The AirTAC AirTAC SDA40X25SB Compact Cylinder | 40mm Bore is a genuine double-acting COMPACT (thin) air cylinder with a Ø40mm bore and 25mm 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 SDA40X25SB 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 body assembly minimizes axial mounting depth, providing a distinct footprint advantage over conventional round-body units in tight machinery layouts. The unit includes a built-in piston magnet (-S) for position sensing and a male M14x1.5 threaded rod end (-B) for secure load coupling.
The 40 mm bore features a hard-anodized inner wall and operates on a 30-500 mm/s speed range via PT1/8 ports. Instead of an adjustable air cushion, the piston strikes a fixed NBR bumper at each end of the stroke. This design decelerates the moving mass near the endpoints but is not a locking mechanism; for high-energy cycles, operators should add external shock absorbers or slow the approach velocity.
| Model | AirTAC SDA40X25SB Compact Cylinder | 40mm Bore |
|---|---|
| Series | SDA compact (thin) cylinder |
| Bore size | Ø40 mm |
| Stroke | 25 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. |
| ×25 | 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 housings onto a CNC machining center using the 628.3 N extend force, while the male M14x1.5 rod threads directly into the custom jaw.
Actuates folding arms on a continuous packaging line where the short riveted body keeps the assembly within the tight conveyor side-frame clearance.
Pushes molded plastic parts out of an injection press mold, relying on the built-in magnet to trigger a reed or electronic switch for precise ejection confirmation.
Selecting this model provides a safe working load of roughly 377 N (about 60% of the 628.3 N push at 0.5 MPa), translating to a vertical lift capacity near 32 kg with a 2:1 safety margin. If your application requires less force, stepping down to the SDA32 bore yields 402.1 N at 0.5 MPa, while stepping up to the SDA50 bore provides 981.7 N at 0.5 MPa. Keep in mind that a standard double-acting cylinder drifts when air pressure is lost or the valve is centered, so an external rod lock or pilot-operated check valve is necessary to hold a load securely. When ordering, confirm the 40 mm bore, 25 mm stroke, PT1/8 port, built-in magnet, and male M14x1.5 rod thread.
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, with a proof pressure of 1.5 MPa.
It uses a fixed NBR bumper at each end to decelerate the piston, which is not an adjustable air cushion. If your cycle speeds are high, add an external shock absorber. Furthermore, the cylinder will drift and cannot hold a load on air loss or valve centering, requiring an external rod lock for position holding.
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