Airtac SDAJ32~40 Adjustable Super Slim Cylinder SDAJ40X75-20B
The AirTAC Airtac SDAJ32~40 Adjustable Super Slim Cylinder SDAJ40X75-20B 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 55 to 75 mm on the machine — no shims, no part change.
- BoreØ40 mm
- Max stroke75 mm
- Adjustable range55–75 mm
- Adjuster threadM12×1.25
- Port sizePT1/8
- CushionFixed NBR bumper (both ends)
- No minimum order. A single piece can be ordered.
- Ready in 3–5 business days. That is the time we take to process the order and hand it to the carrier. Transit time after that depends on the destination.
About the Airtac SDAJ32~40 Adjustable Super Slim Cylinder SDAJ40X75-20B
The AirTAC SDAJ40X75-20B is a compact double-acting single-rod cylinder featuring an external adjustable extend stop. By turning the R (M12x1.25) screw, you can dial the forward end-position anywhere between 55 and 75 mm directly on your machine, eliminating the need for shims or part swaps. Because the adjuster only sets the mechanical stop and not the piston area, output force remains identical to a standard SDA of this bore, delivering about 628.3 N of push at 0.5 MPa.
This variant features a male-thread M14x1.5 piston rod for secure tool mounting and a PT1/8 port. The short riveted body saves valuable axial mounting depth where larger profile cylinders cannot fit. End-of-stroke deceleration is handled by a fixed NBR bumper, which absorbs shock but is not an adjustable air cushion. Note that this specific SKU lacks a piston magnet, so it cannot support reed or electronic switches.
Airtac SDAJ32~40 Adjustable Super Slim Cylinder SDAJ40X75-20B Technical Specifications
| Model | Airtac SDAJ32~40 Adjustable Super Slim Cylinder SDAJ40X75-20B |
|---|---|
| Series | SDAJ compact adjustable-stroke cylinder |
| Bore size | Ø40 mm |
| Max stroke | 75 mm |
| Adjustable range | 55 – 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 20 mm. Force is unchanged from a standard SDA of the same bore. Specifications follow the official AirTAC SDAJ datasheet.
Theoretical Output Force (Ø40mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 628 N | 528 N |
| 0.7 MPa | 880 N | — |
| Max (@1.0 MPa) | 128 kgf | |
Force matches a standard SDA of the same bore; the adjuster only sets the stop position, not the area. Actual usable force is lower than theoretical due to friction.
Model Code: Airtac SDAJ32~40 Adjustable Super Slim Cylinder SDAJ40X75-20B
| SDAJ | Compact double-acting cylinder with adjustable stroke. |
|---|---|
| 40 | Bore size in mm. |
| ×75 | Maximum stroke length in mm. |
| -20 | 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).
Where the Airtac SDAJ32~40 Adjustable Super Slim Cylinder SDAJ40X75-20B Is Used
Machining Clamp Tuning
Dial in the 55-75 mm extend stop on the R screw to accommodate different fixture heights during CNC changeovers without machining new spacers.
Variable Depth Sealing
Adjust the forward stroke on the packaging line to press cartons of varying depths, using the 628.3 N push force to secure flaps reliably.
Vertical Lift Stops
Lift loads up to 32 kg safely with a 2:1 margin, tweaking the mechanical stop to prevent over-travel in tight vertical lifting stations.
Is the Airtac SDAJ32~40 Adjustable Super Slim Cylinder SDAJ40X75-20B the Right Cylinder?
When sizing this 40 mm bore, compare its 628.3 N push at 0.5 MPa against adjacent options. Stepping down to an SDAJ32 yields 402.1 N, which may be insufficient for heavier tooling, while stepping up to an SDAJ50 provides 981.7 N for high-mass payloads. Based on the 0.5 MPa figure, a safe working load is approximately 377 N (60 percent capacity), translating to a vertical lift capability of roughly 32 kg with a 2:1 safety margin.
This model is ideal for setups requiring frequent on-site stroke tuning or changeovers. Confirm your requirements for a 75 mm maximum stroke, 20 mm adjustment window, PT1/8 port, and the male M14x1.5 rod thread. Remember that a plain cylinder does not hold position on air loss or valve centering; the bumper only decelerates near the end. For load holding without live pressure, integrate an external rod lock or pilot-operated check valve.
Quick checklist
- ✓ Need on-machine stroke fine-tuning?
- ✓ Target position within 55–75 mm
- ✓ Force at your working pressure
- ✓ Access to reach the R adjuster
- ✓ Magnet (S) for sensors?
Installation & Maintenance Notes
- check Use clean air filtered to 40µm or finer.
- check Keep within 0.15 – 1.0 MPa operating pressure.
- check Lock the M12×1.25 adjuster after setting the stroke.
- check Avoid side load on the piston rod.
- check Front/rear covers are riveted — do not dismantle.
- check Installation by qualified personnel per AirTAC docs.
Airtac SDAJ32~40 Adjustable Super Slim Cylinder SDAJ40X75-20B FAQ
This 40 mm bore cylinder features a PT1/8 port and generates 628.3 N push / 527.8 N pull at 0.5 MPa, and 879.6 N push / 738.9 N pull at 0.7 MPa. The theoretical maximum push force is 128 kgf at 1.0 MPa.
The M12x1.25 adjuster screw mechanically shortens the extend stroke by up to 20 mm, allowing you to set the end position anywhere between 55 and 75 mm. This specific SKU does not have a piston magnet, so it cannot accept reed or electronic switches; you would need the -S variant for sensing.
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