Airtac STA Single Acting Compact Guided Cylinder STA20X5S
The AirTAC Airtac STA Single Acting Compact Guided Cylinder STA20X5S is a genuine single-acting COMPACT cylinder (single acting, pull type) with a Ø20mm bore and 5mm 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
- Stroke5 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 STA20X5S
The AirTAC STA20X5S is a compact single-acting pull-type cylinder where air retracts the rod and an internal spring extends it out. It provides 108.9 N of net pull at 0.5 MPa, meaning the spring force is already subtracted from the pneumatic effort. This 20 mm bore, 5 mm stroke unit uses a single air line and one solenoid port to execute its tension duty.
The short riveted body saves axial mounting depth where standard round-body or profile cylinders will not fit. It features an 8 mm piston rod, an M5x0.8 port, and a fixed NBR bumper at each end to decelerate the stroke. Because the -S option is present, a built-in piston magnet allows position detection using an AirTAC reed or electronic switch.
Airtac STA Single Acting Compact Guided Cylinder STA20X5S Technical Specifications
| Model | Airtac STA Single Acting Compact Guided Cylinder STA20X5S |
|---|---|
| Series | STA compact single-acting cylinder |
| Bore size | Ø20 mm |
| Stroke | 5 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 STA20X5S
| STA | Compact single acting, pull type cylinder series. |
|---|---|
| 20 | Bore size in mm. |
| ×5 | 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 STA20X5S Is Used
Film Web Tensioning
Uses the 108.9 N net pull to maintain consistent tension on packaging film webs, with the spring automatically extending the rod to release tension when air is removed.
Clamp Release Mechanism
Air retracts the 8 mm rod to pull a holding clamp open against the spring, providing a fail-safe extended release for held workpieces during power loss.
Diverter Gate Return
Employs the short 5 mm stroke to pull a sorting diverter gate closed on a conveyor line, relying on the internal spring to push the gate back open.
Is the Airtac STA Single Acting Compact Guided Cylinder STA20X5S the Right Cylinder?
When sizing this model, compare its 108.9 N net pull at 0.5 MPa against adjacent bores: the STA16 yields 66.4 N, while the STA25 provides 177.7 N. A practical safe working load is roughly 65 N, or a vertical lift of about 5.6 kg with a 2:1 margin. Operating pressure must be 0.2-1.0 MPa, requiring at least 0.2 MPa to overcome the return spring.
This configuration has a 5 mm stroke, well under the 30 mm single-acting ceiling. Remember that on air loss the spring drives the rod to the extended position, so it cannot hold a mid-stroke load without an external rod lock. Confirm your bore, stroke, M5x0.8 port, female M4x0.7 rod thread, and the required -S magnet for sensor integration.
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 STA20X5S 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 being subtracted from the pneumatic effort.
Air pressure retracts the rod, and you need at least 0.2 MPa to overcome the spring. When air is released, the spring extends the rod back out, meaning it will not hold a mid-stroke load without an external locking device.
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 STA20X5S
Send us the quantity and destination. We confirm price, stock and lead time — usually within 7-8 hours.