Airtac STA Single Acting Compact Guided Cylinder STA20X25S
The AirTAC Airtac STA Single Acting Compact Guided Cylinder STA20X25S is a genuine single-acting COMPACT cylinder (single acting, pull type) with a Ø20mm 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.
- BoreØ20 mm
- Stroke25 mm
- Port sizeM5×0.8
- Acting typeSingle acting, pull type
- Rod threadM4×0.7 (F) / M6×1.0 (B)
- CushionFixed NBR bumper
About the Airtac STA Single Acting Compact Guided Cylinder STA20X25S
The AirTAC STA20X25S is a compact single-acting pull-type cylinder. Air pressure retracts the 8 mm rod, while an internal spring extends it back out, leaving the unit normally extended at rest. It yields 108.9 N of net pull at 0.5 MPa, safely handling a working load of roughly 65 N or vertically lifting about 5.6 kg with a 2:1 margin.
This thin riveted body saves valuable axial mounting depth where larger profile cylinders cannot fit. It uses a single M5x0.8 port for plumbing and features a fixed NBR bumper to decelerate the stroke end. The integrated -S magnet enables position sensing with AirTAC reed or electronic switches.
Airtac STA Single Acting Compact Guided Cylinder STA20X25S Technical Specifications
| Model | Airtac STA Single Acting Compact Guided Cylinder STA20X25S |
|---|---|
| Series | STA compact single-acting cylinder |
| Bore size | Ø20 mm |
| Stroke | 25 mm |
| Acting type | Single acting, pull type |
| Port size | M5×0.8 |
| Rod end thread | M4×0.7 female / M6×1.0 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 (Ø20mm, Pull)
| Pressure | Pull force (net) |
|---|---|
| 0.5 MPa | 109 N |
| 0.7 MPa | 162 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 STA20X25S
| STA | Compact single acting, pull type cylinder series. |
|---|---|
| 20 | 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 STA20X25S Is Used
Tension Gate Return
Uses the 108.9 N net pull to draw a guard gate closed, relying on the internal spring to automatically reopen it when air pressure drops.
Package Hold-Down
Pulls a lightweight clamping bracket down onto a moving conveyor belt, using the spring-extend function to release the load quickly.
Sorter Diverter Pull
Retracts a routing flap on a logistics line, taking advantage of the short 25 mm stroke and compact riveted body to fit in tight frame spaces.
Is the Airtac STA Single Acting Compact Guided Cylinder STA20X25S the Right Cylinder?
When sizing this unit, compare its 108.9 N net pull at 0.5 MPa against adjacent bores: the STA16 provides 66.4 N, while the STA25 offers 177.7 N. This 20 mm bore sits perfectly in the middle for medium-duty tensioning. The 25 mm stroke respects the 30 mm maximum limit for this series.
Remember that the spring drives the rod out upon air loss, so it cannot hold a mid-stroke load without live pressure or an external lock. Operating pressure must be 0.2-1.0 MPa to overcome the spring. Confirm your requirements for the M5x0.8 port, the female M4x0.7 rod-end thread, and the -S magnet for reed or solid-state sensing.
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 STA20X25S FAQ
The net pull force is 108.9 N at 0.5 MPa and 161.7 N at 0.7 MPa. These figures already account for the internal return spring, meaning this is the actual usable force generated by the air during the retraction stroke.
Air pressure retracts the rod, and the internal spring extends it, requiring a minimum operating pressure of 0.2 MPa to overcome the spring. The -S option adds a piston magnet for position detection using AirTAC reed or electronic switches.
Authorized Export Seller
Genuine AirTAC parts produced by AirTAC factory.
1-Year Warranty
Covers non-human-caused product damage.
Fast Dispatch
Standard models usually ship in 3-4 days.
Fast Reply
Most inquiries answered within 7-8 hours.
Related AirTAC STA Cylinders
Request a Quote for Airtac STA Single Acting Compact Guided Cylinder STA20X25S
Send us the quantity and destination. We confirm price, stock and lead time — usually within 7-8 hours.