Airtac STA Single Acting Compact Guided Cylinder STA63X25B
The AirTAC Airtac STA Single Acting Compact Guided Cylinder STA63X25B is a genuine single-acting COMPACT cylinder (single acting, pull type) with a Ø63mm bore and 25mm 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
- Stroke25 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 STA63X25B
The AirTAC STA63X25B is a 63 mm bore compact single-acting pull-type cylinder. Compressed air retracts the piston rod, while an internal spring extends it back out, meaning the actuator rests in a normally extended state. It yields 1225.5 N of net pull at 0.5 MPa and 1786.2 N at 0.7 MPa, with the return spring force already subtracted from the pneumatic output.
This specific SKU features a male M18x1.5 threaded rod end for direct load attachment and uses a PT1/4 port. The short riveted body significantly reduces axial mounting depth compared to round-body alternatives. Because this unit lacks the -S magnet option, it cannot accept reed or electronic switches. End-of-stroke deceleration is handled by a fixed NBR bumper rather than an adjustable cushion.
Airtac STA Single Acting Compact Guided Cylinder STA63X25B Technical Specifications
| Model | Airtac STA Single Acting Compact Guided Cylinder STA63X25B |
|---|---|
| Series | STA compact single-acting cylinder |
| Bore size | Ø63 mm |
| Stroke | 25 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 STA63X25B
| STA | Compact single acting, pull type cylinder series. |
|---|---|
| 63 | Bore size in mm. |
| ×25 | 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 STA63X25B Is Used
Heavy Pallet Gate Return
Utilizes the 1225.5 N net pull to tension and pull heavy loading dock gates closed, relying on the spring to push them back open safely when air is vented.
Vertical Platen Lowering
Air pulls the 20 mm rod down to lower a 62.5 kg platen assembly, while the internal spring extends the rod to lift the platen back to its home position.
Industrial Clamp Retraction
Draws heavy workpiece clamps inward via the male M18x1.5 thread during machining cycles, with the spring extending the clamps to release the part.
Is the Airtac STA Single Acting Compact Guided Cylinder STA63X25B the Right Cylinder?
When sizing this actuator, compare its 1225.5 N net pull at 0.5 MPa against adjacent bores. Stepping down, the STA50 provides 717.7 N at the same pressure, representing a 41% reduction in force capacity. The 63 mm bore here offers a safe working load around 735 N, roughly 60% of its 0.5 MPa rating, which translates to a vertical lift capacity of approximately 62.5 kg with a 2:1 safety margin.
This 25 mm stroke sits well below the 30 mm series ceiling. Remember that the internal spring drives the rod out upon air loss, so the STA63X25B cannot hold a mid-stroke load without live pressure or an external locking device. Operating pressure must be at least 0.2 MPa to overcome the spring, up to a maximum of 1.0 MPa. Confirm your requirements for the PT1/4 port, male M18x1.5 rod thread, and the lack of a piston magnet 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 STA63X25B FAQ
The STA63X25B provides a net pull force of 1225.5 N at 0.5 MPa and 1786.2 N at 0.7 MPa. Operating pressure ranges from 0.2 MPa to 1.0 MPa, with a minimum of 0.2 MPa required to overcome the internal return spring.
As a single-acting pull-type cylinder, air retracts the rod and the spring extends it. If air pressure is lost, the spring drives the rod to its fully extended rest position. It cannot hold a mid-stroke load, and the fixed NBR bumper only decelerates the stroke end rather than locking it.
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