Airtac STA Single Acting Compact Guided Cylinder STA12X20B
The AirTAC Airtac STA Single Acting Compact Guided Cylinder STA12X20B 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 STA12X20B
The AirTAC STA12X20B is a compact single-acting pull-type cylinder where air retracts the rod and an internal spring pushes it back out. It generates 32.4 N of net pull at 0.5 MPa, making it suitable for light tensioning and return-to-open tasks. The short riveted body saves axial mounting depth where a round-body or profile cylinder will not fit.
This specific SKU features a male M5x0.8 piston rod thread and a 6 mm rod diameter. It uses a single M5x0.8 air port, requiring only one pneumatic line to actuate. The quoted force is already net of the return spring, so you can size directly to the 32.4 N figure without calculating spring resistance.
Airtac STA Single Acting Compact Guided Cylinder STA12X20B Technical Specifications
| Model | Airtac STA Single Acting Compact Guided Cylinder STA12X20B |
|---|---|
| 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 STA12X20B
| 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 STA12X20B Is Used
Light-Part Tensioning
Uses the 32.4 N net pull to draw small components back against a stop, relying on the spring to release tension when air is removed.
Package Deflector Return
Air retracts the male M5x0.8 rod to pull a sorting flap out of the lane, letting the internal spring snap it back to block traffic.
Lid Hold-Down Release
Overcomes a 1.7 kg vertical load with a 2:1 margin by pulling a lightweight clamp open, with the spring extending to secure the lid at rest.
Is the Airtac STA Single Acting Compact Guided Cylinder STA12X20B the Right Cylinder?
When sizing this model, the 32.4 N net pull at 0.5 MPa yields a safe working load of roughly 19 N, or a vertical lift capacity of about 1.7 kg with a 2:1 safety margin. If your application requires slightly more force, stepping up to the STA16 bore provides 66.4 N of net pull at 0.5 MPa, while the 12 mm bore is the smallest available option in this series.
This unit has a 20 mm stroke, well within the 30 mm maximum standard stroke ceiling. Because it is spring-extended, the STA12X20B does not hold a mid-stroke load on air loss; the spring drives the rod out to its extended rest position. Confirm your requirements for the male M5x0.8 rod thread, M5x0.8 port, and note this SKU lacks the -S magnet option for position sensing.
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 STA12X20B FAQ
This single-acting pull cylinder provides 32.4 N of net pull at 0.5 MPa and 49.4 N at 0.7 MPa. These figures already account for the internal return spring resistance.
No, this specific SKU does not include the -S magnet code, so it cannot accept AirTAC reed or electronic switches. You must select the -S variant to enable position sensing.
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