Airtac STA Single Acting Compact Guided Cylinder STA20X30SB
The AirTAC Airtac STA Single Acting Compact Guided Cylinder STA20X30SB is a genuine single-acting COMPACT cylinder (single acting, pull type) with a Ø20mm 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.
- BoreØ20 mm
- Stroke30 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 STA20X30SB
The AirTAC STA20X30SB is a compact single-acting pull-type cylinder where air retracts the rod and an internal spring extends it. It yields 108.9 N of net pull at 0.5 MPa, making it ideal for tensioning tasks. The short riveted body saves axial mounting depth where round-body alternatives will not fit.
This 20 mm bore variant features a 30 mm stroke and a built-in magnet for position sensing. Because it is spring-extended, the unit fails safe to the extended position on air loss. It requires a minimum of 0.2 MPa operating pressure to overcome the return spring.
Airtac STA Single Acting Compact Guided Cylinder STA20X30SB Technical Specifications
| Model | Airtac STA Single Acting Compact Guided Cylinder STA20X30SB |
|---|---|
| Series | STA compact single-acting cylinder |
| Bore size | Ø20 mm |
| Stroke | 30 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 STA20X30SB
| STA | Compact single acting, pull type cylinder series. |
|---|---|
| 20 | 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 STA20X30SB Is Used
Tension Gate Release
Uses the 108.9 N net pull to retract a tensioned diverter gate on a conveyor line, letting the internal spring push it back open when air drops.
Carton Hold-Down
Pulls a hold-down arm out of the way to clear carton passage during packaging cycles, relying on spring extension to return the barrier.
Clamp Retraction
Withdraws a small machining clamp via the male M6x1.0 rod end, freeing the part while the spring maintains the open rest state.
Is the Airtac STA Single Acting Compact Guided Cylinder STA20X30SB the Right Cylinder?
When sizing this model, compare it both ways: the STA16 bore yields 66.4 N net pull at 0.5 MPa, while the larger STA25 bore provides 177.7 N. This 20 mm bore offers a computed safe working load of roughly 65 N, allowing a vertical lift of about 5.6 kg with a 2:1 safety margin. Note the 30 mm stroke ceiling for standard single-acting models.
This configuration includes the -S magnet for AirTAC reed or electronic switches and the -B male M6x1.0 piston rod thread (replacing the default female M4x0.7). The M5x0.8 port is fixed by the bore. Remember that the fixed NBR bumper decelerates the stroke end but does not lock the load; for mid-stroke holding without live pressure, use a double-acting SDA with an external rod lock.
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 STA20X30SB FAQ
This single-acting pull cylinder provides 108.9 N of net pull at 0.5 MPa and 161.7 N at 0.7 MPa. It requires an operating pressure of 0.2-1.0 MPa, needing at least 0.2 MPa to overcome the internal return spring.
Air pressure retracts the rod, while the internal spring extends it to the rest position. The -S code means a built-in magnet is included for detection by AirTAC reed or electronic switches.
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