The AirTAC AirTAC SDA40X120S 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 SDA40X120S 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 is critical when machinery footprint is tightly constrained.
Equipped with a built-in piston magnet (-S), this unit supports AirTAC reed or electronic switches via body grooves for precise position detection. The 16 mm piston rod utilizes a female M8x1.25 thread, while the PT1/8 port manages air supply. Travel termination relies on a fixed NBR bumper at each end, which decelerates the piston near the stroke limits rather than acting as a lock.
| Model | AirTAC SDA40X120S 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 corrugated cartons onto secondary packaging lines using the 628.3 N extend force, fitting neatly within tight transfer station frames.
Advances tooling blocks into machining centers, where the 16 mm rod and 120 mm travel handle reliable horizontal insertion tasks.
Separates empty wooden pallets in automated warehouse infeeds, utilizing the full 120 mm stroke to push slats without excessive axial bulk.
Selecting this 40 mm bore involves balancing your force requirements: 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 of roughly 377 N (about 60% of its rated push) and can vertically lift approximately 32 kg with a 2:1 safety margin. Ensure you specify the 120 mm stroke, PT1/8 port, female rod thread, and the required magnetic sensor option when ordering.
Keep in mind that a standard SDA body does not hold its load if air pressure drops or the valve is centered; the piston will drift. The fixed NBR bumper only decelerates the stroke end and does not function as a brake. If your application requires absolute position holding without live pressure, you must integrate an external rod lock or a pilot-operated check valve.
Quick checklist
This 40 mm bore double-acting cylinder generates 628.3 N push and 527.8 N pull at 0.5 MPa, or 879.6 N push and 738.9 N pull at 0.7 MPa. The theoretical maximum push force is 128 kgf at 1.0 MPa. The operating pressure range is 0.15-1.0 MPa, with a proof pressure of 1.5 MPa.
No, it uses a fixed NBR bumper at each end to decelerate the piston near stroke completion. It is not a field-adjustable air cushion, nor does it lock the load. For high-speed or high-energy cycles, you should slow the approach speed or add an external shock absorber.
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