Airtac SAIJ40 Adjustable Cylinder SAIJ40BX375-75S
The AirTAC Airtac SAIJ40 Adjustable Cylinder SAIJ40BX375-75S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø40mm bore and 375mm 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
- Stroke375 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM12×1.25
- CushionAdjustable, 30 mm
About the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX375-75S
The AirTAC SAIJ40X375-75-S is a double-acting, single-rod ISO 15552 profile cylinder equipped with a rear stroke adjuster. It provides a nominal 375 mm stroke that can be fine-tuned backward by up to 75 mm, yielding a usable travel window of 300 to 375 mm. Delivering 628 N of push force at 0.5 MPa, it is built with a SUS304 stainless steel rod for superior corrosion resistance and includes a magnet for position sensing.
Because the stroke extends past 300 mm, the 16 mm rod and M12x1.25 thread should be paired with an external guide to handle potential side loads. The rear adjuster acts purely as a mechanical stop to decelerate the travel end and set the exact position; it does not lock the load without live air. For load-holding requirements without continuous pressure, consider an external pilot-operated check valve or the related SAIL lock cylinder.
Airtac SAIJ40 Adjustable Cylinder SAIJ40BX375-75S Technical Specifications
| Model | Airtac SAIJ40 Adjustable Cylinder SAIJ40BX375-75S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø40 mm |
| Stroke | 375 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 SAIJ40BX375-75S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×375 | 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 SAIJ40BX375-75S Is Used
Variable End Stops
Dial in the exact retract distance between 300 and 375 mm during machine setup, allowing flexible product handling without adding external mechanical stops.
Line Changeover
Quickly adjust the stroke window on packaging conveyors to accommodate different carton sizes, reducing downtime between production runs.
Commissioning Fine-Tune
Trim the rear travel stop by up to 75 mm to perfectly align tooling endpoints on the factory floor, preventing hard crashes and mechanical wear.
Is the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX375-75S the Right Cylinder?
Choose this adjustable-stroke model when your application requires variable end positions or precise commissioning tuning without swapping out the entire cylinder. If you need less force, stepping down to a 32 mm bore yields 402 N at 0.5 MPa; stepping up to a 50 mm bore provides 982 N. This SAIJ variant uses a PT tapered port thread and supports a reduced mounting set of Basic, FA, LB, TC, FTC, TCM1, and TCM2, omitting FB, CA, CB, and CR.
To match this exact ISO 15552 replacement, specify a 40 mm bore, 375 mm stroke, 75 mm adjustment range, PT port, and the -S magnet option. The integrated magnet works seamlessly with AirTAC CMSE reed and DMSE electronic solid-state switches mounted in the dual-side sensor grooves on the extruded aluminum barrel.
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 SAIJ40BX375-75S FAQ
At an operating pressure of 0.5 MPa, this 40 mm bore cylinder provides 628 N of push force and 528 N of pull force. At 0.7 MPa, the push force increases to 879 N.
The rear adjuster screw allows you to shorten the effective travel from the nominal 375 mm down to 300 mm. It acts as a mechanical stop to set the end position and relies on the air cushion for deceleration; it does not hold the load without live air pressure.
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