Airtac STA Single Acting Compact Guided Cylinder STA40X15S
The AirTAC Airtac STA Single Acting Compact Guided Cylinder STA40X15S is a genuine single-acting COMPACT cylinder (single acting, pull type) with a Ø40mm 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.
- BoreØ40 mm
- Stroke15 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 STA40X15S
The AirTAC STA40X15S is a compact single-acting pull-type cylinder where compressed air retracts the 16 mm rod and an internal spring pushes it back out. It generates 445.1 N of net pull at 0.5 MPa, safely handling a working load of roughly 267 N or lifting about 22.7 kg vertically with a 2:1 margin. The short riveted body drastically reduces axial mounting depth compared to standard round-body options.
Because the spring performs the extension stroke, only one PT1/8 air line and a single solenoid port are required for operation. This specific model includes a built-in piston magnet, allowing position detection via AirTAC reed or electronic switches mounted in the body sensor grooves. Impact at the stroke ends is managed by a fixed NBR bumper, which decelerates the piston without adding adjustable cushioning.
Airtac STA Single Acting Compact Guided Cylinder STA40X15S Technical Specifications
| Model | Airtac STA Single Acting Compact Guided Cylinder STA40X15S |
|---|---|
| Series | STA compact single-acting cylinder |
| Bore size | Ø40 mm |
| Stroke | 15 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 STA40X15S
| STA | Compact single acting, pull type cylinder series. |
|---|---|
| 40 | 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 STA40X15S Is Used
Tensioning Systems
Uses the 445.1 N net pull to draw tension cables or belts tight, with the internal spring automatically slacking the line when air pressure drops.
Gate Diversion
Pulls a sorting deflector plate out of the lane during active transit, letting the fixed NBR bumper absorb the 15 mm stroke impact.
Hold-Down Clamps
Draws a clamping arm inward against packaging, utilizing the 16 mm rod to secure items before the spring releases them outward.
Is the Airtac STA Single Acting Compact Guided Cylinder STA40X15S the Right Cylinder?
When sizing this 40 mm bore unit, verify the 445.1 N net pull at 0.5 MPa is sufficient for your tensioning or return-to-open task. If you need less force, stepping down to the STA32 provides 290.1 N, while moving up to the STA50 yields 717.7 N at the same pressure. Keep in mind the single-acting spring-extend design means the rod drives outward to its rest position upon air loss; it will not hold a mid-stroke load without an external locking device.
Confirm the 15 mm stroke falls within the 30 mm maximum standard limit for this series. This configuration includes the S option for a magnetic piston and uses a female M8x1.25 rod-end thread. Operating pressure must be at least 0.2 MPa to overcome the internal return spring, with a maximum allowable pressure of 1.0 MPa.
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 STA40X15S FAQ
This single-acting pull-type cylinder provides a net pull force of 445.1 N at 0.5 MPa and 656.2 N at 0.7 MPa. These figures already account for the internal spring resistance, meaning air only retracts the rod.
No, the internal spring drives the rod to its fully extended rest position when air is released, so it cannot hold a mid-stroke load. Additionally, a minimum operating pressure of 0.2 MPa is required to overcome the spring and initiate the retraction stroke.
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