Airtac STA Single Acting Compact Guided Cylinder STA25X30B
The AirTAC Airtac STA Single Acting Compact Guided Cylinder STA25X30B is a genuine single-acting COMPACT cylinder (single acting, pull type) with a Ø25mm bore and 30mm 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.
- BoreØ25 mm
- Stroke30 mm
- Port sizeM5×0.8
- Acting typeSingle acting, pull type
- Rod threadM5×0.8 (F) / M8×1.25 (B)
- CushionFixed NBR bumper
About the Airtac STA Single Acting Compact Guided Cylinder STA25X30B
The AirTAC STA25X30B is a compact single-acting pull-type cylinder where compressed air retracts the rod and an internal spring extends it out. It yields 177.7 N of net pull at 0.5 MPa, reaching the 30 mm maximum standard stroke ceiling for this series. The short riveted body saves axial mounting depth where larger profile cylinders cannot fit.
This specific SKU features a male M8x1.25 piston rod thread and lacks a piston magnet, meaning it cannot accept reed or electronic switches. End-of-stroke deceleration is handled by a fixed NBR bumper rather than an adjustable air cushion. Operating pressure spans 0.2 to 1.0 MPa, requiring at least 0.2 MPa to overcome the return spring.
Airtac STA Single Acting Compact Guided Cylinder STA25X30B Technical Specifications
| Model | Airtac STA Single Acting Compact Guided Cylinder STA25X30B |
|---|---|
| Series | STA compact single-acting cylinder |
| Bore size | Ø25 mm |
| Stroke | 30 mm |
| Acting type | Single acting, pull type |
| Port size | M5×0.8 |
| Rod end thread | M5×0.8 female / M8×1.25 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 (Ø25mm, Pull)
| Pressure | Pull force (net) |
|---|---|
| 0.5 MPa | 178 N |
| 0.7 MPa | 260 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 STA25X30B
| STA | Compact single acting, pull type cylinder series. |
|---|---|
| 25 | Bore size in mm. |
| ×30 | 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 STA25X30B Is Used
Gate Retraction
Uses the 177.7 N pull to draw a diverter gate closed on a conveyor line, with the spring automatically opening it when air pressure drops.
Film Tensioning
Maintains steady tension on packaging web material by pulling the idler roller back against the film load during the wrap cycle.
Lift Pin Extraction
Retracts a 10 mm locating pin to release a vertically aligned workpiece, relying on the spring to deploy the pin for the next cycle.
Is the Airtac STA Single Acting Compact Guided Cylinder STA25X30B the Right Cylinder?
When sizing this unit, consider the neighboring bores: stepping down to the STA20 provides 108.9 N net pull at 0.5 MPa, while stepping up to the STA32 yields 290.1 N at the same pressure. Based on the 177.7 N figure, a safe working load is roughly 107 N, allowing a vertical lift of approximately 9.1 kg with a 2:1 safety margin.
Remember that on air loss the spring drives the rod to its extended rest position, so it cannot hold a mid-stroke load without an external device. Confirm your requirements for the 25 mm bore, 30 mm stroke, M5x0.8 port, male M8x1.25 rod thread, and the absence of a sensing 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 STA25X30B FAQ
This model provides a net pull force of 177.7 N at 0.5 MPa and 260.1 N at 0.7 MPa. These figures already account for the internal return spring resistance.
No, this specific SKU does not include a piston magnet and cannot accept sensing switches. You would need the STA25X30BS variant to utilize AirTAC reed or electronic switches.
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