm maximum standard stroke ceiling.
Remember that the spring constantly drives the rod to the extended position, so the STA20X20 will not hold a mid-stroke load without live air pressure. Verify your requirements for the 20 mm bore, 20 mm stroke, M5x0.8 port, female M4x0.7 rod thread, and the absence of a piston 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 STA20X20 FAQ
The net pull force is 108.9 N at 0.5 MPa and 161.7 N at 0.7 MPa. These figures already account for the internal return spring, so you can size directly to these values.
No, this specific SKU does not include the -S magnet and cannot accept reed or electronic switches. You would need the -S variant for position sensing.
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