Airtac SAIJ40 Adjustable Cylinder SAIJ40BX375-100S
The AirTAC Airtac SAIJ40 Adjustable Cylinder SAIJ40BX375-100S 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 SAIJ40BX375-100S
The AirTAC SAIJ40X375-100-S is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster that allows you to trim the effective travel back by up to 100 mm. This yields a usable stroke window of 275 to 375 mm, enabling precise end-position tuning during commissioning without adding external stops. In the 40 mm bore class, it delivers 879 N of push force and 528 N of pull force at 0.7 MPa.
This variant includes a SUS304 stainless steel piston rod for corrosion resistance and is equipped with a magnet for position sensing using CMSE reed or DMSE solid-state switches. The extruded aluminum barrel integrates sensor grooves on both sides, and the unit supports mounting accessories from a dedicated set including Basic, FA, LB, TC, FTC, TCM1, and TCM2.
Airtac SAIJ40 Adjustable Cylinder SAIJ40BX375-100S Technical Specifications
| Model | Airtac SAIJ40 Adjustable Cylinder SAIJ40BX375-100S |
|---|---|
| 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 SAIJ40BX375-100S
| 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 SAIJ40BX375-100S Is Used
Machine Changeover
Dial in the 275-375 mm stroke window on the fly when switching between product sizes, eliminating the need to physically swap cylinders or reposition external hard stops.
End-Position Tuning
Fine-tune the retract end-position during initial commissioning to absorb mechanical tolerances and achieve precise seating of parts without custom shimming.
Variable Product Diversion
Adjust the diverting stroke distance on packaging lines to accommodate different carton lengths while maintaining consistent pusher force.
Is the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX375-100S the Right Cylinder?
Choose this 40 mm bore when you need 879 N of thrust at 0.7 MPa, stepping up from a 32 mm bore (563 N) if your load demands more force, or down from a 50 mm bore (1374 N) to save space. The 100 mm adjustment window is ideal for product-size changeovers on a line, allowing you to dial in the exact 275-375 mm travel without swapping the cylinder. Because the 375 mm stroke is relatively long, an external guide is recommended to handle side loads and prevent rod bending.
When specifying a replacement, match the 40 mm bore, 375 mm nominal stroke, 100 mm adjustment range, PT tapered ports, and the -S magnet. Remember that the rear adjuster functions only as a travel stop and does not hold the load without live air; for true fail-safe load holding, consider an external rod lock or the SAIL/BSAI series.
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 SAIJ40BX375-100S FAQ
It features a rear adjusting screw that acts as a mechanical stopper, allowing you to shorten the nominal 375 mm stroke by up to 100 mm. This creates a usable travel window of 275 to 375 mm, which can be fine-tuned during setup without changing the cylinder.
At 0.7 MPa operating pressure, the SAIJ40X375-100-S provides 879 N of push force and 528 N of pull force. At its maximum rated pressure of 1.0 MPa, it can deliver up to 128 kgf.
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