The AirTAC AirTAC SDA40X25N Compact Cylinder | 40mm Bore 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.
The AirTAC SDA40X25N is a double-acting single-rod compact cylinder engineered to deliver 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 rod into a highly shortened unit, drastically reducing axial mounting depth compared to conventional round-body designs. This space efficiency makes it ideal for machinery where tightening the footprint is critical.
This specific configuration features a 16 mm piston rod and PT1/8 air ports. The bore interior is hard-anodized for durability, and end-of-travel deceleration is handled by a fixed NBR bumper rather than an adjustable air cushion. Note that this SKU lacks a piston magnet, so it cannot support magnetic position sensing without upgrading to an -S variant.
| Model | AirTAC SDA40X25N Compact Cylinder | 40mm Bore |
|---|---|
| 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).
| 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.
| 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).
Secures aluminum housings onto machining centers. The 628.3 N extend force holds parts firmly against the table while the short 25 mm stroke keeps the fixture profile extremely low.
Drives mechanical arms to tuck cardboard flaps on automated packaging lines. Its compact riveted body fits neatly within tight side-frame clearances where longer actuators would collide.
Pushes lightweight parcels onto secondary routing tracks. The fixed NBR bumper absorbs the end-stop impact reliably across the 30-500 mm/s operational speed range.
When sizing this actuator, evaluate your force requirements carefully. Stepping down to the SDA32 bore provides 402.1 N of push at 0.5 MPa, while stepping up to the SDA50 yields 981.7 N at the same pressure. Based on the 628.3 N output, a safe working load is approximately 377 N (60% capacity), translating to a vertical lift capability of about 32 kg with a 2:1 safety margin.
Remember that a standard double-acting cylinder drifts when air pressure is lost or the valve is centered, as the fixed bumper only slows the piston near stroke end and acts as neither a lock nor a brake. To hold a load securely without live pressure, you must integrate an external rod lock or a pilot-operated check valve. To order, confirm the 40 mm bore, 25 mm stroke, PT1/8 port, female M8x1.25 rod-end thread, and no magnet.
Quick checklist
This double-acting 40 mm bore cylinder generates 628.3 N push and 527.8 N pull at 0.5 MPa. At 0.7 MPa, it yields 879.6 N push and 738.9 N pull. The theoretical maximum push is 128 kgf at 1.0 MPa. It operates between 0.15 and 1.0 MPa, with a proof pressure of 1.5 MPa, and supports speeds of 30-500 mm/s.
No, this specific SKU does not include a piston magnet, meaning it cannot trigger reed or electronic switches. If position sensing is required, you must select the -S option code. Additionally, end-stop deceleration relies on a fixed NBR bumper, which is not field-adjustable; for high-energy cycles, slow the approach or add an external shock absorber.
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