Airtac SAIJ40 Adjustable Cylinder SAIJ40BX230-75
The AirTAC Airtac SAIJ40 Adjustable Cylinder SAIJ40BX230-75 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø40mm bore and 230mm 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
- Stroke230 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM12×1.25
- CushionAdjustable, 30 mm
About the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX230-75
The AirTAC SAIJ40X230-75 is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster that allows you to trim the nominal 230 mm travel back by up to 75 mm. This creates a highly flexible 155-230 mm usable travel window, enabling precise end-position tuning at commissioning without swapping out the barrel or adding external stops. In the 40 mm bore class, it delivers 628 N of push force and 528 N of pull force at 0.5 MPa.
This unit is configured with a SUS304 stainless steel rod for superior corrosion resistance and carries air cushioning at both ends to decelerate the piston. The extruded aluminum barrel includes sensor grooves on both sides for mounting CMSE reed or DMSE electronic switches. Because the stroke is 230 mm, the 16 mm rod and M12x1.25 thread provide robust support, though an external guide is recommended for any heavy offset loads.
Airtac SAIJ40 Adjustable Cylinder SAIJ40BX230-75 Technical Specifications
| Model | Airtac SAIJ40 Adjustable Cylinder SAIJ40BX230-75 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø40 mm |
| Stroke | 230 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 SAIJ40BX230-75
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×230 | 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 SAIJ40BX230-75 Is Used
Machine Changeover
Dial in the exact 155-230 mm retraction stop during product size transitions without physically replacing the cylinder or re-engineering the fixture.
End-Position Calibration
Fine-tune the final end-stop at commissioning to dial out mechanical tolerances, ensuring precise placement using the 75 mm adjustment range.
Variable Diverter Stroke
Adjust the actuation travel on the fly for different package sizes on a conveyor line, using the rear screw to set the exact retract distance.
Is the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX230-75 the Right Cylinder?
Choose this 40 mm bore adjustable cylinder when your machine setup requires variable end stops or frequent product-size changeovers, stepping up from a 32 mm bore (402 N push at 0.5 MPa) if you need greater thrust, or down to a 50 mm bore (982 N push at 0.5 MPa) for heavier payloads. The rear adjuster screw acts purely as a mechanical travel stop to set the retraction position; it does not hold the load without live air pressure. For true load-holding without continuous air, select the SAIL pneumatic lock or BSAI clamp-lock series instead.
When replacing an ISO 15552 cylinder, match the 40 mm bore, 230 mm stroke, 75 mm adjustment range, PT tapered port (G1/4), and your required mounting accessory. The SAIJ series supports a reduced mounting set including Basic, FA, LB, TC, FTC, TCM1, and TCM2, omitting the FB, CA, CB, and CR options. For strokes of 300 mm or more, an external guide is advised to manage side loading.
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 SAIJ40BX230-75 FAQ
At a 0.5 MPa operating pressure, this 40 mm bore cylinder provides 628 N of push force and 528 N of pull force. At the maximum 1.0 MPa pressure, it can deliver up to 128 kgf.
The rear adjuster screw acts as a mechanical stop that lets you shorten the 230 mm nominal stroke by up to 75 mm, creating a 155-230 mm usable travel window. It functions as a travel stop and does not lock or hold the load without live air pressure.
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