Airtac SAIJ100 Adjustable Cylinder SAIJ100BX70-40
The AirTAC Airtac SAIJ100 Adjustable Cylinder SAIJ100BX70-40 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø100mm bore and 70mm stroke, G1/2 air ports and adjustable end cushioning. Its standardized mounting interface makes it a drop-in replacement for other ISO 15552 cylinders in automation lines.
- BoreØ100 mm
- Stroke70 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM20×1.5
- CushionAdjustable, 36 mm
About the Airtac SAIJ100 Adjustable Cylinder SAIJ100BX70-40
The AirTAC SAIJ100X70-40 is a double-acting ISO 15552 profile cylinder featuring a rear-mounted stroke adjuster. It provides a nominal 70mm stroke that can be dialed back by up to 40mm, yielding a precise 30-70mm usable travel window for on-the-fly end-position tuning. Delivering 3927N of push force at 0.5MPa, it is dimensionally interchangeable with ISO 15552 cylinders such as standard SMC or Festo profiles.
This specific configuration includes a SUS304 stainless steel piston rod (material code B) for superior corrosion resistance in wet or washdown environments. The extruded aluminum barrel integrates sensor grooves on both sides, and while this base unit lacks a magnet, adding an -S option enables compatibility with AirTAC CMSE reed and DMSE solid-state sensors.
Airtac SAIJ100 Adjustable Cylinder SAIJ100BX70-40 Technical Specifications
| Model | Airtac SAIJ100 Adjustable Cylinder SAIJ100BX70-40 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø100 mm |
| Stroke | 70 mm |
| Acting type | Double acting |
| Port size | G1/2 |
| Rod thread | M20×1.5 |
| 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, 36 mm |
| Max stroke | Up to 1500 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 (Ø100mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 3927 N | 3682 N |
| 0.7 MPa | 5498 N | — |
| Max (@1.0 MPa) | 801 kgf | |
Actual usable force is lower than theoretical due to friction and back-pressure. Size with a safety margin.
Model Code: Airtac SAIJ100 Adjustable Cylinder SAIJ100BX70-40
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 100 | Bore size in mm. |
| ×70 | 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 SAIJ100 Adjustable Cylinder SAIJ100BX70-40 Is Used
Product Changeover
Dial in the exact 30-70mm stroke window during format changes on a packaging line without replacing the entire actuator or repositioning hard stops.
End-Position Tuning
Fine-tune the retract distance at machine commissioning to perfect material feeding, using the rear screw to dial out mechanical tolerance stack-up.
Washdown Conveying
Leverage the 3927N push force and SUS304 stainless rod to push heavy pallets or diverters in food-grade environments requiring frequent washdowns.
Is the Airtac SAIJ100 Adjustable Cylinder SAIJ100BX70-40 the Right Cylinder?
Choose this 100mm bore when a 50mm bore (982N at 0.5MPa) lacks the thrust to move your load, but a 125mm unit is physically oversized. The 40mm adjustment screw allows you to fine-tune the retract end-position during commissioning or product changeover without swapping the cylinder or adding external mechanical stops. The PT tapered port threads match standard pneumatic fittings, and the mounting hardware uses the SAIJ subset (Basic, FA, LB, TC, FTC, TCM1, TCM2), omitting FB, CA, CB, and CR.
Because the 25mm rod and M20x1.5 thread handle substantial side loads, this cylinder maintains rigid operation even at the shortest 30mm adjusted stroke. However, the rear adjuster acts strictly as a travel stop and does not hold the load without live air pressure; for fail-safe load holding, consider the BSAI clamp-lock or SAIL pneumatic lock variants.
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 SAIJ100 Adjustable Cylinder SAIJ100BX70-40 FAQ
At 0.5MPa operating pressure, it provides 3927N of push force and 3681N of pull force. At the maximum 1.0MPa pressure, the push force increases to 801kgf.
The rear adjuster screw acts as a stopper that can shorten the effective travel by up to 40mm. This creates an adjustable 30-70mm travel window, allowing you to set the exact retract position without changing the cylinder itself.
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