Airtac SAIJ40 Adjustable Cylinder SAIJ40BX115-100S
The AirTAC Airtac SAIJ40 Adjustable Cylinder SAIJ40BX115-100S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø40mm bore and 115mm 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
- Stroke115 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM12×1.25
- CushionAdjustable, 30 mm
About the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX115-100S
The AirTAC SAIJ40X115-100-S is a double-acting, single-rod ISO 15552 profile cylinder equipped with a rear stroke adjuster. It provides a usable travel window of 15-115mm, letting you shorten the 115mm nominal stroke by up to 100mm during commissioning. Delivering 879N of push force at 0.7MPa, it handles medium-duty positioning tasks. The barrel is extruded aluminum with sensor grooves on both sides.
This configuration includes a SUS304 stainless steel rod for corrosion resistance and a PT tapered port thread. The integrated magnet supports position sensing with AirTAC CMSE reed or DMSE electronic switches. The rear adjuster acts as a travel stop to fine-tune the end position without adding external stops, but it does not hold the load without live air pressure. Mounting options include Basic, FA, LB, TC, FTC, TCM1, and TCM2.
Airtac SAIJ40 Adjustable Cylinder SAIJ40BX115-100S Technical Specifications
| Model | Airtac SAIJ40 Adjustable Cylinder SAIJ40BX115-100S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø40 mm |
| Stroke | 115 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 SAIJ40BX115-100S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×115 | 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 SAIJ40BX115-100S Is Used
Machine Changeovers
Dial in the exact end-stop for varying product lengths on a single line, trimming the 115mm stroke up to 100mm to avoid rebuilding the station.
Fixture Positioning
Use the 15-115mm travel window to set precise clamping depths during commissioning without adding bulky external physical stops.
Sensor Calibration
Leverage the integrated magnet with DMSE electronic sensors to confirm the adjusted retracted position across the wide travel window.
Is the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX115-100S the Right Cylinder?
Choose this SAIJ40X115-100-S when your setup requires exact end-position tuning over a wide 100mm range without swapping cylinders. If your application needs less fine-tune travel, the SAIJ40X115-50-S offers a tighter 65-115mm window. For higher force demands, stepping up to a 50mm bore provides 1374N of push force at 0.7MPa. Because the stroke is under 300mm, side-load risks are moderate, but an external guide is still recommended for heavy lateral loads.
As an adjustable-stroke cylinder, it excels in machine changeovers where product sizes vary. The rear adjuster and air cushion only decelerate the travel end; they do not function as a lock. For load-holding without live air, consider the SAIL or BSAI series. This -S variant is dimensionally interchangeable per ISO 15552 and includes the magnet for CMSE/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 SAIJ40BX115-100S FAQ
At 0.7MPa operating pressure, this 40mm bore cylinder generates 879N of push force and 738N of pull force. It can reach 1130N push at 0.9MPa.
A rear adjusting screw acts as a mechanical stop, allowing you to shorten the 115mm nominal stroke down to 15mm. This creates a 15-115mm usable travel window for fine-tuning at commissioning.
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