Airtac SAIJ100 Adjustable Cylinder SAIJ100BX425-40S
The AirTAC Airtac SAIJ100 Adjustable Cylinder SAIJ100BX425-40S 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 SAIJ100BX425-40S
The AirTAC SAIJ100X425-40-S is a double-acting, single-rod ISO 15552 profile cylinder equipped with a rear stroke adjuster. It delivers a robust 3927N of push force at 0.5MPa, stepping up to 7068N at 0.9MPa. By turning the rear stopper screw, you can trim the nominal 425mm travel back by up to 40mm, creating a precise 385-425mm usable end-position window without swapping out the unit.
This specific configuration features a SUS304 stainless steel rod for superior corrosion resistance and ships with a magnet for position sensing. It accepts PT tapered port threads (G1/2) and relies on variable air cushions at both ends to decelerate the load. The rear adjuster functions purely as a travel stop, meaning it cannot hold a load dynamically without continuous live air pressure.
Airtac SAIJ100 Adjustable Cylinder SAIJ100BX425-40S Technical Specifications
| Model | Airtac SAIJ100 Adjustable Cylinder SAIJ100BX425-40S |
|---|---|
| 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 SAIJ100BX425-40S
| 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 SAIJ100BX425-40S Is Used
Variable End-Stop Positioning
Dial in the exact retraction point within the 385-425mm window during machine setup to accommodate changing material thicknesses without hardware changes.
Product Changeover Systems
Rapidly adjust the stroke stopper on packaging or sorting lines to handle different product sizes on the fly, minimizing downtime.
Corrosion-Resistant Actuation
Leverage the SUS304 stainless steel rod in washdown or mildly corrosive industrial environments while maintaining standard ISO 15552 mounting footprints.
Is the Airtac SAIJ100 Adjustable Cylinder SAIJ100BX425-40S the Right Cylinder?
Choose this adjustable-stroke model when your application requires fine end-position tuning during commissioning or frequent product-size changeovers, avoiding the need to bolt on external stops or purchase multiple fixed-stroke SAI cylinders. If you need to step down the force, the bore 80 provides 2513N at 0.5MPa; stepping up to bore 125 yields 6136N.
Because the 425mm stroke is substantial, the 25mm rod diameter should still be supported by an external guide to prevent excessive side-loading. For load-holding requirements without live air, this cylinder is not a lock; you should pivot to the SAIL (air-released lock) or BSAI (clamp-lock) series. This SKU is dimensionally interchangeable per ISO 15552 mounting interfaces.
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 SAIJ100BX425-40S FAQ
At 0.5MPa it provides 3927N of push force and 3681N of pull force. At 0.9MPa, the push force increases to 7068N.
The rear stopper screw lets you shorten the 425mm nominal stroke by up to 40mm, providing a usable travel window of 385-425mm for fine-tuning the end position at commissioning.
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