Airtac SAIJ100 Adjustable Cylinder SAIJ100BX280-20
The AirTAC Airtac SAIJ100 Adjustable Cylinder SAIJ100BX280-20 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø100mm bore and 280mm 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
- Stroke280 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM20×1.5
- CushionAdjustable, 36 mm
About the Airtac SAIJ100 Adjustable Cylinder SAIJ100BX280-20
The AirTAC SAIJ100X280-20 is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster, delivering 5497N of push force at 0.7 MPa. Its integrated adjuster screw allows you to fine-tune the effective travel down from the 280mm nominal stroke, creating a precise 260-280mm usable window. This eliminates the need to swap cylinders or bolt on external stops during machine commissioning.
This specific configuration features a SUS304 stainless steel rod for superior corrosion resistance and uses PT tapered port threads. The extruded aluminum barrel includes sensor grooves on both sides, and the mounting interface supports Basic, FA, LB, TC, FTC, TCM1, and TCM2 brackets. The rear stopper only sets the travel end-point and does not lock the load without live air pressure.
Airtac SAIJ100 Adjustable Cylinder SAIJ100BX280-20 Technical Specifications
| Model | Airtac SAIJ100 Adjustable Cylinder SAIJ100BX280-20 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø100 mm |
| Stroke | 280 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 SAIJ100BX280-20
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 100 | Bore size in mm. |
| ×280 | 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 SAIJ100BX280-20 Is Used
Product Changeovers
Dial in the 260-280mm travel window during format changes on packaging lines without replacing the entire actuator.
End-Stop Tuning
Fine-tune the retraction point at machine commissioning to perfect pressing or clamping force without external mechanical stops.
Heavy Forming
Leverage the 5497N push force at 0.7 MPa for robust pressing operations while trimming the stroke to match tooling height.
Is the Airtac SAIJ100 Adjustable Cylinder SAIJ100BX280-20 the Right Cylinder?
Choose this 100mm bore cylinder when an application requires heavy thrust (up to 7068N push at 0.9 MPa) alongside variable end-position tuning. If your setup needs less force, stepping down to an 80mm bore yields 3518N at 0.7 MPa, whereas a 125mm bore provides 8590N. The adjustable stroke is ideal for product-size changeovers on a line, whereas a fixed-stroke SAI is better for rigid, unchanging endpoints. Because the nominal stroke is 280mm, ensure proper external guiding to prevent excessive side-loading on the rod.
When specifying a replacement, verify the 100mm bore, 280mm stroke, 20mm adjustment range, PT ports, and the SUS304 rod material. Note that this unit lacks a magnet, so it will not work with CMSE or DMSE sensors without a -S suffix. If true load-holding is required without continuous air pressure, look to the SAIL or BSAI series instead of relying on this 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 SAIJ100BX280-20 FAQ
At 0.7 MPa operating pressure, this 100mm bore cylinder provides 5497N of push force and 5157N of pull force. At 0.5 MPa, the push force is 3927N.
The rear adjuster screw acts as a mechanical stop, allowing you to shorten the effective stroke by up to 20mm. This creates a usable travel window of 260-280mm from the 280mm nominal stroke, though it does not lock the load without live air pressure.
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