Airtac STA Single Acting Compact Guided Cylinder STA40X5
The AirTAC Airtac STA Single Acting Compact Guided Cylinder STA40X5 is a genuine single-acting COMPACT cylinder (single acting, pull type) with a Ø40mm 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.
- BoreØ40 mm
- Stroke5 mm
- Port sizePT1/8
- Acting typeSingle acting, pull type
- Rod threadM8×1.25 (F) / M14×1.5 (B)
- CushionFixed NBR bumper
About the Airtac STA Single Acting Compact Guided Cylinder STA40X5
The AirTAC STA40X5 is a compact single-acting pull-type cylinder where compressed air retracts the rod and an internal spring pushes it back out. It generates 445.1 N of net pull at 0.5 MPa, making it well-suited for short-stroke tensioning and clamping tasks. Because it is normally extended at rest, the mechanism safely fails to its outward position upon air loss.
This model features a short riveted body that minimizes axial mounting depth in tight machinery envelopes. The 16 mm piston rod utilizes a fixed NBR bumper to decelerate the stroke end, rather than an adjustable air cushion. It requires an operating pressure of 0.2 to 1.0 MPa to function properly, needing at least 0.2 MPa simply to overcome the return spring.
Airtac STA Single Acting Compact Guided Cylinder STA40X5 Technical Specifications
| Model | Airtac STA Single Acting Compact Guided Cylinder STA40X5 |
|---|---|
| Series | STA compact single-acting cylinder |
| Bore size | Ø40 mm |
| Stroke | 5 mm |
| Acting type | Single acting, pull type |
| Port size | PT1/8 |
| Rod end thread | M8×1.25 female / M14×1.5 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 (Ø40mm, Pull)
| Pressure | Pull force (net) |
|---|---|
| 0.5 MPa | 445 N |
| 0.7 MPa | 656 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 STA40X5
| STA | Compact single acting, pull type cylinder series. |
|---|---|
| 40 | 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 STA40X5 Is Used
Film Web Tensioning
Uses the 445.1 N net pull to maintain consistent tension on packaging film webs, with the spring extending the rod to release slack during stoppages.
Pneumatic Hold-Down Clamp
Pulls a mechanical clamp down onto a workpiece using the 5 mm stroke, relying on the internal spring to lift the arm safely when air is removed.
Diverter Gate Return
Air retracts the rod to pull a sorting gate closed on a conveyor line, while the spring automatically extends the gate to an open rest position.
Is the Airtac STA Single Acting Compact Guided Cylinder STA40X5 the Right Cylinder?
When sizing this 40 mm bore actuator, compare its 445.1 N net pull at 0.5 MPa against adjacent bores. Stepping down to the STA32 yields 290.1 N, while moving up to the STA50 provides 717.7 N. Based on the 445.1 N figure, a safe working load is roughly 267 N for a 2:1 margin, translating to a vertical lift capacity of about 22.7 kg.
This specific configuration has a 5 mm stroke, well under the 30 mm series ceiling, and uses a PT1/8 port. It lacks the -S magnet option, meaning it cannot accept AirTAC reed or electronic switches. The rod end features a female M8x1.25 thread, and because the spring drives the rod out when air is released, it cannot hold a mid-stroke load without an external locking device.
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 STA40X5 FAQ
The STA40X5 provides a net pull force of 445.1 N at 0.5 MPa and 656.2 N at 0.7 MPa. It requires an operating pressure between 0.2 and 1.0 MPa, with a minimum of 0.2 MPa necessary to overcome the internal return spring.
No, this specific SKU does not include the -S option, so it lacks a piston magnet and cannot accept AirTAC reed or electronic switches. You would need the -S variant to utilize the body sensor grooves for position detection.
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