Airtac STA Single Acting Compact Guided Cylinder STA20X15B
The AirTAC Airtac STA Single Acting Compact Guided Cylinder STA20X15B 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 STA20X15B
The AirTAC STA20X15B is a compact single-acting pull-type cylinder where air retracts the rod and an internal spring pushes it back out. It provides 108.9 N of net pull at 0.5 MPa, making it suitable for tensioning and return-to-open tasks. The short riveted body saves axial mounting depth where round-body alternatives will not fit.
This specific SKU features a male M6x1.0 piston rod thread and uses an M5x0.8 air port. A fixed NBR bumper handles end-of-stroke deceleration rather than an adjustable cushion. Because this variant lacks the -S magnet code, it cannot accept reed or electronic switches.
Airtac STA Single Acting Compact Guided Cylinder STA20X15B Technical Specifications
| Model | Airtac STA Single Acting Compact Guided Cylinder STA20X15B |
|---|---|
| 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 STA20X15B
| 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 STA20X15B Is Used
Gate Return Mechanism
Uses the spring-extend function to hold a diverting gate open, applying 108.9 N of net pull at 0.5 MPa to pull the gate closed when air is applied.
Film Tensioning
Maintains steady tension on packaging film via the male M6x1.0 rod end, retracting the web under air pressure and releasing it via spring force.
Hold-Down Release
Pulls a lightweight 5.6 kg vertical clamp up and away from a workpiece, relying on the internal spring to push the clamp back into blocking position.
Is the Airtac STA Single Acting Compact Guided Cylinder STA20X15B the Right Cylinder?
When sizing this bore, note the STA16 yields 66.4 N while the STA25 yields 177.7 N net pull at 0.5 MPa. The 15 mm stroke sits well below the 30 mm series ceiling. Operating pressure must be 0.2-1.0 MPa, needing at least 0.2 MPa to overcome the spring.
Confirm the 20 mm bore, 15 mm stroke, M5x0.8 port, male M6x1.0 rod thread, and absence of a magnet. The spring extends the rod on air loss, so it does not hold a mid-stroke load without external devices. A safe working load is roughly 65 N, allowing a vertical lift of about 5.6 kg with a 2:1 margin.
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 STA20X15B FAQ
The net pull force is 108.9 N at 0.5 MPa and 161.7 N at 0.7 MPa. These figures already subtract the return spring force, which is responsible for extending the rod.
No, this specific SKU lacks the -S magnet code, so it cannot accept reed or electronic switches. You must select an STA20X15BS variant to enable position sensing.
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