The AirTAC AirTAC SDA40X40S Compact Cylinder | 40mm Bore is a genuine double-acting COMPACT (thin) air cylinder with a Ø40mm bore and 40mm 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 SDA40X40S 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 where standard profile or round-body actuators cannot fit. The bore is hard-anodized and uses a two-way piston seal for reliable operation.
Because this model includes the S option, it contains a built-in piston magnet for position sensing via AirTAC reed or electronic switches mounted in the body grooves. End-stopping relies on a fixed NBR bumper rather than an adjustable air cushion, meaning it absorbs impact but cannot be field-tuned for high-energy cycles. The 16 mm rod and PT1/8 port are set by the 40 mm bore, and the female M8x1.25 rod end threads couple directly to your load.
| Model | AirTAC SDA40X40S Compact Cylinder | 40mm Bore |
|---|---|
| Series | SDA compact (thin) cylinder |
| Bore size | Ø40 mm |
| Stroke | 40 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. |
| ×40 | 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).
Drives the Z-axis plunge on a printed circuit board depaneling router, utilizing the 628.3 N push force to cleanly mill separation tabs within a tight machinery footprint.
Actuates the side folding arms on a continuous motion case erector, where the 40 mm stroke rapidly tucks flaps prior to adhesive application.
Kicks small aluminum brackets out of a progressive die set, using the fixed NBR bumper to absorb the sudden end-of-stroke impact without requiring external cushions.
When sizing this 40 mm bore actuator, evaluate your neighbors: 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. For the SDA40X40S, the 628.3 N output at 0.5 MPa translates to a safe working load around 377 N (60 percent capacity) or a vertical lift of roughly 32 kg with a 2:1 safety margin. Confirm your ordering essentials: 40 mm bore, 40 mm stroke, PT1/8 port, S magnet, and female rod thread.
Remember that a basic compact cylinder cannot hold a load if air pressure drops or the directional valve centers. The piston will drift, and the fixed NBR bumper only decelerates the stroke end without acting as a lock. If your fixture must maintain position without live pressure, install an external rod lock or a pilot-operated check valve.
Quick checklist
At 0.5 MPa this actuator generates 628.3 N of push and 527.8 N of pull. At 0.7 MPa the push increases to 879.6 N. The theoretical maximum push is 128 kgf at the 1.0 MPa operating pressure limit.
No. This cylinder uses a fixed NBR bumper at each end to decelerate the piston, which is not an adjustable air cushion. Additionally, it does not feature a locking mechanism; if air is lost, the piston will drift. Use an external rod lock for position holding.
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