Airtac SAIJ40 Adjustable Cylinder SAIJ40BX180-50
The AirTAC Airtac SAIJ40 Adjustable Cylinder SAIJ40BX180-50 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 SAIJ40BX180-50
The AirTAC SAIJ40X180-50 is a double-acting ISO 15552 profile cylinder featuring a rear-mounted stroke adjuster. It provides a 130-180 mm usable travel window, allowing you to dial back the 180 mm nominal stroke by up to 50 mm during commissioning. Delivering 879 N of push force at 0.7 MPa, it bridges the gap between compact 32 mm bores and heavier 50 mm units.
This variant uses a SUS304 stainless steel rod for superior corrosion resistance and features PT tapered port threads. The extruded aluminum barrel includes sensor grooves on both sides, ready to accept DMSE solid-state or CMSE reed switches if a magnet is specified later. It supports a reduced mounting set including Basic, FA, LB, TC, FTC, TCM1, and TCM2.
Airtac SAIJ40 Adjustable Cylinder SAIJ40BX180-50 Technical Specifications
| Model | Airtac SAIJ40 Adjustable Cylinder SAIJ40BX180-50 |
|---|---|
| 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 SAIJ40BX180-50
| 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 SAIJ40BX180-50 Is Used
Product Changeover
Dial in the 130-180 mm travel window during format size changes on packaging lines without physically swapping the actuator.
Variable End-Stops
Set precise retract positions for multi-tier feeding stations using the rear adjuster rather than installing external mechanical stops.
Commissioning Fine-Tune
Trim the effective stroke by up to 50 mm during machine setup to perfect timing and avoid mechanical crashes.
Is the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX180-50 the Right Cylinder?
Choose this 40 mm bore when an application requires 879 N of push force at 0.7 MPa, stepping up from the 563 N of a 32 mm bore without jumping to the 1374 N of a 50 mm unit. The 50 mm adjustment range is ideal for product changeovers on a packaging line, letting you set variable end-stops without adding external physical stops or swapping out a fixed-stroke SAI cylinder.
For any stroke of 300 mm or more, the M12x1.25 rod thread and 16 mm rod diameter need external guidance to prevent excessive side-loading. Remember that the rear adjuster acts only as a travel stop and does not hold the load without live air; for true load-holding, select an SAIL or BSAI cylinder. To match this ISO 15552 interchangeable unit, specify the 40 mm bore, 180 mm stroke, 50 mm adjust, PT G1/4 port, and the desired mounting style.
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 SAIJ40BX180-50 FAQ
At a 0.7 MPa operating pressure, this 40 mm bore cylinder provides 879 N of push force and 528 N of pull force. At the maximum 1.0 MPa pressure, it delivers up to 128 kgf.
The rear adjuster screw acts as a mechanical stop that shortens the effective travel from the 180 mm nominal stroke down to as little as 130 mm. This creates a 130-180 mm usable window for fine-tuning the retract end position at commissioning.
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