Airtac SDA Ultra Thin Cylinder SDA40X25
The AirTAC Airtac SDA Ultra Thin Cylinder SDA40X25 is a genuine double-acting COMPACT (thin) air cylinder with a Ø40mm bore and 25mm stroke, PT1/8 air ports and a riveted short body that saves mounting depth. Sensor slots around the body accept magnetic switches for position sensing.
- BoreØ40 mm
- Stroke25 mm
- Port sizePT1/8
- Acting typeDouble acting
- Rod threadM8×1.25 (F) / M14×1.5 (B)
- CushionFixed NBR bumper (both ends)
- No minimum order. A single piece can be ordered.
- Ready in 3–5 business days. That is the time we take to process the order and hand it to the carrier. Transit time after that depends on the destination.
About the Airtac SDA Ultra Thin Cylinder SDA40X25
The AirTAC SDA40X25 is a double-acting single-rod compact cylinder delivering 628.3 N of push force and 527.8 N of pull force at 0.5 MPa. Its riveted assembly merges the barrel, rear cover, piston, and 16 mm rod into a highly abbreviated package, drastically reducing axial mounting depth compared to standard round-body units. This space efficiency makes it ideal for machinery where footprint constraints are strict.
The bore features a hard-anodized inner wall and a two-way piston seal for low friction. End-of-travel deceleration is handled by a fixed NBR bumper rather than an adjustable air cushion, meaning operators cannot tune the end-stop impact. Because this specific SKU lacks the -S magnet option, it cannot host AirTAC reed or electronic switches for position sensing.
Airtac SDA Ultra Thin Cylinder SDA40X25 Technical Specifications
| Model | Airtac SDA Ultra Thin Cylinder SDA40X25 |
|---|---|
| Series | SDA compact (thin) cylinder |
| Bore size | Ø40 mm |
| Stroke | 25 mm |
| Acting type | Double acting |
| Port size | PT1/8 |
| Rod end thread | M8×1.25 female / M14×1.5 male (B) |
| Fluid | Air (filtered by 40µm element) |
|---|---|
| Operating pressure | 0.15 – 1.0 MPa |
| Proof pressure | 1.5 MPa |
| Temperature | -20 to +70 °C |
| Speed range | 30 – 500 mm/s |
| Cushion | Fixed NBR bumper (both ends) |
| Max standard stroke | Up to 120 mm |
Specifications follow the official AirTAC SDA compact-cylinder datasheet. Confirm against the product label before installation. Port thread: PT (standard). Rod: female thread (blank) / male thread (B).
Theoretical Output Force (Ø40mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 628 N | 528 N |
| 0.7 MPa | 880 N | — |
| Max (@1.0 MPa) | 128 kgf | |
Actual usable force is lower than theoretical due to friction and back-pressure. Size with a safety margin.
Model Code: Airtac SDA Ultra Thin Cylinder SDA40X25
| SDA | Compact (thin) double-acting cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×25 | Stroke length in mm. |
| S | Built-in magnet for magnetic-switch position sensing (omit = no magnet). |
| B | Male-thread piston rod (omit = female-thread rod). |
Thread: PT standard. Related SDA-family variants: SSA (single-acting push), STA (single-acting pull), SDAD (double rod), SDAJ (adjustable stroke), SDAT (duplex), SDAW (duplex-end).
Where the Airtac SDA Ultra Thin Cylinder SDA40X25 Is Used
PCB Drill Press Indexing
Provides the 628.3 N extend force needed to position PCB panels under a drill head, utilizing the short 25 mm stroke to minimize Z-axis height.
Carton Flap Folding
Drives a mechanical arm to tuck corrugated box flaps prior to sealing tape application, where the fixed NBR bumper safely absorbs the rapid end-stop impact.
Stamping Pin Ejection
Ejects small stamped metal pins from a die bed using its 16 mm rod, taking advantage of the compact riveted body to fit within tight press tooling.
Is the Airtac SDA Ultra Thin Cylinder SDA40X25 the Right Cylinder?
When sizing this 40 mm bore actuator, evaluate your neighbours: stepping down to the SDA32 yields 402.1 N of push at 0.5 MPa, while stepping up to the SDA50 provides 981.7 N. At 0.5 MPa, this model offers a safe working load around 377 N (roughly 60 percent of its rated output), translating to a vertical lift capacity of about 32 kg with a 2:1 safety margin. Keep in mind that a standard compact cylinder will drift and cannot hold a load if air pressure drops or the valve is centred; maintaining vertical loads without live pressure requires an external rod lock or pilot-operated check valve.
To order correctly, confirm the 40 mm bore, 25 mm stroke, PT1/8 port, and the default female M8x1.25 rod-end thread. If your application requires male threading, specify the B option, and add an S suffix if you need magnetic sensing capabilities.
Quick checklist
- ✓ Required force at your working pressure
- ✓ Short-body depth vs. a round-body cylinder
- ✓ Port/thread type (PT)
- ✓ Magnet (S) for sensors?
- ✓ Female (blank) or male (B) rod thread
- ✓ Side load — avoid on a compact rod
Installation & Maintenance Notes
- check Use clean air filtered to 40µm or finer.
- check Keep within 0.15 – 1.0 MPa operating pressure.
- check Avoid side load on the short piston rod.
- check Very long strokes are unsuitable for the compact body.
- check Front/rear covers are riveted — do not dismantle.
- check Installation by qualified personnel per AirTAC docs.
Airtac SDA Ultra Thin Cylinder SDA40X25 FAQ
At 0.5 MPa, the push force is 628.3 N and the pull force is 527.8 N. At 0.7 MPa, push is 879.6 N and pull is 738.9 N. The theoretical maximum push is 128 kgf at 1.0 MPa. Operating pressure ranges from 0.15 to 1.0 MPa, with a speed of 30-500 mm/s.
No adjustable air cushion exists; end-stop deceleration relies solely on a fixed NBR bumper. For high kinetic energy loads, slow the approach speed or use an external shock absorber. Additionally, this SKU lacks a piston magnet, so it cannot accept reed or electronic switches unless you order the -S variant.
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1-Year Warranty
Covers non-human-caused product damage.
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Standard models are processed and dispatched in 3-5 business days.
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Most inquiries answered within 7-8 hours.
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