Airtac STA Single Acting Compact Guided Cylinder STA32X20
The AirTAC Airtac STA Single Acting Compact Guided Cylinder STA32X20 is a genuine single-acting COMPACT cylinder (single acting, pull type) with a Ø32mm 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.
- BoreØ32 mm
- Stroke20 mm
- Port sizePT1/8
- Acting typeSingle acting, pull type
- Rod threadM6×1.0 (F) / M10×1.25 (B)
- CushionFixed NBR bumper
About the Airtac STA Single Acting Compact Guided Cylinder STA32X20
The AirTAC STA32X20 is a compact single-acting pull-type cylinder where compressed air retracts the 12 mm rod and an internal spring pushes it back out. At 0.5 MPa it generates 290.1 N of net pull, increasing to 428.3 N at 0.7 MPa. Because the spring handles the extension stroke, you only need one air line and one solenoid port to operate it.
This thin riveted-body design saves axial mounting depth in tight machinery where standard cylinders will not fit. The bore dictates a PT1/8 port and a female M6x1.0 rod-end thread. End-of-stroke shock is absorbed by a fixed NBR bumper, which decelerates the piston without acting as a lock or adjustable cushion.
Airtac STA Single Acting Compact Guided Cylinder STA32X20 Technical Specifications
| Model | Airtac STA Single Acting Compact Guided Cylinder STA32X20 |
|---|---|
| Series | STA compact single-acting cylinder |
| Bore size | Ø32 mm |
| Stroke | 20 mm |
| Acting type | Single acting, pull type |
| Port size | PT1/8 |
| Rod end thread | M6×1.0 female / M10×1.25 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 (Ø32mm, Pull)
| Pressure | Pull force (net) |
|---|---|
| 0.5 MPa | 290 N |
| 0.7 MPa | 428 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 STA32X20
| STA | Compact single acting, pull type cylinder series. |
|---|---|
| 32 | 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 STA32X20 Is Used
Tension Gate Closure
Uses the 290.1 N net pull to draw a conveyor diverter gate inward against belt vibration, letting the spring push it open when air stops.
Film Roll Hold-Down
Pulls a packaging film tensioning arm back during the wrap cycle, relying on the compact 32 mm body to fit within narrow machine frames.
Component Ejector Pull
Retracts a 12 mm rod to pull an assembled part clear of a fixture, using the fixed NBR bumper to absorb the sudden end-of-stroke shock.
Is the Airtac STA Single Acting Compact Guided Cylinder STA32X20 the Right Cylinder?
When sizing this 32 mm bore, sizing both ways shows the STA25 provides 177.7 N at 0.5 MPa, while the STA40 offers 445.1 N. This makes the STA32X20 ideal for a safe working load around 174 N, roughly 60 percent of its 0.5 MPa rating, allowing a vertical lift of about 14.8 kg with a 2:1 margin.
Remember the 30 mm maximum standard stroke ceiling and that the spring extends the rod to rest when air is removed, meaning it cannot hold a mid-stroke load without external pressure. This specific SKU lacks a piston magnet, so it cannot accept reed or electronic switches; choose the -S option if sensing is required. Confirm your bore, 20 mm stroke, PT1/8 port, and female M6x1.0 thread requirements 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 STA32X20 FAQ
The STA32X20 provides 290.1 N of net pull at 0.5 MPa and 428.3 N at 0.7 MPa. These figures already account for the internal return spring resistance, so you can size directly to these values.
Air pressure must be at least 0.2 MPa to overcome the spring and retract the rod. If air is lost, the spring automatically extends the rod to its resting position; it will not hold a mid-stroke load without live pressure or an external lock.
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