The AirTAC AirTAC SDA40X15SNH Compact Cylinder | 40mm Bore is a genuine double-acting COMPACT (thin) air cylinder with a Ø40mm bore and 15mm 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 SDA40X15SNH is a double-acting single-rod compact cylinder engineered for tight axial spaces. It delivers a robust 628.3 N push force at 0.5 MPa (879.6 N at 0.7 MPa) across a precise 15 mm stroke. The riveted body assembly significantly reduces overall mounting depth compared to round-body alternatives, making it highly effective for dense machinery layouts. A hard-anodized bore and two-way piston seal ensure durable, low-friction operation.
This specific configuration includes a built-in piston magnet (-S) for position sensing via AirTAC reed or electronic switches fitted into the body grooves. It also features fluororubber (FKM) seals (-H) for enhanced thermal and oil resistance. End-of-stroke deceleration is handled by a fixed NBR bumper rather than an adjustable air cushion. The 16 mm piston rod utilizes a female M8x1.25 thread, and air connections use a PT1/8 port.
| Model | AirTAC SDA40X15SNH Compact Cylinder | 40mm Bore |
|---|---|
| Series | SDA compact (thin) cylinder |
| Bore size | Ø40 mm |
| Stroke | 15 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. |
| ×15 | 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).
Actuates short-stroke tool release mechanisms on machining centers where the FKM seals withstand elevated ambient heat and lubricant mist.
Provides a consistent 628.3 N clamping force for heat-sealing jaws, utilizing the compact riveted body to minimize axial footprint in tight packaging lines.
Drives a short 15 mm diverter gate to eject molded components, relying on the built-in magnet to trigger electronic switches for cycle counting.
When sizing this 40 mm bore actuator, consider stepping down to the SDA32, which provides 402.1 N of push force at 0.5 MPa, or moving up to the SDA50, which yields 981.7 N at the same pressure. For the SDA40X15SNH specifically, the theoretical safe working load is approximately 377 N (about 60% of the 0.5 MPa output), translating to a vertical lift capacity of roughly 32 kg with a 2:1 safety margin. Keep in mind that a standard double-acting cylinder drifts when air pressure is lost or the valve is centered; the fixed bumper only decelerates the piston near stroke end and does not function as a locking brake. If your application requires absolute position holding without live pressure, you must integrate an external rod lock or a pilot-operated check valve. To finalize your order, confirm the 40 mm bore, 15 mm stroke, PT1/8 port, female rod thread, magnet, and FKM seal requirements.
Quick checklist
This 40 mm bore double-acting 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 force is 128 kgf at 1.0 MPa. It operates between 0.15 and 1.0 MPa, handles a proof pressure of 1.5 MPa, and functions in temperatures from -20 to +70 C.
No, the SDA series uses a fixed NBR bumper at each end to decelerate the piston near the stroke limits; it is not an adjustable air cushion. For high-speed or high-energy cycles, you should slow the approach speed or install an external shock absorber. Additionally, this bumper does not lock the rod, so an external rod lock is required to hold a load if air pressure drops.
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