Airtac STA Single Acting Compact Guided Cylinder STA50X25
The AirTAC Airtac STA Single Acting Compact Guided Cylinder STA50X25 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 STA50X25
The AirTAC STA50X25 is a compact single-acting pull-type cylinder where air retracts the rod and an internal spring extends it out. It generates 717.7 N of net pull at 0.5 MPa, reaching 1047.5 N at 0.7 MPa. Because the spring force is already subtracted, you can size directly to these net values. This bore uses a 20 mm rod and a PT1/4 port.
Designed for tight spaces, the short riveted body saves axial mounting depth where larger profile cylinders will not fit. It requires only a single air line and solenoid port to operate. A fixed NBR bumper handles end-of-stroke deceleration, and this specific SKU lacks a piston magnet so it cannot accept position switches.
Airtac STA Single Acting Compact Guided Cylinder STA50X25 Technical Specifications
| Model | Airtac STA Single Acting Compact Guided Cylinder STA50X25 |
|---|---|
| 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 STA50X25
| 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 STA50X25 Is Used
Tension Gate Retraction
Uses the 717.7 N net pull to draw a diverter gate back against a hard stop on a packaging line, letting the internal spring push it open when air is cut.
Vertical Hold-Down Pull
Pulls a lightweight clamping arm down to secure a workpiece, providing a safe working load of roughly 431 N or a 36.6 kg vertical lift with a 2:1 margin.
Carton Flap Folding
Tugs a mechanical linkage inward to fold box flaps prior to sealing, relying on the compact riveted body to fit within tight conveyor side frames.
Is the Airtac STA Single Acting Compact Guided Cylinder STA50X25 the Right Cylinder?
When sizing this model, compare it both ways: the STA40 bore provides 445.1 N at 0.5 MPa, while the larger STA63 offers 1225.5 N. The 25 mm stroke sits comfortably below the 30 mm maximum standard limit for this series. Keep in mind the spring-extend behavior; without live air pressure, the rod drives to its extended rest position and will not hold a mid-stroke load. For holding a load in place, use a double-acting SDA with an external rod lock.
This configuration features a 50 mm bore, 25 mm stroke, PT1/4 port, and a female M10x1.5 rod-end thread. It operates between 0.2 and 1.0 MPa, needing at least 0.2 MPa to overcome the return spring. Because this SKU has no -S magnet code, it cannot support reed or electronic switches. The male-threaded variant requires a B suffix.
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 STA50X25 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 between 0.2 and 1.0 MPa, with a minimum of 0.2 MPa required to overcome the spring.
No, this specific SKU does not include a piston magnet. To use AirTAC reed or electronic switches, you must order the -S variant (STA50X25S). Without the magnet, position feedback is not possible.
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