Airtac STA Single Acting Compact Guided Cylinder STA20X15SB
The AirTAC Airtac STA Single Acting Compact Guided Cylinder STA20X15SB is a genuine single-acting COMPACT cylinder (single acting, pull type) with a Ø20mm bore and 15mm 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
- Stroke15 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 STA20X15SB
The AirTAC STA20X15SB is a compact single-acting pull-type cylinder. Air pressure retracts the 8 mm rod, while an internal spring pushes it back out. It yields 108.9 N of net pull at 0.5 MPa, making it ideal for tensioning and return-to-open tasks.
This 20 mm bore unit features a short riveted body that minimizes axial mounting depth. It includes a built-in magnet for reed or electronic switches, and a male M6x1.0 piston rod thread. A fixed NBR bumper absorbs end-of-stroke shock without requiring adjustment.
Airtac STA Single Acting Compact Guided Cylinder STA20X15SB Technical Specifications
| Model | Airtac STA Single Acting Compact Guided Cylinder STA20X15SB |
|---|---|
| Series | STA compact single-acting cylinder |
| Bore size | Ø20 mm |
| Stroke | 15 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 STA20X15SB
| STA | Compact single acting, pull type cylinder series. |
|---|---|
| 20 | Bore size in mm. |
| ×15 | 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 STA20X15SB Is Used
Tensioning Mechanisms
Uses the 108.9 N net pull to draw back tension cables or belts, relying on the internal spring to release the load when air pressure drops.
Package Diverter Arm
Retracts a routing flap on a 15 mm stroke to sort items, with the spring automatically returning the gate to the open position during an air loss.
Hold-Down Clamp
Pulls a light cover or component tight against a surface using the male M6x1.0 rod, safely handling a 5.6 kg load with a 2:1 margin.
Is the Airtac STA Single Acting Compact Guided Cylinder STA20X15SB the Right Cylinder?
When sizing this model, compare its 108.9 N net pull at 0.5 MPa against adjacent bores: the STA16 provides 66.4 N, while the STA25 offers 177.7 N. This 20 mm bore hits a solid middle ground, supporting a safe working load of roughly 65 N or a 5.6 kg vertical lift with a 2:1 margin.
The 15 mm stroke sits well below the 30 mm maximum limit. Remember the spring-extend behavior: on air loss, the rod drives to its extended rest position and will not hold a mid-stroke load. This configuration includes the -S magnet and -B male M6x1.0 rod thread, operating on an M5x0.8 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 STA20X15SB FAQ
This cylinder provides a net pull 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, so you can size directly to these values.
Air pressure retracts the rod, requiring a minimum of 0.2 MPa to overcome the spring. When air is released, the spring extends the rod back out. The -S magnet allows tracking with reed or electronic switches.
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