Airtac SAIJ100 Adjustable Cylinder SAIJ100BX425-20S
The AirTAC Airtac SAIJ100 Adjustable Cylinder SAIJ100BX425-20S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø100mm bore and 425mm 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
- Stroke425 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM20×1.5
- CushionAdjustable, 36 mm
About the Airtac SAIJ100 Adjustable Cylinder SAIJ100BX425-20S
The AirTAC SAIJ100X425-20-S is a double-acting, single-rod ISO 15552 profile cylinder equipped with a rear stroke adjuster. It provides a nominal 425 mm stroke that can be dialed back by up to 20 mm, yielding a precise 405-425 mm usable travel window. Operating at 0.5 MPa, it generates 3927 N of push force and 3681 N of pull force. This model includes a SUS304 stainless steel rod for enhanced corrosion resistance and a PT tapered port thread.
Because the 425 mm stroke is substantial, the 25 mm rod diameter and M20x1.5 rod thread provide robust support, though an external guide is still recommended for heavy lateral loads. The extruded aluminum barrel features sensor grooves on both sides for CMSE reed and DMSE electronic switches. Mounting options include Basic, FA, LB, TC, FTC, TCM1, and TCM2. The rear adjuster acts strictly as a travel stop for end-position tuning, not a lock, so live air is required to hold the load.
Airtac SAIJ100 Adjustable Cylinder SAIJ100BX425-20S Technical Specifications
| Model | Airtac SAIJ100 Adjustable Cylinder SAIJ100BX425-20S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø100 mm |
| Stroke | 425 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 SAIJ100BX425-20S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 100 | Bore size in mm. |
| ×425 | 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 SAIJ100BX425-20S Is Used
Product Size Changeover
Dial in the 405-425 mm stroke window during packaging line format changes to accommodate varying carton dimensions without mechanical rebuilds.
End-Stop Calibration
Fine-tune the final retract position during machine commissioning to perfect pressing operations, avoiding the need to swap out the entire cylinder.
Variable Positioning
Set precise travel limits on heavy-duty material handling stations where the 3927 N push force is needed to move substantial workpieces.
Is the Airtac SAIJ100 Adjustable Cylinder SAIJ100BX425-20S the Right Cylinder?
Select this 100 mm bore model when your application requires substantial thrust—such as the 3927 N push force at 0.5 MPa—and on-the-fly end-position tuning without swapping cylinders or adding external stops. If you need less force, stepping down to an 80 mm bore yields 2513 N of push force at 0.5 MPa. Conversely, moving up to a 125 mm bore provides 6136 N. The adjustable 405-425 mm window is perfect for machine setups requiring variable end stops or product-size changeovers.
As a dimensionally interchangeable ISO 15552 cylinder, this model replaces standard units when matched on bore, stroke, 20 mm adjustment, PT port, and mounting set. It operates at speeds of 30-800 mm/s. For load-holding without continuous air pressure, this cylinder is insufficient; you should consider the SAIL (air-released lock) or BSAI (clamp-lock) variants 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 SAIJ100 Adjustable Cylinder SAIJ100BX425-20S FAQ
The rear adjusting screw acts as a mechanical stopper that shortens the effective stroke by up to 20 mm. This creates a 405-425 mm usable travel window, allowing you to fine-tune the retract end position at commissioning without replacing the cylinder.
At a standard 0.5 MPa operating pressure, the SAIJ100X425-20-S provides 3927 N of push force and 3681 N of pull force. The maximum thrust is 801 kgf at 1.0 MPa.
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