Airtac STA Single Acting Compact Guided Cylinder STA50X25S
The AirTAC Airtac STA Single Acting Compact Guided Cylinder STA50X25S is a genuine single-acting COMPACT cylinder (single acting, pull type) with a Ø50mm 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.
- BoreØ50 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 STA50X25S
The AirTAC STA50X25S is a compact single-acting pull-type cylinder where air retracts the rod and an internal spring extends it back out. It provides 717.7 N of net pull at 0.5 MPa and 1047.5 N at 0.7 MPa. The quoted force is already net of the return spring, meaning you size directly to these values without manual subtraction.
Featuring a short riveted body, this unit saves axial mounting depth where round-body or profile cylinders cannot fit. It uses a fixed NBR bumper to decelerate the stroke end rather than an adjustable cushion. The built-in -S piston magnet supports position sensing using AirTAC reed or electronic switches mounted in the body grooves.
Airtac STA Single Acting Compact Guided Cylinder STA50X25S Technical Specifications
| Model | Airtac STA Single Acting Compact Guided Cylinder STA50X25S |
|---|---|
| Series | STA compact single-acting cylinder |
| Bore size | Ø50 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 (Ø50mm, Pull)
| Pressure | Pull force (net) |
|---|---|
| 0.5 MPa | 718 N |
| 0.7 MPa | 1048 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 STA50X25S
| STA | Compact single acting, pull type cylinder series. |
|---|---|
| 50 | 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 STA50X25S Is Used
Tension Gate Closure
Uses the 717.7 N pull to draw a conveyor diverter gate inward, letting the internal spring push it back to the open rest position when air drops.
Carton Hold-Down
Pulls a clamping arm out of the way for carton loading, then relies on spring extension to secure the package during the sealing cycle.
Vertical Lift Retract
Handles a 36.6 kg vertical lift with a 2:1 safety margin by pulling the load up, with the spring safely lowering it upon air release.
Is the Airtac STA Single Acting Compact Guided Cylinder STA50X25S the Right Cylinder?
When sizing this model, compare its 717.7 N net pull at 0.5 MPa against adjacent bores: the STA40 yields 445.1 N, while the STA63 provides 1225.5 N. A practical safe working load is roughly 431 N, allowing a vertical lift of about 36.6 kg with a 2:1 margin. Keep within the 30 mm standard stroke ceiling and the 50-500 mm/s speed range.
Remember the spring extends the rod when air is removed, so it does not hold a mid-stroke load without live pressure. This STA50X25S configuration has a 50 mm bore, 25 mm stroke, PT1/4 port, and a female M10x1.5 rod-end thread. The -S magnet code is present for sensing, and operating pressure must be 0.2-1.0 MPa to overcome the spring.
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 STA50X25S FAQ
The net pull force is 717.7 N at 0.5 MPa and 1047.5 N at 0.7 MPa. These figures already account for the return spring. Operating pressure must be 0.2-1.0 MPa, as at least 0.2 MPa is required to overcome the spring.
Air pressure retracts the rod, while the internal spring extends it to the rest position. It does not hold a mid-stroke load without live air pressure. The included -S magnet works with AirTAC reed or electronic switches for position detection.
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