Airtac SAIJ40 Adjustable Cylinder SAIJ40BX375-75
The AirTAC Airtac SAIJ40 Adjustable Cylinder SAIJ40BX375-75 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 SAIJ40BX375-75
The AirTAC SAIJ40X375-75 is a double-acting, single-rod ISO 15552 profile cylinder featuring a rear stroke adjuster. It provides a nominal 375 mm stroke that can be fine-tuned backward by up to 75 mm, creating a 300-375 mm usable travel window for precise end-position calibration. Delivering 879 N of push force at 0.7 MPa, it integrates a 16 mm rod and M12x1.25 thread for robust load handling.
This model uses a SUS304 stainless steel rod and PT tapered port threads. It features variable air cushions at both ends to decelerate the moving piston. The rear adjuster acts purely as a mechanical stop to set the travel end and does not hold the load without live air pressure; for fail-safe load holding, consider the SAIL or BSAI series.
Airtac SAIJ40 Adjustable Cylinder SAIJ40BX375-75 Technical Specifications
| Model | Airtac SAIJ40 Adjustable Cylinder SAIJ40BX375-75 |
|---|---|
| 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 SAIJ40BX375-75
| 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 SAIJ40BX375-75 Is Used
Product Changeovers
Dial the rear stopper back by up to 75 mm to accommodate different package sizes on a packaging line without replacing the actuator.
Machine Setup
Fine-tune the 300-375 mm travel window during commissioning to perfectly align tooling endpoints without adding external mechanical stops.
Assembly Stations
Utilize the 879 N push force at 0.7 MPa to drive long-travel pressing or indexing operations that require precise end-position tweaking.
Is the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX375-75 the Right Cylinder?
Choose this 40 mm bore when an application requires moderate thrust (879 N push at 0.7 MPa) and a long, variable end-stop. Stepping up to a 50 mm bore raises the push force to 1374 N, while dropping to a 32 mm bore reduces it to 563 N. The adjustable stroke is ideal for machine setups requiring product changeovers without physically swapping cylinders or adding external stops.
Because the 375 mm stroke is relatively long, the 16 mm rod should be guided externally to prevent excessive side-loading and premature seal wear. This SAIJ model is dimensionally interchangeable per ISO 15552 and supports mountings Basic, FA, LB, TC, FTC, TCM1, and TCM2. It omits FB, CA, CB, and CR brackets. Without a -S magnet, it cannot host CMSE or DMSE sensors.
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 SAIJ40BX375-75 FAQ
At 0.7 MPa operating pressure, this 40 mm bore cylinder generates 879 N of push force and 528 N of pull force. The maximum push force is 1130 N at 0.9 MPa.
The rear adjuster screw lets you shorten the 375 mm nominal stroke by up to 75 mm, providing a 300-375 mm usable travel window. It acts as a mechanical stop to set the end position and is not a lock.
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