The AirTAC AirTAC SDA40X120 Compact Cylinder | 40mm Bore is a genuine double-acting COMPACT (thin) air cylinder with a Ø40mm bore and 120mm 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 SDA40X120 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 hard-anodized bore and two-way piston seal ensure reliable service life within a short riveted body design. This space-saving architecture drastically reduces axial mounting depth compared to traditional round-body units.
This specific configuration features a 120 mm stroke, matching the bore's maximum standard stroke limit, and a 16 mm piston rod. It relies on fixed NBR bumpers at both ends to decelerate the end stop rather than an adjustable air cushion. Because this SKU lacks the -S option, it has no internal piston magnet and cannot be used with magnetic switches.
| Model | AirTAC SDA40X120 Compact Cylinder | 40mm Bore |
|---|---|
| Series | SDA compact (thin) cylinder |
| Bore size | Ø40 mm |
| Stroke | 120 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. |
| ×120 | 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).
Pushes cartons between sorting lanes on a logistics conveyor line, utilizing the 120 mm stroke to clear adjacent belts.
Folds the minor flaps of corrugated shipping boxes prior to tape application, fitting into tight machinery profiles.
Ejects molded plastic parts from a vertical press bed, using the 628.3 N extend force to overcome mold friction.
When sizing this actuator, stepping down to the SDA32 yields 402.1 N of push force at 0.5 MPa, while stepping up to the SDA50 provides 981.7 N. For the SDA40X120, the computed safe working load is roughly 377 N (about 60% of the 628.3 N figure at 0.5 MPa), translating to a vertical lift capacity of approximately 32 kg with a 2:1 safety margin. Ensure your ordering essentials match this SKU: 40 mm bore, 120 mm stroke, PT1/8 port, female M8x1.25 rod thread, and no sensor magnet.
Keep in mind that a standard compact cylinder does not hold its position if air pressure drops or the valve is centered; the piston will drift, and the fixed bumper only decelerates the stroke near its limits. If your application requires load holding without live pressure, you must integrate an external rod lock or a pilot-operated check valve.
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 1.0 MPa.
No. This specific SKU does not include the -S piston magnet, so it cannot trigger AirTAC reed or electronic switches. You would need to select the SDA40X120S variant to enable magnetic sensing.
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