Airtac SAIJ40 Adjustable Cylinder SAIJ40BX180-30S
The AirTAC Airtac SAIJ40 Adjustable Cylinder SAIJ40BX180-30S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø40mm bore and 180mm stroke, G1/4 air ports and adjustable end cushioning. Its standardized mounting interface makes it a drop-in replacement for other ISO 15552 cylinders in automation lines.
- BoreØ40 mm
- Stroke180 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM12×1.25
- CushionAdjustable, 30 mm
About the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX180-30S
The AirTAC SAIJ40X180-30-S is a double-acting, single-rod ISO 15552 profile cylinder equipped with a rear stroke adjuster. It provides a 150-180 mm usable travel window, allowing you to dial back the nominal 180 mm stroke by up to 30 mm during commissioning. Delivering 628 N of push force at 0.5 MPa, it fits medium-duty tasks perfectly.
This variant features a SUS304 stainless steel rod for superior corrosion resistance and uses PT tapered ports. The integrated magnet (-S) supports position sensing with AirTAC CMSE reed or DMSE electronic switches fitted into the dual-side sensor grooves. The extruded aluminum barrel maintains standard ISO 15552 mounting dimensions without relying on tie-rods.
Airtac SAIJ40 Adjustable Cylinder SAIJ40BX180-30S Technical Specifications
| Model | Airtac SAIJ40 Adjustable Cylinder SAIJ40BX180-30S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø40 mm |
| Stroke | 180 mm |
| Acting type | Double acting |
| Port size | G1/4 |
| Rod thread | M12×1.25 |
| 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 – 800 mm/s |
| Cushion | Adjustable, 30 mm |
| Max stroke | Up to 1200 mm |
Specifications follow the official AirTAC SAI series datasheet and ISO 15552 dimensions. Confirm against the product label before installation. Port options: G (BSPP) / NPT.
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 | |
Actual usable force is lower than theoretical due to friction and back-pressure. Size with a safety margin.
Model Code: Airtac SAIJ40 Adjustable Cylinder SAIJ40BX180-30S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×180 | Stroke length in mm. |
| -S | Optional built-in magnet for sensor position sensing. |
Related SAI-family variants: SAID (double rod), SAIJ (adjustable stroke), SAIL (with lock), SAIF (with valve), BSAI (enclasp / clamp-lock), and SAI-S with built-in magnet. Rod material: carbon steel (blank) / SUS420J2 (A) / SUS304 (B); seals: TPU (blank) / Viton H / NBR N.
Where the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX180-30S Is Used
Machine Changeover
Quickly reconfigure the 150-180 mm travel window for different product sizes without physically swapping the cylinder or adding external stopper blocks.
End-Position Tuning
Fine-tune the retract distance during initial commissioning to dial in exact clamping or positioning, absorbing minor mechanical tolerances.
Variable End Stops
Adjust the stroke on the fly for sorting or diverting applications on a line where package sizes frequently vary.
Is the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX180-30S the Right Cylinder?
Select this 40 mm bore when an application requires precise end-position tuning without external stops; if you need less force, the 32 mm bore offers 402 N at 0.5 MPa, while stepping up to 50 mm yields 982 N. The adjustable rear screw lets you set the exact retract distance, which is ideal for product changeovers, but remember it acts only as a travel stop. For loads that must be held without live air pressure, consider an external pilot-operated check valve or the SAIL/BSAI locking cylinder series. To match this ISO 15552 replacement exactly, specify the 40 mm bore, 180 mm stroke, 30 mm adjustment, PT ports, SUS304 rod, and the -S magnet.
Quick checklist
- ✓ Required force at your working pressure
- ✓ Stroke and mounting space
- ✓ Port/thread type (PT/NPT/G)
- ✓ Magnet (-S) for sensors?
- ✓ Side load — consider a guided cylinder
Installation & Maintenance Notes
- check Use clean air filtered to 40µm or finer.
- check Keep within 0.15 – 1.0 MPa operating pressure.
- check Avoid side load on the piston rod.
- check Adjust end cushion screws for smooth stops.
- check Use correct mounting accessory (FA/FB/CA/CB/LB/TC).
- check Installation by qualified personnel per AirTAC docs.
Airtac SAIJ40 Adjustable Cylinder SAIJ40BX180-30S FAQ
The rear adjuster screw allows you to shorten the effective stroke by up to 30 mm, creating a 150-180 mm usable travel window. It functions as a mechanical stop to set the end position and does not lock the load without live air pressure.
At 0.5 MPa, it provides 628 N of push force and 528 N of pull force. At 0.7 MPa, the push force increases to 879 N.
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