Airtac STA Single Acting Compact Guided Cylinder STA20X10S
The AirTAC Airtac STA Single Acting Compact Guided Cylinder STA20X10S is a genuine single-acting COMPACT cylinder (single acting, pull type) with a Ø20mm bore and 10mm 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
- Stroke10 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 STA20X10S
The AirTAC STA20X10S is a compact single-acting pull-type cylinder where compressed air retracts the 8 mm rod and an internal spring pushes it back out. It provides 108.9 N of net pull at 0.5 MPa, making it suitable for light tensioning and return-to-open tasks. The short riveted body saves axial mounting depth where a standard round-body cylinder will not fit.
Because it is spring-extended, the unit fails safe to the extended position on air loss and requires at least 0.2 MPa to overcome the spring. The included -S magnet enables position detection with AirTAC reed or electronic switches mounted in the body grooves. End-of-stroke deceleration is handled by a fixed NBR bumper, not an adjustable cushion.
Airtac STA Single Acting Compact Guided Cylinder STA20X10S Technical Specifications
| Model | Airtac STA Single Acting Compact Guided Cylinder STA20X10S |
|---|---|
| Series | STA compact single-acting cylinder |
| Bore size | Ø20 mm |
| Stroke | 10 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 STA20X10S
| STA | Compact single acting, pull type cylinder series. |
|---|---|
| 20 | Bore size in mm. |
| ×10 | 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 STA20X10S Is Used
Gate Return Mechanism
Uses the spring-extend function to push a diverter gate open, with the 108.9 N air pull retracting it to sort packages on a conveyor line.
Film Tensioning Arm
Maintains steady tension on packaging material by pulling the arm in during the cycle, relying on the internal spring to feed it back out.
Clamp Release Actuator
Pulls back a small holding clamp in a machining fixture when air is applied, allowing the spring to seat the clamp against the part at rest.
Is the Airtac STA Single Acting Compact Guided Cylinder STA20X10S the Right Cylinder?
When sizing this 20 mm bore, compare its 108.9 N net pull at 0.5 MPa against the neighboring bores: stepping down to STA16 yields 66.4 N, while stepping up to STA25 provides 177.7 N. This model has a 10 mm stroke, well under the 30 mm single-acting ceiling, and uses an M5x0.8 port with a female M4x0.7 rod-end thread.
Remember the spring drives the rod out when air is released, so it cannot hold a mid-stroke load without live pressure. For a safe working load, figure roughly 65 N, which allows a 2:1 margin and translates to a vertical lift capacity of about 5.6 kg. Confirm your bore, stroke, port, and required -S 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 STA20X10S FAQ
This model provides a net pull force of 108.9 N at 0.5 MPa and 161.7 N at 0.7 MPa. These figures already account for the force lost to the internal return spring.
No, the internal spring drives the rod to the extended position when air is released, so it cannot hold a mid-stroke load. It also requires a minimum of 0.2 MPa operating pressure to overcome the spring and retract the rod.
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