
The AirTAC SDAJ32~40 Adjustable Super Slim Cylinder SDAJ40X75-30B 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 SDAJ40X75-30B is a compact double-acting double-rod cylinder featuring an external extend stop. An M12x1.25 adjustment screw lets you dial the outward stroke down from 75 mm to 45 mm directly on the machine, avoiding part swaps.
This variant uses a male M14x1.5 piston rod thread and a PT1/8 air port. Its short riveted body saves axial mounting depth where a longer cylinder will not fit. End shock is handled by a fixed NBR bumper, which decelerates the stroke but is not an adjustable air cushion. Note this SKU lacks a piston magnet, so it cannot host reed or electronic switches.
| Model | Airtac SDAJ32~40 Adjustable Super Slim Cylinder SDAJ40X75-30B |
|---|---|
| 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 the extend stop from 45 to 75 mm during fixture swaps to accommodate varying part heights without machining new spacers.
Adjust the downward travel precisely for a 32 kg vertical lift rig, ensuring the male M14x1.5 rod seats fully without slamming.
When sizing this 40 mm bore, look at both neighbours. Choose it when you need on-site stroke tuning between 45 and 75 mm.
Confirm the PT1/8 port, the 30 mm adjustment window, and the male M14x1.5 rod thread suit your tooling. A plain cylinder does not hold its load on air loss or valve centring; the piston drifts and the fixed bumper only decelerates near the end. For secure load holding without live pressure, install an external rod lock or a pilot-operated check valve.
Quick checklist
The theoretical maximum push is 128 kgf at 1.0 MPa.
Turning the M12x1.25 R screw shortens the extend end position by up to 30 mm, giving a usable outward range of 45 to 75 mm. The retract stroke remains full. This SKU has no piston magnet, so it cannot accept sensing switches.
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