Airtac SAIJ40 Adjustable Cylinder SAIJ40BX180-40S
The AirTAC Airtac SAIJ40 Adjustable Cylinder SAIJ40BX180-40S 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 SAIJ40BX180-40S
The AirTAC SAIJ40X180-40-S is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster, providing a usable travel window of 140 to 180 mm. Delivering 628 N of push force and 528 N of pull force at 0.5 MPa, it fits neatly into the mid-force range. The barrel is extruded aluminum, not a tie-rod design, ensuring a rigid yet lightweight structure.
This specific SKU features a SUS304 stainless steel rod for superior corrosion resistance and includes a magnet for CMSE reed and DMSE electronic sensors. The PT tapered port threads (G1/4) provide a tight, reliable pneumatic seal. The rear adjuster acts purely as a mechanical stop to trim the stroke during commissioning; it does not lock the load without live air pressure.
Airtac SAIJ40 Adjustable Cylinder SAIJ40BX180-40S Technical Specifications
| Model | Airtac SAIJ40 Adjustable Cylinder SAIJ40BX180-40S |
|---|---|
| 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 SAIJ40BX180-40S
| 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 SAIJ40BX180-40S Is Used
Machine Changeover
Dial in the 140-180 mm travel window on the fly to accommodate new product sizes without physically replacing the cylinder.
End-Position Tuning
Use the rear stopper screw to fine-tune the retract end position during initial commissioning, avoiding the need for external shims.
Stainless Rod Actuation
Leverage the SUS304 rod and DMSE electronic sensor compatibility for reliable actuation in environments requiring high corrosion resistance.
Is the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX180-40S the Right Cylinder?
Choose this adjustable-stroke model over a fixed SAI when you need to fine-tune the end position during machine setup or product changeover without swapping cylinders or adding external stops. If your application requires less force, stepping down to a 32 mm bore yields 402 N of push force at 0.5 MPa. For higher demands, a 50 mm bore provides 982 N. Remember that the rear adjuster is a travel stop, not a lock; for load-holding without live air, consider an SAIL or BSAI cylinder. Because the stroke is 180 mm, side-load risks are moderate, but an external guide is still recommended for optimal rod bearing life. To match this ISO 15552 replacement exactly, verify the 40 mm bore, 180 mm nominal stroke, 40 mm adjustment, PT ports, and the -S magnet option.
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 SAIJ40BX180-40S FAQ
At 0.5 MPa operating pressure, this 40 mm bore cylinder generates 628 N of push force and 528 N of pull force. At the maximum operating pressure of 1.0 MPa, it can deliver up to 128 kgf.
The rear adjuster screw allows you to shorten the 180 mm nominal stroke by up to 40 mm, creating a usable travel window of 140 to 180 mm. This stopper only sets the end position and does not hold the load without live air pressure.
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