Airtac STA Single Acting Compact Guided Cylinder STA63X20
The AirTAC Airtac STA Single Acting Compact Guided Cylinder STA63X20 is a genuine single-acting COMPACT cylinder (single acting, pull type) with a Ø63mm 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.
- BoreØ63 mm
- Stroke20 mm
- Port sizePT1/4
- Acting typeSingle acting, pull type
- Rod threadM10×1.5 (F) / M18×1.5 (B)
- CushionFixed NBR bumper
About the Airtac STA Single Acting Compact Guided Cylinder STA63X20
The AirTAC STA63X20 is a 63 mm bore compact single-acting pull-type cylinder where air retracts the rod and an internal spring extends it. It generates 1225.5 N of net pull at 0.5 MPa and 1786.2 N at 0.7 MPa, with the spring force already subtracted from the pneumatic effort. This makes it suitable for heavy-duty tensioning, clamping, or return-to-open mechanisms requiring significant force.
The short riveted body saves axial mounting depth where a standard round-body or profile cylinder will not fit. A fixed NBR bumper decelerates the stroke end, operating effectively across a 50-500 mm/s speed range. Since this specific SKU lacks the -S magnet option, it cannot accept reed or electronic switches.
Airtac STA Single Acting Compact Guided Cylinder STA63X20 Technical Specifications
| Model | Airtac STA Single Acting Compact Guided Cylinder STA63X20 |
|---|---|
| Series | STA compact single-acting cylinder |
| Bore size | Ø63 mm |
| Stroke | 20 mm |
| Acting type | Single acting, pull type |
| Port size | PT1/4 |
| Rod end thread | M10×1.5 female / M18×1.5 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 (Ø63mm, Pull)
| Pressure | Pull force (net) |
|---|---|
| 0.5 MPa | 1226 N |
| 0.7 MPa | 1786 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 STA63X20
| STA | Compact single acting, pull type cylinder series. |
|---|---|
| 63 | 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 STA63X20 Is Used
Heavy Web Tensioning
Utilizes the 1225.5 N net pull at 0.5 MPa to maintain high tension on thick material webs, with the internal spring safely extending the rod when air pressure drops.
Industrial Gate Closing
Pulls heavy safety gates shut using pneumatic force, relying on the spring to push the barrier back open and fail-safe to the extended position during an outage.
Pallet Hold-Down
Draws a 20 mm stroke to secure heavy pallets during wrapping or transport, applying up to 1786.2 N of pulling force at 0.7 MPa to keep loads firmly restrained.
Is the Airtac STA Single Acting Compact Guided Cylinder STA63X20 the Right Cylinder?
When sizing this model, consider the adjacent bore options. Stepping down, the STA50 provides 717.7 N of net pull at 0.5 MPa, which is substantially less than this 63 mm bore. Because the STA63X20 sits at the top of the single-acting range, there is no larger bore available for increased pull force. Based on the 1225.5 N figure at 0.5 MPa, a safe working load is approximately 735 N, allowing a vertical lift of roughly 62.5 kg with a 2:1 margin.
Remember that the 20 mm stroke is well within the 30 mm maximum ceiling for this series. The spring extends the rod to its rest position upon air loss, meaning it does not hold a mid-stroke load without live pressure. This configuration features a PT1/4 port, a 20 mm rod, a female M10x1.5 rod-end thread, and no piston magnet.
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 STA63X20 FAQ
The STA63X20 provides a net pull force of 1225.5 N at 0.5 MPa and 1786.2 N at 0.7 MPa. These figures already account for the internal return spring resistance, meaning the spring force has been subtracted from the total pneumatic effort.
Air pressure retracts the rod, while the internal spring extends it. It requires a minimum of 0.2 MPa operating pressure to overcome the spring. Upon air loss, the spring drives the rod to its extended rest position, so it will not hold a mid-stroke load without live pressure.
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