Airtac SDAJ32~40 Adjustable Super Slim Cylinder SDAJ40X55-20SB
The AirTAC Airtac SDAJ32~40 Adjustable Super Slim Cylinder SDAJ40X55-20SB 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 35 to 55 mm on the machine — no shims, no part change.
- BoreØ40 mm
- Max stroke55 mm
- Adjustable range35–55 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 SDAJ40X55-20SB
The AirTAC SDAJ40X55-20SB is a double-acting compact cylinder featuring an external adjustable extend stop. By turning the R (M12x1.25) screw, you can dial the forward stroke on the machine from 35 to 55 mm without shims or part changes. Because the adjuster sets the mechanical stop rather than the piston area, output force remains identical to a standard SDA of this bore, delivering 628.3 N push at 0.5 MPa.
This variant includes a built-in piston magnet (-S) for AirTAC reed or electronic switches and a male-thread piston rod (-B, M14x1.5). The short riveted body saves axial mounting depth where round-body or profile cylinders will not fit. End shock is handled by a fixed NBR bumper that decelerates the stroke, which is not an adjustable air cushion.
Airtac SDAJ32~40 Adjustable Super Slim Cylinder SDAJ40X55-20SB Technical Specifications
| Model | Airtac SDAJ32~40 Adjustable Super Slim Cylinder SDAJ40X55-20SB |
|---|---|
| Series | SDAJ compact adjustable-stroke cylinder |
| Bore size | Ø40 mm |
| Max stroke | 55 mm |
| Adjustable range | 35 – 55 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 SDAJ40X55-20SB
| SDAJ | Compact double-acting cylinder with adjustable stroke. |
|---|---|
| 40 | Bore size in mm. |
| ×55 | 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 SDAJ40X55-20SB Is Used
Machine Tending Setup
Dial the extend stop from 35 to 55 mm on the R screw to perfect the gripper reach during initial commissioning without machining new spacers.
Carton Forming Changeover
Quickly adjust the 628.3 N push stroke for different box sizes on a packaging line, relying on the fixed NBR bumper to absorb end shock.
Vertical Lift Positioning
Lift a 32 kg payload with a 2:1 safety margin and fine-tune the exact raise height using the M12x1.25 adjuster screw.
Is the Airtac SDAJ32~40 Adjustable Super Slim Cylinder SDAJ40X55-20SB the Right Cylinder?
When sizing this 40 mm bore, compare it both ways: stepping down to SDAJ32 yields 402.1 N push at 0.5 MPa, while stepping up to SDAJ50 provides 981.7 N. This SDAJ40X55-20SB configuration is ideal for operators needing on-site stroke tuning during frequent changeovers. Based on the 628.3 N figure, a safe working load is roughly 377 N (about 60 percent), allowing a vertical lift of approximately 32 kg with a 2:1 margin.
Confirm your requirements for a 55 mm maximum stroke with a 20 mm window, PT1/8 port, M14x1.5 male rod, and the integrated magnet. Note that a plain cylinder does not hold its load on air loss or when the valve is centered; the piston drifts and the fixed bumper only decelerates near the end. For load holding without live pressure, install an external rod lock or a pilot-operated check valve.
Quick checklist
- ✓ Need on-machine stroke fine-tuning?
- ✓ Target position within 35–55 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 SDAJ40X55-20SB FAQ
This 40 mm bore double-acting cylinder delivers 628.3 N push and 527.8 N pull at 0.5 MPa, 879.6 N push and 738.9 N pull at 0.7 MPa, with a theoretical maximum of 128 kgf at 1.0 MPa.
The R (M12x1.25) screw mechanically shortens the extend stop by up to 20 mm, giving a usable range of 35-55 mm; it does not alter force. The included -S magnet works with AirTAC reed or electronic solid-state switches for position sensing.
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Standard models are processed and dispatched in 3-5 business days.
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Most inquiries answered within 7-8 hours.
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