Airtac STA Single Acting Compact Guided Cylinder STA12X20
The AirTAC Airtac STA Single Acting Compact Guided Cylinder STA12X20 is a genuine single-acting COMPACT cylinder (single acting, pull type) with a Ø12mm 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.
- BoreØ12 mm
- Stroke20 mm
- Port sizeM5×0.8
- Acting typeSingle acting, pull type
- Rod threadM3×0.5 (F) / M5×0.8 (B)
- CushionFixed NBR bumper
About the Airtac STA Single Acting Compact Guided Cylinder STA12X20
The AirTAC STA12X20 is a compact single-acting pull-type cylinder where air retracts the rod and an internal spring extends it back out. It provides 32.4 N of net pull at 0.5 MPa, making it suitable for light tensioning and return-to-open tasks. Because the spring performs the extension stroke, only one air line and solenoid are needed.
This model features a short riveted body that saves axial mounting depth where round-body or profile cylinders will not fit. It uses a fixed NBR bumper to decelerate the stroke end rather than an adjustable air cushion. The 6 mm rod and M5x0.8 port keep the footprint minimal for tight machinery layouts.
Airtac STA Single Acting Compact Guided Cylinder STA12X20 Technical Specifications
| Model | Airtac STA Single Acting Compact Guided Cylinder STA12X20 |
|---|---|
| Series | STA compact single-acting cylinder |
| Bore size | Ø12 mm |
| Stroke | 20 mm |
| Acting type | Single acting, pull type |
| Port size | M5×0.8 |
| Rod end thread | M3×0.5 female / M5×0.8 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 (Ø12mm, Pull)
| Pressure | Pull force (net) |
|---|---|
| 0.5 MPa | 32 N |
| 0.7 MPa | 49 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 STA12X20
| STA | Compact single acting, pull type cylinder series. |
|---|---|
| 12 | 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 STA12X20 Is Used
Light Tensioning
Pulls small cables or light gates shut with 32.4 N net force, relying on the internal spring to push them back open when air is released.
Part Ejection
Retracts a small pin to release tiny stamped components in a confined space, using the 6 mm rod and compact riveted body to save axial depth.
Flap Diversion
Draws a sorting flap inward on a conveyor line, allowing the fixed NBR bumper to absorb the end shock before the spring extends it back to rest.
Is the Airtac STA Single Acting Compact Guided Cylinder STA12X20 the Right Cylinder?
When sizing this 12 mm bore, note it yields 32.4 N net pull at 0.5 MPa, offering a safe working load around 19 N for reliable operation. If your application requires more force, the next bore up is the STA16, which provides 66.4 N at 0.5 MPa. As the smallest bore in the series, there is no smaller STA variant to step down to.
This SKU has a 20 mm stroke, well under the 30 mm series ceiling, and lacks a piston magnet so it cannot accept sensing switches. Remember that on air loss the spring drives the rod to the extended position, meaning it does not hold a mid-stroke load. Confirm your requirements for the M5x0.8 port, female M3x0.5 rod thread, and operating pressure of 0.2-1.0 MPa.
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 STA12X20 FAQ
This model delivers a net pull force of 32.4 N at 0.5 MPa and 49.4 N at 0.7 MPa. These figures already account for the internal spring resistance, so you can size directly to these values.
No, this specific SKU does not include a piston magnet and cannot accept reed or electronic switches. You would need the STA12X20S variant to enable sensor functionality along the body grooves.
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