Airtac SAIJ100 Adjustable Cylinder SAIJ100BX425-40
The AirTAC Airtac SAIJ100 Adjustable Cylinder SAIJ100BX425-40 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 SAIJ100BX425-40
The AirTAC SAIJ100X425-40 is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster, enabling you to dial back the 425 mm nominal travel by up to 40 mm. This yields a usable end-position window of 385 to 425 mm, allowing precise fine-tuning during commissioning or product changeovers without adding external stops. It features a SUS304 stainless steel rod for corrosion resistance and uses PT tapered port threads.
Delivering 3927 N of push force at 0.5 MPa (and up to 7068 N at 0.9 MPa), this 100 mm bore actuator is built for heavy-duty handling. The extruded aluminum barrel includes sensor grooves on both sides for CMSE reed and DMSE electronic switches. Mounting options include Basic, FA, LB, TC, FTC, TCM1, and TCM2, omitting the FB, CA, CB, and CR variants found on some standard series.
Airtac SAIJ100 Adjustable Cylinder SAIJ100BX425-40 Technical Specifications
| Model | Airtac SAIJ100 Adjustable Cylinder SAIJ100BX425-40 |
|---|---|
| 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 SAIJ100BX425-40
| 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 SAIJ100BX425-40 Is Used
Product Changeover
Dial in the 385-425 mm travel window during format changes on packaging lines, avoiding the need to physically swap cylinders for different carton sizes.
End-Position Tuning
Fine-tune the retract end-stop at commissioning to perfect seating pressure against a workpiece without adding external mechanical stops.
Heavy Material Handling
Leverage the 3927 N push force at 0.5 MPa to move heavy pallets or chassis, using the rear adjuster to vary the final push-off distance.
Is the Airtac SAIJ100 Adjustable Cylinder SAIJ100BX425-40 the Right Cylinder?
Choose this 100 mm bore actuator when your application requires the 3927 N push force at 0.5 MPa, which is a significant step up from the 1559 N provided by the 63 mm bore variant. The adjustable -40 mm stopper is ideal for variable end-stops on processing lines, whereas a fixed-stroke SAI cylinder would require physical shimming or swapping to achieve different end positions. For holding loads without live air pressure, note that the SAIJ rear adjuster is strictly a travel stop, not a lock; you would need to specify an SAIL or BSAI cylinder, or use an external rod lock.
Because the 425 mm stroke is relatively long, the 25 mm diameter rod and M20x1.5 thread will carry substantial side loads, but an external guide is still recommended to prevent premature wear. The unit operates at speeds of 30-800 mm/s and is dimensionally interchangeable per ISO 15552. To match this exact replacement, use bore 100, stroke 425, 40 mm adjustment, PT ports, and the appropriate mounting accessory.
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 SAIJ100BX425-40 FAQ
At 0.5 MPa operating pressure, this 100 mm bore cylinder provides 3927 N of push force and 3681 N of pull force. At 0.9 MPa, the push force increases to 7068 N.
The rear adjuster acts as a travel stop that allows you to shorten the 425 mm nominal stroke by up to 40 mm, creating a 385-425 mm usable travel window. It only sets the end position and does not lock or hold the load without live air pressure.
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