Airtac SAIJ40 Adjustable Cylinder SAIJ40BX375-100
The AirTAC Airtac SAIJ40 Adjustable Cylinder SAIJ40BX375-100 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 SAIJ40BX375-100
The AirTAC SAIJ40X375-100 is a double-acting, single-rod ISO 15552 profile cylinder featuring a rear-mounted stroke adjuster. It provides a 275 to 375 mm usable travel window, allowing you to dial back the 375 mm nominal stroke by up to 100 mm during commissioning. This bore delivers 628 N of push force at 0.5 MPa and uses a PT tapered port thread.
Built with an SUS304 stainless steel rod for superior corrosion resistance, this model integrates variable air cushions at both ends. The rear adjuster acts purely as a mechanical stop for end-position tuning; it does not hold the load without live air pressure. For load-holding requirements, consider the SAIL or BSAI series instead.
Airtac SAIJ40 Adjustable Cylinder SAIJ40BX375-100 Technical Specifications
| Model | Airtac SAIJ40 Adjustable Cylinder SAIJ40BX375-100 |
|---|---|
| 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 SAIJ40BX375-100
| 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 SAIJ40BX375-100 Is Used
Machine Setup & Changeover
Fine-tune the retract end-position across a 275-375 mm window during product size changes without physically swapping the cylinder or bolting on external stops.
Variable End-Stop Diverter
Adjust the stroke on the fly to alter a diverter arm's reach on a conveyor system, accommodating different package sizes on the same production line.
Custom Stroke Calibration
Dial in the exact 375 mm or slightly shorter travel needed for precise pressing or positioning tasks during initial equipment commissioning.
Is the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX375-100 the Right Cylinder?
Choose this 40 mm bore if your application requires 628 N push force at 0.5 MPa, stepping down from a 63 mm bore (1559 N) for a lighter footprint, or up from a 32 mm bore (402 N) when more thrust is needed. The 100 mm adjustment window is ideal for product changeovers on a packaging line, removing the need to swap cylinders or add external physical stops.
Because the 375 mm stroke is relatively long, the 16 mm rod will experience greater deflection under side loads; always use an external guide rail to prevent rod damage. To match this ISO 15552 replacement exactly, specify: 40 mm bore, 375 mm stroke, 100 mm adjuster, PT ports, Basic/FA/LB/TC/FTC/TCM1/TCM2 mountings, and no magnet.
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 SAIJ40BX375-100 FAQ
At 0.5 MPa operating pressure, this 40 mm bore cylinder generates 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 adjusting screw lets you mechanically shorten the effective travel from 375 mm down to as little as 275 mm. This stopper fine-tunes the end position but does not lock the load without continuous air pressure.
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