Airtac STA Single Acting Compact Guided Cylinder STA40X25B
The AirTAC Airtac STA Single Acting Compact Guided Cylinder STA40X25B is a genuine single-acting COMPACT cylinder (single acting, pull type) with a Ø40mm bore and 25mm 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
- Stroke25 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 STA40X25B
The AirTAC STA40X25B is a compact single-acting pull-type cylinder where compressed air retracts the rod and an internal spring pushes it back out. It yields 445.1 N of net pull at 0.5 MPa, with the spring force already subtracted from the pneumatic effort. Because the spring drives the extension stroke, the actuator fails safely to the extended position if air pressure drops.
This thin riveted body minimizes axial mounting depth in tight machinery spaces. The unit relies on a fixed NBR bumper to decelerate the stroke end rather than an adjustable air cushion. Equipped with the B option, it features a male M14x1.5 piston rod thread for direct load attachment.
Airtac STA Single Acting Compact Guided Cylinder STA40X25B Technical Specifications
| Model | Airtac STA Single Acting Compact Guided Cylinder STA40X25B |
|---|---|
| Series | STA compact single-acting cylinder |
| Bore size | Ø40 mm |
| Stroke | 25 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 STA40X25B
| STA | Compact single acting, pull type cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×25 | 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 STA40X25B Is Used
Tension Gate Closure
Uses the 445.1 N net pull to draw a conveyor diverter gate inward, allowing the internal spring to push it back open when air is vented.
Film Roll Hold-Down
Pulls a packaging film tensioning arm securely into position via the male M14x1.5 rod, releasing tension instantly upon air loss.
Short-Stroke Clamping
Retracts a 25 mm clamping pin to release finished parts, relying on the spring to extend the pin and maintain grip during machining.
Is the Airtac STA Single Acting Compact Guided Cylinder STA40X25B the Right Cylinder?
Sizing this actuator requires comparing the net pulling force against adjacent bores. Dropping down to the STA32 provides 290.1 N at 0.5 MPa, whereas stepping up to the STA50 yields 717.7 N, making the 445.1 N output of this 40 mm bore a solid middle ground. A safe working load is approximately 267 N, offering a 2:1 margin that equates to a vertical lift capacity of about 22.7 kg.
The 25 mm stroke sits comfortably under the 30 mm maximum standard limit for this series. Keep in mind the spring-extend behavior means the rod will not hold a mid-stroke load without live air pressure. This specific SKU lacks the S magnet option, meaning it cannot accept reed or electronic switches, and it carries the B code for the male M14x1.5 rod thread alongside its PT1/8 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 STA40X25B FAQ
This model 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 return spring resistance.
No, this specific SKU does not include the S option for a piston magnet, so it cannot accept reed or electronic switches. You would need the -S variant for position sensing.
Authorized Export Seller
Genuine AirTAC parts produced by AirTAC factory.
1-Year Warranty
Covers non-human-caused product damage.
Fast Dispatch
Standard models usually ship in 3-4 days.
Fast Reply
Most inquiries answered within 7-8 hours.
Related AirTAC STA Cylinders
Request a Quote for Airtac STA Single Acting Compact Guided Cylinder STA40X25B
Send us the quantity and destination. We confirm price, stock and lead time — usually within 7-8 hours.