Airtac STA Single Acting Compact Guided Cylinder STA16X25SB
The AirTAC Airtac STA Single Acting Compact Guided Cylinder STA16X25SB is a genuine single-acting COMPACT cylinder (single acting, pull type) with a Ø16mm 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.
- BoreØ16 mm
- Stroke25 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 STA16X25SB
The AirTAC STA16X25SB is a compact single-acting pull-type cylinder where air retracts the rod and an internal spring extends it out. It yields 66.4 N of net pull at 0.5 MPa, making it ideal for tensioning or returning a load to an open state. The short riveted body saves axial mounting depth where larger profile cylinders will not fit.
This specific build includes a built-in piston magnet for position sensing and a male M5x0.8 rod thread. A fixed NBR bumper decelerates the stroke end, operating effectively between 50 and 500 mm/s. The spring extends the rod automatically when air pressure drops below the 0.2 MPa minimum.
Airtac STA Single Acting Compact Guided Cylinder STA16X25SB Technical Specifications
| Model | Airtac STA Single Acting Compact Guided Cylinder STA16X25SB |
|---|---|
| Series | STA compact single-acting cylinder |
| Bore size | Ø16 mm |
| Stroke | 25 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 (Ø16mm, Pull)
| Pressure | Pull force (net) |
|---|---|
| 0.5 MPa | 66 N |
| 0.7 MPa | 101 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 STA16X25SB
| STA | Compact single acting, pull type cylinder series. |
|---|---|
| 16 | 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 STA16X25SB Is Used
Gate Return Mechanism
Uses the spring-extend function to push a diverter gate back to its open position on a conveyor, using air only to pull the gate closed during sorting.
Film Tensioning Arm
Maintains steady tension on packaging film by pulling the tensioning arm in with 66.4 N of force, then releasing it smoothly via the internal spring.
Clamp Release Lever
Retracts a holding clamp during machining via the male M5x0.8 rod, allowing the fixed NBR bumper to absorb the end shock before unclamping.
Is the Airtac STA Single Acting Compact Guided Cylinder STA16X25SB the Right Cylinder?
When sizing this model, verify if the 66.4 N net pull at 0.5 MPa meets your requirement. Stepping down to the STA12 provides 32.4 N, while stepping up to the STA20 offers 108.9 N. This yields a safe working load of roughly 40 N, or a vertical lift of about 3.4 kg with a 2:1 margin.
The maximum standard stroke is 30 mm, and this 25 mm unit fits well within that limit. Because the spring drives the rod to its extended rest position on air loss, it will not hold a mid-stroke load without external devices. Confirm your bore of 16 mm, stroke of 25 mm, M5x0.8 port, male M5x0.8 rod thread, and the integrated magnet for reed or electronic switches.
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 STA16X25SB FAQ
The net pull force is 66.4 N at 0.5 MPa and 101 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 retracts the rod, and you need at least 0.2 MPa to overcome the spring. When air is released, the spring extends the rod back out, meaning it fails to the extended position and will not hold a mid-stroke load.
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