The AirTAC AirTAC SDA40X35S Compact Cylinder | 40mm Bore is a genuine double-acting COMPACT (thin) air cylinder with a Ø40mm bore and 35mm 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 SDA40X35S is a double-acting, single-rod compact cylinder engineered to deliver a push force of 628.3 N and a pull force of 527.8 N at 0.5 MPa. Its riveted assembly merges the barrel, rear cover, and piston into a highly space-efficient unit, drastically reducing axial mounting depth where a conventional round-body actuator would be too long. The 16 mm piston rod utilizes a female M8x1.25 thread as standard, providing a robust connection point for your tooling.
This specific model includes the -S option, meaning it has a built-in piston magnet for position sensing. The exterior features dedicated grooves designed to accept AirTAC magnetic reed or electronic switches, enabling precise end-of-stroke detection. Instead of an adjustable air cushion, the internal end stops rely on a fixed NBR bumper to decelerate the piston, keeping the overall length minimal while operating within the 30-500 mm/s speed range.
| Model | AirTAC SDA40X35S Compact Cylinder | 40mm Bore |
|---|---|
| Series | SDA compact (thin) cylinder |
| Bore size | Ø40 mm |
| Stroke | 35 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. |
| ×35 | 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 workpieces inside CNC machining centers, using the 628.3 N extend force to hold parts firmly against locators during high-speed milling operations.
Drives mechanical arms to tuck and fold corrugated cardboard flaps on automated packaging lines, where the short riveted body saves valuable axial space within the conveyor frame.
Acts as a depth-limiting back gauge stopper in small metal forming presses, accurately positioning sheet metal brackets before the bending cycle begins.
Selecting this 40 mm bore actuator provides a safe working load of approximately 377 N (about 60% of the 628.3 N push force at 0.5 MPa), which translates to a vertical lift capacity of roughly 32 kg with a 2:1 safety margin. If your application requires less force, stepping down to the SDA32 yields 402.1 N of push at 0.5 MPa, while heavier loads might necessitate the SDA50, which outputs 981.7 N. Keep in mind that a standard double-acting cylinder like this will drift and lose its position if air pressure drops or the valve is centered; the fixed NBR bumper only decelerates the stroke near the end and does not function as a locking brake. For applications requiring absolute load holding, an external rod lock or pilot-operated check valve must be integrated. When ordering, confirm the 35 mm stroke, PT1/8 port, female M8x1.25 rod thread, and the required -S magnet for sensor feedback.
Quick checklist
At 0.5 MPa, the push force is 628.3 N and the pull force is 527.8 N. At 0.7 MPa, the push force is 879.6 N and the pull force is 738.9 N. The theoretical maximum push force is 128 kgf at the maximum operating pressure of 1.0 MPa.
No, this actuator uses a fixed NBR bumper at each end to decelerate the piston, rather than an adjustable air cushion. Because this bumper is not field-adjustable and does not act as a brake, high-speed applications may require an external shock absorber or slowing the approach speed.
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