Airtac STA Single Acting Compact Guided Cylinder STA20X15S
The AirTAC Airtac STA Single Acting Compact Guided Cylinder STA20X15S is a genuine single-acting COMPACT cylinder (single acting, pull type) with a Ø20mm bore and 15mm 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
- Stroke15 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 STA20X15S
The AirTAC STA20X15S is a compact single-acting pull-type cylinder where compressed air retracts the 8 mm piston rod and an internal spring pushes it back out. It generates 108.9 N of net pull at 0.5 MPa, meaning the quoted force already subtracts the spring resistance. This makes it inherently fail-safe to the extended position upon air loss.
Designed for tight spaces, the short riveted body saves axial mounting depth where larger profile cylinders will not fit. The unit features a fixed NBR bumper to decelerate the stroke end, and because this is the -S variant, a built-in piston magnet enables position detection with AirTAC reed or electronic switches.
Airtac STA Single Acting Compact Guided Cylinder STA20X15S Technical Specifications
| Model | Airtac STA Single Acting Compact Guided Cylinder STA20X15S |
|---|---|
| Series | STA compact single-acting cylinder |
| Bore size | Ø20 mm |
| Stroke | 15 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 STA20X15S
| STA | Compact single acting, pull type cylinder series. |
|---|---|
| 20 | Bore size in mm. |
| ×15 | 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 STA20X15S Is Used
Tension Gate Release
Uses the 108.9 N net pull to retract a guide and open a conveyor diverter gate, relying on the internal spring to snap it shut when air stops.
Clamp Retraction
Pulls a holding pin out of the way to release a filled carton, with the spring-extend function ensuring the pin defaults to the blocking position.
Wire Tensioning
Draws a tensioning idler back against a wire bundle during a cutting cycle, saving axial depth in the machine frame with its compact riveted body.
Is the Airtac STA Single Acting Compact Guided Cylinder STA20X15S the Right Cylinder?
When sizing this 20 mm bore, compare its 108.9 N net pull at 0.5 MPa against adjacent bores. Stepping down, the STA16 yields 66.4 N; stepping up, the STA25 provides 177.7 N. A practical safe working load is roughly 65 N, allowing a vertical lift of about 5.6 kg with a 2:1 safety margin.
Remember the 30 mm standard stroke ceiling and that the spring drives the rod out when air is released—it will not hold a mid-stroke load without live pressure. This STA20X15S has a 15 mm stroke, an M5x0.8 port, a female M4x0.7 rod-end thread, and includes the -S magnet for sensors.
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 STA20X15S FAQ
This cylinder provides a net pull of 108.9 N at 0.5 MPa and 161.7 N at 0.7 MPa. These values already account for the internal spring resistance, so you can size directly to the net pull figure.
Air pressure retracts the rod, requiring a minimum of 0.2 MPa to overcome the spring. When air is released, the spring extends the rod back out, meaning it does not hold a mid-stroke load without live pressure.
Authorized Export Seller
Genuine AirTAC parts produced by AirTAC factory.
1-Year Warranty
Covers non-human-caused product damage.
Fast Dispatch
Standard models usually ship in 3-4 days.
Fast Reply
Most inquiries answered within 7-8 hours.
Related AirTAC STA Cylinders
Request a Quote for Airtac STA Single Acting Compact Guided Cylinder STA20X15S
Send us the quantity and destination. We confirm price, stock and lead time — usually within 7-8 hours.