Airtac STA Single Acting Compact Guided Cylinder STA20X20SB
The AirTAC Airtac STA Single Acting Compact Guided Cylinder STA20X20SB is a genuine single-acting COMPACT cylinder (single acting, pull type) with a Ø20mm bore and 20mm 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
- Stroke20 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 STA20X20SB
The AirTAC STA20X20SB is a compact single-acting pull-type cylinder where compressed air retracts the rod and an internal spring extends it back out. It yields 108.9 N of net pull at 0.5 MPa, safely handling a working load of roughly 65 N or lifting about 5.6 kg vertically with a 2:1 margin. Because the spring performs the extension stroke, the actuator fails safely to the extended position if air pressure drops.
This unit features a short riveted body that minimizes axial mounting depth where standard round-body or profile cylinders cannot fit. Equipped with the -S option, it carries a built-in piston magnet for position sensing, while the -B option specifies a male M6x1.0 threaded rod end for direct load attachment.
Airtac STA Single Acting Compact Guided Cylinder STA20X20SB Technical Specifications
| Model | Airtac STA Single Acting Compact Guided Cylinder STA20X20SB |
|---|---|
| Series | STA compact single-acting cylinder |
| Bore size | Ø20 mm |
| Stroke | 20 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 STA20X20SB
| STA | Compact single acting, pull type cylinder series. |
|---|---|
| 20 | Bore size in mm. |
| ×20 | 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 STA20X20SB Is Used
Tension Gate Control
Uses the 108.9 N net pull to retract a diverter gate against spring pressure, automatically snapping back to the open position to clear jams when air is cut.
Film Roll Hold-Down
Pulls a clamping arm inward to secure packaging material, relying on the male M6x1.0 rod thread for a rigid fixture and the spring to release the web.
Component Return Arm
Draws a locating pin out of the way during part ejection, saving axial space with its compact riveted body while the internal spring re-seats the pin.
Is the Airtac STA Single Acting Compact Guided Cylinder STA20X20SB the Right Cylinder?
When sizing this 20 mm bore actuator, compare its 108.9 N net pull at 0.5 MPa against adjacent bores: the STA16 provides 66.4 N, and the STA25 offers 177.7 N. This model requires 0.2 to 1.0 MPa operating pressure to overcome the return spring, and the 20 mm stroke sits well below the 30 mm series maximum. Verify your need for the M5x0.8 air port, the male M6x1.0 rod thread, and the magnetic piston.
Remember that the internal spring drives the rod to its extended rest position upon air loss, meaning it cannot hold a mid-stroke load without live pressure. End-of-stroke deceleration relies on a fixed NBR bumper rather than an adjustable air cushion, so external shock absorbers are recommended for high-energy cycles.
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 STA20X20SB FAQ
This cylinder provides 108.9 N of net pull at 0.5 MPa and 161.7 N at 0.7 MPa. It requires a minimum operating pressure of 0.2 MPa to overcome the internal return spring, with a maximum limit of 1.0 MPa.
Air pressure pulls the rod inward, while the internal spring pushes it out to the extended rest position when air is released. The built-in -S magnet allows tracking with either reed or electronic solid-state switches along the body grooves.
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