Airtac STA Single Acting Compact Guided Cylinder STA20X5SB
The AirTAC Airtac STA Single Acting Compact Guided Cylinder STA20X5SB 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 STA20X5SB
The AirTAC STA20X5SB 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, safely handling a working load of roughly 65 N or vertically lifting about 5.6 kg with a 2:1 margin. This 5 mm stroke unit is normally extended at rest and fails safely to that extended position upon air loss.
The short riveted body saves axial mounting depth where round-body or profile cylinders cannot fit. Equipped with a built-in piston magnet for AirTAC reed or electronic switches and a male M6x1.0 piston rod thread, it uses a fixed NBR bumper to decelerate the stroke end rather than an adjustable cushion.
Airtac STA Single Acting Compact Guided Cylinder STA20X5SB Technical Specifications
| Model | Airtac STA Single Acting Compact Guided Cylinder STA20X5SB |
|---|---|
| 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 STA20X5SB
| 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 STA20X5SB Is Used
Tension Pull-Back Jig
Uses the 108.9 N net pull to retract a clamping arm on cue, letting the internal spring push it clear when air drops.
Gate Return Mechanism
Holds a diverter gate open via the 5 mm stroke, snapping it back to the closed extended state during an air loss.
Film Hold-Down
Pulls a 5 mm pin to release packaging film tension, relying on the male M6x1.0 rod end for a secure tooling mount.
Is the Airtac STA Single Acting Compact Guided Cylinder STA20X5SB the Right Cylinder?
When sizing this 20 mm bore, compare its 108.9 N net pull at 0.5 MPa against the adjacent bores. Stepping down, the STA16 yields 66.4 N; stepping up, the STA25 provides 177.7 N. This model requires 0.2 to 1.0 MPa operating pressure to overcome the spring, and respects the 30 mm maximum standard stroke ceiling.
Because the spring drives the rod out when air is released, the STA20X5SB does not hold a mid-stroke load without live pressure. For a held mid-stroke load, use a double-acting SDA with an external rod lock. This specific configuration includes the -S magnet for position sensing and the -B male M6x1.0 rod thread, paired with an M5x0.8 air port.
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 STA20X5SB FAQ
It delivers 108.9 N net pull at 0.5 MPa and 161.7 N at 0.7 MPa. The operating pressure range is 0.2-1.0 MPa, as at least 0.2 MPa is needed to overcome the internal return spring.
No, the spring extends the rod to its rest position when air is released, so it cannot hold a mid-stroke load. The -S magnet works with AirTAC reed or electronic switches to detect position, but an external rod lock is required for holding.
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