Airtac STA Single Acting Compact Guided Cylinder STA12X20S
The AirTAC Airtac STA Single Acting Compact Guided Cylinder STA12X20S 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 STA12X20S
The AirTAC STA12X20S is a compact single-acting pull-type cylinder where air retracts the 6 mm rod and an internal spring pushes it back out. It yields 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 cylinder will not fit.
This unit carries the S option for a built-in piston magnet, allowing position detection with AirTAC reed or electronic switches. End-of-stroke deceleration relies on a fixed NBR bumper rather than an adjustable air cushion. It operates at 50-500 mm/s and requires at least 0.2 MPa of supply pressure to overcome the return spring.
Airtac STA Single Acting Compact Guided Cylinder STA12X20S Technical Specifications
| Model | Airtac STA Single Acting Compact Guided Cylinder STA12X20S |
|---|---|
| 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 STA12X20S
| 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 STA12X20S Is Used
Light-Part Ejection
Uses the 32.4 N pull to draw a small ejector pin back against spring tension, releasing delicate stamped components without bending them.
Package Deflector Return
Air retracts a routing flap to let downstream cartons pass, then the spring extends it to divert subsequent items on a sorting line.
Lab Sample Gate
Holds a small access door open via spring force, pulling it shut momentarily to drop test vials into a processing chute.
Is the Airtac STA Single Acting Compact Guided Cylinder STA12X20S the Right Cylinder?
For sizing, the 12 mm bore provides 32.4 N net pull at 0.5 MPa, offering a safe working load of roughly 19 N for a 2:1 margin. If your application requires more force, stepping up to the STA16X20S increases the 0.5 MPa net pull to 66.4 N. As 12 mm is the smallest available STA bore, there is no smaller option to step down to.
This 20 mm stroke sits well below the 30 mm single-acting limit. Remember that the spring drives the rod to its extended rest position on air loss, so the STA12X20S will not hold a mid-stroke load without external locking. Confirm your requirements for the M5x0.8 port, the female M3x0.5 rod-end thread, and the magnetic S option 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 STA12X20S FAQ
The STA12X20S provides a net pull of 32.4 N at 0.5 MPa and 49.4 N at 0.7 MPa. These figures already account for the internal return spring force being subtracted.
Air pressure retracts the rod, while the internal spring extends it. You need a minimum of 0.2 MPa operating pressure to overcome the spring. On air loss, the spring forces the rod to the extended position.
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 STA12X20S
Send us the quantity and destination. We confirm price, stock and lead time — usually within 7-8 hours.