Airtac SAIJ40 Adjustable Cylinder SAIJ40BX375-30
The AirTAC Airtac SAIJ40 Adjustable Cylinder SAIJ40BX375-30 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 SAIJ40BX375-30
The AirTAC SAIJ40X375-30 is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster. It provides a usable travel window of 345 to 375 mm, allowing you to dial back the nominal stroke by up to 30 mm during machine commissioning. Delivering 628 N of push force at 0.5 MPa, it handles medium-duty positioning tasks effectively.
This unit is built with a SUS304 stainless steel rod for corrosion resistance and uses PT tapered port threads. The extruded aluminum barrel includes sensor grooves on both sides, ready for DMSE solid-state or CMSE reed switches if needed later. Because the 375 mm stroke is relatively long, an external guide is recommended to prevent excessive side-loading on the rod.
Airtac SAIJ40 Adjustable Cylinder SAIJ40BX375-30 Technical Specifications
| Model | Airtac SAIJ40 Adjustable Cylinder SAIJ40BX375-30 |
|---|---|
| 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 SAIJ40BX375-30
| 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 SAIJ40BX375-30 Is Used
Machine Setup Tuning
Fine-tune the end stop during initial commissioning to achieve exact positioning without machining custom spacer blocks.
Product Changeover
Quickly adjust the stroke window from 375 mm down to 345 mm to accommodate varying package sizes on a packaging line.
Long-Travel Assembly
Manage extended 375 mm actuation sequences in automated assembly stations while relying on cushions for smooth end deceleration.
Is the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX375-30 the Right Cylinder?
Choose this adjustable model over a fixed-stroke SAI when you need precise end-position tuning without swapping cylinders or adding external stops. If your application requires less force, stepping down to a 32 mm bore yields 402 N of push at 0.5 MPa; conversely, a 50 mm bore provides 982 N.
Remember that the rear adjuster acts only as a travel stop and the air cushions handle deceleration—neither will hold a load without live air pressure. For drop prevention, consider an AirTAC SAIL or BSAI series. This SAIJ40X375-30 is dimensionally interchangeable per ISO 15552 and supports Basic, FA, LB, TC, FTC, TCM1, and TCM2 mounts.
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 SAIJ40BX375-30 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. It can deliver up to 1130 N of push force at 0.9 MPa.
The rear adjuster screw lets you shorten the effective stroke from its 375 mm nominal length, providing a usable travel window of 345 to 375 mm. This stopper sets the retract end position but does not lock the load without continuous air pressure.
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