The AirTAC AirTAC SDA40X90S Compact Cylinder | 40mm Bore is a genuine double-acting COMPACT (thin) air cylinder with a Ø40mm bore and 90mm 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 SDA40X90S 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. Driven by a 16 mm piston rod, it provides robust actuation within a minimal axial footprint. The riveted unibody design integrates the barrel and covers, drastically reducing overall length compared to conventional round-body units.
This specific configuration includes a built-in piston magnet (the S option) for position sensing via AirTAC reed or electronic switches mounted in the body grooves. End-of-stroke deceleration relies on a fixed NBR bumper rather than an adjustable air cushion, meaning operators should moderate approach speeds or utilize external shock absorbers for heavy kinetic loads.
| Model | AirTAC SDA40X90S Compact Cylinder | 40mm Bore |
|---|---|
| Series | SDA compact (thin) cylinder |
| Bore size | Ø40 mm |
| Stroke | 90 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. |
| ×90 | 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).
Drives the Z-axis plunge on a PCB depaneling router, utilizing the 90 mm stroke to clear tooling while the compact body minimizes gantry interference.
Folds secondary carton flaps on a continuous packaging line, using the 628.3 N push force to overcome cardboard resistance reliably.
Acts as a localized stripper plate ejector on a small injection molding machine, saving axial depth where standard ISO cylinders cannot fit.
When sizing this 40 mm bore unit, consider stepping down to the SDA32 if your application requires only 402.1 N of push at 0.5 MPa, or scaling up to the SDA50 which provides 981.7 N for heavier demands. Based on the 628.3 N output at 0.5 MPa, a safe working load is approximately 377 N (a 60% margin), translating to a vertical lift capacity of roughly 32 kg with a 2:1 safety factor. To finalize your order, confirm the 40 mm bore, 90 mm stroke, PT1/8 port, female M8x1.25 rod thread, and the required -S magnet. Note that a standard double-acting cylinder will drift if air pressure is lost; adding an external rod lock or pilot-operated check valve is necessary to hold a load securely.
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 is 879.6 N and the pull is 738.9 N. The theoretical maximum push is 128 kgf at 1.0 MPa. Operating pressure ranges from 0.15 to 1.0 MPa, with a speed of 30-500 mm/s.
No, the piston will drift if air is lost or the valve is centered. The fixed NBR bumpers only decelerate the piston near the stroke end; they do not function as a locking brake. To maintain a vertical load safely, you must install an external rod lock or a pilot-operated check valve.
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