Airtac SAIJ40 Adjustable Cylinder SAIJ40BX100-75S
The AirTAC Airtac SAIJ40 Adjustable Cylinder SAIJ40BX100-75S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø40mm bore and 100mm 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
- Stroke100 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM12×1.25
- CushionAdjustable, 30 mm
About the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX100-75S
The AirTAC SAIJ40X100-75-S is a double-acting ISO 15552 profile cylinder featuring a rear-mounted stroke adjuster. Equipped with a SUS304 stainless steel rod and a position-sensing magnet, it delivers 879N of push force at 0.7 MPa. The integrated rear stopper allows you to dial back the 100mm nominal stroke by up to 75mm, creating a highly versatile 25-100mm usable travel window for precise end-position tuning.
This adjustable design eliminates the need to physically swap cylinders or bolt on external stops during machine changeovers. The PT tapered port and extruded aluminum barrel with dual sensor grooves ensure reliable sealing and straightforward sensor mounting. Remember that the rear adjuster acts only as a travel stop and does not hold the load without live air pressure.
Airtac SAIJ40 Adjustable Cylinder SAIJ40BX100-75S Technical Specifications
| Model | Airtac SAIJ40 Adjustable Cylinder SAIJ40BX100-75S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø40 mm |
| Stroke | 100 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 SAIJ40BX100-75S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×100 | 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 SAIJ40BX100-75S Is Used
Product Changeover Tuning
Dial in the exact end-stop for new product sizes on a packaging line without swapping out the entire actuator.
Machine Setup Calibration
Fine-tune the 25-100mm travel window during commissioning to perfectly time the stroke of a feeding mechanism.
Variable End-Position Stops
Adjust the retract distance on the fly for testing different material thicknesses or pressing depths.
Is the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX100-75S the Right Cylinder?
Choose this 40mm bore cylinder when your application requires variable end-stops within a 25-100mm travel window, stepping up from a 32mm bore that provides 563N push force at 0.7 MPa. The SUS304 rod material is specified here for superior corrosion resistance, and the included magnet enables direct use with AirTAC CMSE reed and DMSE solid-state sensors. The mounting options encompass the reduced SAIJ set: Basic, FA, LB, TC, FTC, TCM1, and TCM2, omitting the FB, CA, CB, and CR brackets.
If your process requires the piston rod to hold its position and carry a load without continuous live air, this cylinder's adjuster will not act as a lock. For those scenarios, select an AirTAC SAIL (air-released lock) or BSAI (clamp-lock) cylinder instead.
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 SAIJ40BX100-75S FAQ
It features a rear adjuster screw that lets you mechanically shorten the 100mm nominal stroke by up to 75mm. This creates a usable travel window of 25-100mm, allowing you to set the exact retract end-position without adding external stops.
At an operating pressure of 0.7 MPa, the SAIJ40X100-75-S generates 879N of push force and 528N of pull force. It can deliver up to 1130N of push force at 0.9 MPa.
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Covers non-human-caused product damage.
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Standard models usually ship in 3-4 days.
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