Airtac SAIJ40 Adjustable Cylinder SAIJ40BX230-75S
The AirTAC Airtac SAIJ40 Adjustable Cylinder SAIJ40BX230-75S 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 SAIJ40BX230-75S
The AirTAC SAIJ40X230-75-S is a double-acting, single-rod ISO 15552 profile cylinder equipped with a rear stroke adjuster. It delivers 879N of push force at 0.7 MPa and features a 230mm nominal stroke that can be fine-tuned backward by up to 75mm, creating a precise 155-230mm usable travel window. This adjustability allows you to dial in exact end positions during commissioning without swapping out the entire unit.
Built with a SUS304 stainless steel rod (option B) and a PT tapered port thread, this 40mm bore profile cylinder integrates seamlessly into existing setups. The integrated magnet (-S) supports position sensing via AirTAC CMSE reed or DMSE electronic solid-state switches fitted into the dual sensor grooves. It utilizes a reduced mounting set of Basic, FA, LB, TC, FTC, TCM1, and TCM2, omitting FB, CA, CB, and CR options.
Airtac SAIJ40 Adjustable Cylinder SAIJ40BX230-75S Technical Specifications
| Model | Airtac SAIJ40 Adjustable Cylinder SAIJ40BX230-75S |
|---|---|
| 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 SAIJ40BX230-75S
| 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 SAIJ40BX230-75S Is Used
Product Changeovers
Quickly modify the 155-230mm travel window during packaging line format changes to accommodate different carton sizes without changing the cylinder.
Machine Setup
Fine-tune the retract end position during initial commissioning to achieve precise alignment, avoiding the need for external mechanical stops.
Variable End Stops
Dial in the exact clamping depth on testing fixtures where the required stroke varies slightly between different production runs.
Is the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX230-75S the Right Cylinder?
Choose this 40mm bore when an application requires 879N push force at 0.7 MPa but might need to step down to a 32mm bore (offering 563N push) for lighter duties, or up to a 50mm bore (1374N push) for heavier loads. The 75mm adjustment range is perfect for machines handling frequent product changeovers, allowing the retract end-stop to be modified on the fly instead of relying on a fixed-stroke SAI cylinder. Because the rear screw acts only as a travel stop and the air cushions handle deceleration, neither will hold a load without live air; for true load-holding, consider the SAIL or BSAI series. Since the 230mm stroke is substantial, ensure external guides support the load to prevent excessive side-loading on the rod.
When specifying a replacement, verify the 40mm bore, 230mm stroke, 75mm adjustment, PT port thread, SUS304 rod material, and the -S magnet requirement. The ISO 15552 mounting interface ensures dimensional interchangeability with standard profile cylinders.
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 SAIJ40BX230-75S FAQ
At 0.7 MPa operating pressure, this 40mm bore cylinder provides 879N of push force and 528N of pull force. At 0.5 MPa, it delivers 628N push and 528N pull.
The rear adjuster screw allows you to shorten the effective stroke by up to 75mm from the 230mm nominal length, providing a usable travel window of 155-230mm. The adjuster acts as a mechanical stop to set the end position and does not lock the load without continuous air pressure.
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