Airtac STA Single Acting Compact Guided Cylinder STA63X20S
The AirTAC Airtac STA Single Acting Compact Guided Cylinder STA63X20S 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 STA63X20S
The AirTAC STA63X20S is a compact single-acting pull-type cylinder where compressed air retracts the rod and an internal spring extends it back out. It yields 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 inherently fail-safe to the extended position upon air loss.
The short riveted body drastically saves axial mounting depth compared to round-body alternatives. It features a 20 mm piston rod, a PT1/4 air port, and a built-in piston magnet for position sensing. A fixed NBR bumper decelerates the stroke ends, providing reliable shock absorption within the 50-500 mm/s speed range.
Airtac STA Single Acting Compact Guided Cylinder STA63X20S Technical Specifications
| Model | Airtac STA Single Acting Compact Guided Cylinder STA63X20S |
|---|---|
| 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 STA63X20S
| 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 STA63X20S Is Used
Heavy-Duty Tensioning
Pulls heavy cables or belts with 1225.5 N net force at 0.5 MPa, releasing tension instantly when air is vented.
Pallet Gate Return
Utilizes the spring-extend function to force heavy guide gates back open, ensuring safe fail-safe routing on conveyors.
Clamp Release Mechanism
Retracts a 20 mm rod to disengage thick steel clamps, relying on the internal spring to re-engage the hold securely.
Is the Airtac STA Single Acting Compact Guided Cylinder STA63X20S the Right Cylinder?
When sizing this 63 mm bore, verify the 1225.5 N net pull at 0.5 MPa is sufficient for your tensioning or pull-in duty. Stepping down, the STA50 provides 717.7 N at 0.5 MPa, serving as the next lower option. Since 63 mm is the largest STA bore, no larger single-acting pull variant exists in this family.
This configuration has a 20 mm stroke (well under the 30 mm ceiling) and includes the -S magnet for AirTAC reed or electronic switches. Confirm if you need the female M10x1.5 or male M18x1.5 rod-end thread. Remember that the spring drives the rod out when air is released; it will not hold a mid-stroke load without live pressure or an external lock.
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 STA63X20S FAQ
The net pull force is 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 is subtracted from the raw pneumatic pull.
Air pressure retracts the rod, requiring at least 0.2 MPa to overcome the spring. When air is released, the internal spring extends the rod back out. The included -S magnet allows tracking with reed or electronic switches.
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