Airtac SAIJ100 Adjustable Cylinder SAIJ100X280-20
The AirTAC Airtac SAIJ100 Adjustable Cylinder SAIJ100X280-20 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 SAIJ100X280-20
The AirTAC SAIJ100X280-20 is a double-acting, single-rod ISO 15552 profile cylinder equipped with a rear stroke adjuster. It provides a nominal 280 mm stroke that can be fine-tuned down by up to 20 mm, giving you a precise 260-280 mm usable travel window during commissioning. Built with a carbon steel rod and PT tapered port threads, it delivers robust thrust up to 3927 N at 0.5 MPa.
This adjustable-stroke design eliminates the need to swap cylinders or bolt on external stops when dialing in final end positions. The extruded aluminum barrel features sensor grooves on both sides, ready for CMSE reed or DMSE electronic switches if a magnet is specified later. It uses a reduced mounting set of Basic, FA, LB, TC, FTC, TCM1, and TCM2, omitting FB, CA, CB, and CR.
Airtac SAIJ100 Adjustable Cylinder SAIJ100X280-20 Technical Specifications
| Model | Airtac SAIJ100 Adjustable Cylinder SAIJ100X280-20 |
|---|---|
| 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 SAIJ100X280-20
| 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 SAIJ100X280-20 Is Used
Variable End-Stop Tuning
Dial in the exact retract position within a 260-280 mm window during machine setup, avoiding the need to machine custom spacers or swap out the entire cylinder.
Product Size Changeover
Quickly adjust the stroke by up to 20 mm when a production line shifts to a different sized product, minimizing downtime and keeping ISO 15552 mounting intact.
Heavy Press Positioning
Leverage the 3927 N push force at 0.5 MPa to position heavy materials, using the rear stopper to fine-tune the final pressing depth without external mechanical stops.
Is the Airtac SAIJ100 Adjustable Cylinder SAIJ100X280-20 the Right Cylinder?
Choose this 100 mm bore when you need heavy thrust between the 80 mm (2513 N push at 0.5 MPa) and 125 mm (6136 N) classes. The adjustable stroke is ideal for product changeovers on a line, letting you shift the retract end-stop by 20 mm without changing the cylinder. If your application requires holding the load without live air pressure, note that the rear adjuster acts only as a travel stop, not a lock; you would need an external rod lock, a pilot-operated check valve, or an AirTAC SAIL or BSAI cylinder for secure load holding.
For a 280 mm stroke, the 25 mm rod diameter and M20x1.5 rod thread provide excellent rigidity, but long unsupported strokes still require an external guide to prevent side-loading damage. To match this cylinder exactly for an ISO 15552 replacement, confirm the 100 mm bore, 280 mm stroke, 20 mm adjustment, G1/2 port, PT thread type, and the required mounting style.
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 SAIJ100X280-20 FAQ
At a 0.5 MPa operating pressure, this 100 mm bore cylinder generates 3927 N of push force and 3681 N of pull force. It can reach up to 7068 N push force at 0.9 MPa.
The rear adjuster screw acts as a mechanical stop, allowing you to shorten the effective stroke by up to 20 mm from the 280 mm nominal length. This creates a 260-280 mm travel window for fine-tuning the end position at commissioning, but it does not lock the load without live air pressure.
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