The AirTAC AirTAC SDA40X25S 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 SDA40X25S 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 significantly reduces axial mounting depth, making it ideal for machinery where a standard round-body unit would be too long. The 16 mm piston rod utilizes a female M8x1.25 thread, while the body features a hard-anodized bore and a two-way piston seal for low-friction operation.
Because this unit includes the S option, it possesses a built-in piston magnet compatible with AirTAC reed or electronic switches fitted into the body grooves. Deceleration at the 25 mm stroke ends relies on a fixed NBR bumper rather than an adjustable air cushion, meaning operators should slow the approach speed or add an external shock absorber for high-energy loads.
| Model | AirTAC SDA40X25S 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).
Provides compact 628.3 N push force to eject plastic parts from tight mold voids where axial mounting space is severely restricted.
Handles short 25 mm strokes to push cartons between adjacent conveyor lanes using integrated solid-state magnetic switches for position feedback.
Secures delicate circuit boards during drilling or routing, utilizing the 16 mm rod to apply steady clamping without overwhelming the 527.8 N retract capacity.
When sizing this 40 mm bore actuator, consider stepping down to the SDA32, which yields 402.1 N of push at 0.5 MPa, or moving up to the SDA50, which provides 981.7 N at the same pressure. For the SDA40X25S specifically, the safe working load is approximately 377 N (about 60% of the 628.3 N figure), allowing a vertical lift of roughly 32 kg with a 2:1 safety margin. To order, confirm the 40 mm bore, 25 mm stroke, PT1/8 port, built-in magnet, and female rod-end thread.
Note that a standard compact cylinder drifts when air pressure is lost or the directional valve is centered. The fixed bumper only decelerates the piston near the stroke end and does not function as a locking brake. If your application must hold a load vertically without live pressure, integrate an external rod lock or a pilot-operated check valve.
Quick checklist
At 0.5 MPa, this 40 mm bore cylinder provides 628.3 N of push force and 527.8 N of pull force. At 0.7 MPa, push increases to 879.6 N and pull to 738.9 N. The theoretical maximum push is 128 kgf at 1.0 MPa. It operates between 0.15 and 1.0 MPa, with a proof pressure of 1.5 MPa, and supports speeds of 30-500 mm/s.
No, the SDA40X25S uses a fixed NBR bumper at each end to decelerate the piston, which is not field-adjustable like an air cushion. For high-speed or high-energy cycles, you should slow the approach speed or install an external shock absorber to prevent damage.
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