Airtac SAIJ100 Adjustable Cylinder SAIJ100BX425-100
The AirTAC Airtac SAIJ100 Adjustable Cylinder SAIJ100BX425-100 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 SAIJ100BX425-100
The AirTAC SAIJ100X425-100 is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster, allowing you to dial back the nominal 425 mm travel by up to 100 mm. This creates a highly flexible 325-425 mm usable stroke window, letting you fine-tune the retract end-position during commissioning without swapping out the cylinder. It delivers robust thrust, providing 3927 N of push force at 0.5 MPa and up to 7068 N at 0.9 MPa.
This unit features a SUS304 stainless steel rod (option B) for superior corrosion resistance and uses PT tapered port threads with a G1/2 connection. The extruded aluminum barrel includes sensor grooves on both sides, ready for CMSE reed or DMSE electronic switches if a magnet is added later. Mounting options include Basic, FA, LB, TC, FTC, TCM1, and TCM2.
Airtac SAIJ100 Adjustable Cylinder SAIJ100BX425-100 Technical Specifications
| Model | Airtac SAIJ100 Adjustable Cylinder SAIJ100BX425-100 |
|---|---|
| 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 SAIJ100BX425-100
| 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 SAIJ100BX425-100 Is Used
Variable End-Stop Machining
Fine-tune the 325-425 mm retract position on the fly to accommodate different part lengths without physically changing out the cylinder assembly.
Product Changeover Diverter
Rapidly reconfigure the stroke distance on packaging lines handling varying carton sizes, using the 100 mm rear adjustment screw to set precise indexing.
Heavy-Duty Pressing
Leverage the 7068 N push force at 0.9 MPa for pressing applications where the exact bottoming position requires in-machine calibration.
Is the Airtac SAIJ100 Adjustable Cylinder SAIJ100BX425-100 the Right Cylinder?
Choose this 100 mm bore when your application requires significantly more force than a 63 mm cylinder (which provides 1559 N push at 0.5 MPa), but without the full bulk of a 125 mm unit. The 100 mm adjustment range is ideal for production lines running mixed product sizes, as the end-stop can be reconfigured rapidly. Because the 425 mm stroke is relatively long, ensure adequate external guiding to prevent excessive side-loading on the SUS304 rod.
When specifying a replacement, match the 100 mm bore, 425 mm stroke, 100 mm adjustment, PT port thread, and the desired mounting style. Remember that the rear adjuster acts strictly as a travel stop and does not hold the load without live air; for pneumatic locking, consider the SAIL or BSAI series instead of relying on the cushion or adjuster.
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 SAIJ100BX425-100 FAQ
At 0.5 MPa, 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 screw allows you to shorten the 425 mm nominal stroke by up to 100 mm, providing a usable travel window of 325-425 mm. It functions as a physical stop and does not lock the load without continuous air pressure.
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