
The AirTAC SDAJ32~40 Adjustable Super Slim Cylinder SDAJ40X75-30S is a genuine double-acting COMPACT cylinder (Ø40mm bore) whose extend end-position is set by an external M12×1.25 adjustment screw. You can dial the stroke anywhere from 45 to 75 mm on the machine — no shims, no part change.
The AirTAC SDAJ40X75-30S is a compact double-acting double-rod cylinder engineered for on-site extend positioning. An external M12x1.25 adjuster screw dials the forward stop down by 30 mm, yielding a usable extend range of 45 to 75 mm without swapping shims or parts.
This 40 mm bore actuator features a short riveted body that minimizes axial mounting depth in tight machinery. The -S suffix denotes a built-in piston magnet compatible with AirTAC reed or electronic switches fitted into the body grooves. End-of-travel shock relies on a fixed NBR bumper, meaning it decelerates the stroke but is not an adjustable air cushion.
| Model | Airtac SDAJ32~40 Adjustable Super Slim Cylinder SDAJ40X75-30S |
|---|---|
| Series | SDAJ compact adjustable-stroke cylinder |
| Bore size | Ø40 mm |
| Max stroke | 75 mm |
| Adjustable range | 45 – 75 mm |
| Adjuster thread (R) | M12×1.25 |
| Port size | PT1/8 |
| Acting type | Double acting |
|---|---|
| Rod end thread | M8×1.25 F / M14×1.5 male (B) |
| 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) |
The adjustment screw shortens the extend stroke by up to 30 mm. SDAJ is a double-rod cylinder. Specifications follow the official AirTAC SDAJ datasheet.
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 528 N | 528 N |
| 0.7 MPa | 739 N | — |
| Max (@1.0 MPa) | 108 kgf | |
SDAJ is double-rod: the rear rod that carries the stroke adjuster passes through the rear cover, so both piston faces lose rod area. Push is shown at the annular-area value (conservative), lower than a single-rod SDA push of the same bore. Actual usable force is lower than theoretical due to friction.
| SDAJ | Compact double-acting cylinder with adjustable stroke. |
|---|---|
| 40 | Bore size in mm. |
| ×75 | Maximum stroke length in mm. |
| -30 | Adjustable window (10/20/30/40/50/75/100 mm). |
| S / B | S = magnet; B = male-thread rod (both optional). |
Thread: PT standard. Related SDA-family variants: SDA (fixed stroke), SDAD (double rod), SSA/STA (single acting), SDAT (duplex), SDAW (duplex-end).
Dial in the 45 to 75 mm extend stop during tooling changeovers to secure parts of varying widths without fabricating new spacers.
Use the built-in magnet with an electronic switch to verify the adjusted extend position for delicate trial-and-error probe placements.
Choose this specific model if your fixture requires frequent changeovers or trial positioning within the 45 to 75 mm window.
Confirm the 75 mm maximum stroke, 30 mm adjustment window, PT1/8 port, and the included magnet. The 16 mm rod uses a female M8x1.25 end thread. Remember that a plain cylinder does not hold position if air pressure drops or the valve centers; the bumper only decelerates near the end of travel. For load holding without live pressure, install an external rod lock or a pilot-operated check valve.
Quick checklist
Turning the external M12x1.25 screw shortens the extend stop anywhere between 45 and 75 mm. The integrated -S magnet works with AirTAC reed or electronic switches for position sensing, while the fixed NBR bumper decelerates the stroke end.
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