Airtac STA Single Acting Compact Guided Cylinder STA25X15
The AirTAC Airtac STA Single Acting Compact Guided Cylinder STA25X15 is a genuine single-acting COMPACT cylinder (single acting, pull type) with a Ø25mm bore and 15mm 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
- Stroke15 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 STA25X15
The AirTAC STA25X15 is a compact single-acting pull-type cylinder where air retracts the rod and an internal spring extends it back out. It yields 177.7 N of net pull at 0.5 MPa, making it ideal for tensioning and return-to-open duties. Because the quoted force is already net of the spring, you can size directly to this value.
This unit features a short riveted body that saves axial mounting depth where round-body cylinders fail to fit. It uses a fixed NBR bumper to decelerate the stroke end rather than an adjustable air cushion. This specific SKU lacks a piston magnet, so it cannot accept position switches without upgrading to the -S variant.
Airtac STA Single Acting Compact Guided Cylinder STA25X15 Technical Specifications
| Model | Airtac STA Single Acting Compact Guided Cylinder STA25X15 |
|---|---|
| Series | STA compact single-acting cylinder |
| Bore size | Ø25 mm |
| Stroke | 15 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 STA25X15
| STA | Compact single acting, pull type cylinder series. |
|---|---|
| 25 | Bore size in mm. |
| ×15 | 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 STA25X15 Is Used
Film Web Tensioning
Pulls a tensioning idler roller back against packaging film with 177.7 N net force, releasing automatically to a relaxed state on air loss.
Safety Gate Latching
Draws a guard door pin inward to secure the latch, relying on the internal spring to push the pin out and open the gate when air is removed.
Package Deflector Return
Retracts a sorting diverter arm to let cartons pass, using the spring-extend function to push the arm back into the divert path safely.
Is the Airtac STA Single Acting Compact Guided Cylinder STA25X15 the Right Cylinder?
When sizing this 25 mm bore, compare it both ways: the STA20 provides 108.9 N net pull at 0.5 MPa, while the STA32 offers 290.1 N. The 15 mm stroke sits well below the 30 mm maximum limit for the series. A safe working load is roughly 107 N, or a vertical lift of about 9.1 kg with a 2:1 margin.
Remember that the spring drives the rod out upon air loss, so it will not hold a mid-stroke load without external locking. Operating pressure must be 0.2-1.0 MPa to overcome the spring. Confirm your bore, 15 mm stroke, M5x0.8 port, female rod-end thread, and lack of magnet for this configuration.
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 STA25X15 FAQ
This cylinder provides 177.7 N of net pull at 0.5 MPa and 260.1 N at 0.7 MPa. It requires an operating pressure of 0.2-1.0 MPa, as at least 0.2 MPa is needed to overcome the internal return spring.
No, this specific SKU does not include a piston magnet. You must select the STA25X15S variant to use AirTAC reed or electronic switches for position sensing.
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