Airtac STA Single Acting Compact Guided Cylinder STA20X30
The AirTAC Airtac STA Single Acting Compact Guided Cylinder STA20X30 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 STA20X30
The AirTAC STA20X30 is a compact single-acting pull-type cylinder where air retracts the rod and an internal spring pushes it back out. At 0.5 MPa it yields a 108.9 N net pull, increasing to 161.7 N at 0.7 MPa. This 20 mm bore unit uses an M5x0.8 port and a 8 mm rod.
Its short riveted body saves axial mounting depth where standard round-body or profile cylinders will not fit. The stroke end is decelerated by a fixed NBR bumper rather than an adjustable air cushion. This SKU lacks the -S magnet option, so it cannot accept position switches.
Airtac STA Single Acting Compact Guided Cylinder STA20X30 Technical Specifications
| Model | Airtac STA Single Acting Compact Guided Cylinder STA20X30 |
|---|---|
| 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 STA20X30
| 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 STA20X30 Is Used
Tensioning Mechanisms
Uses the 108.9 N net pull to maintain tension on belts or filaments, safely releasing when air pressure is removed.
Hold-Down Clamps
Pulls lightweight jigs or covers into place during machining, relying on the internal spring to lift the clamp out of the way.
Gate Diverters
Actuates short-stroke routing gates on a packaging line, using the spring-extend function to default the gate to an open position.
Is the Airtac STA Single Acting Compact Guided Cylinder STA20X30 the Right Cylinder?
When sizing this 20 mm bore unit, consider the STA16 which provides 66.4 N net pull at 0.5 MPa, or step up to the STA25 offering 177.7 N at the same pressure. The 30 mm stroke represents the maximum standard travel for this series.
Operating pressure must be 0.2-1.0 MPa, as at least 0.2 MPa is required to overcome the return spring. Because the spring constantly drives the rod to the extended position, this cylinder will not hold a mid-stroke load on air loss. This base configuration features a female M4x0.7 rod-end thread and no magnet.
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 STA20X30 FAQ
The STA20X30 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 internal return spring resistance.
No, this specific SKU does not include the -S magnet code, meaning it has no piston magnet and cannot accept reed or electronic switches. You would need the -S variant for position sensing.
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