Airtac SAIJ100 Adjustable Cylinder SAIJ100X280-40S
The AirTAC Airtac SAIJ100 Adjustable Cylinder SAIJ100X280-40S 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 SAIJ100X280-40S
The AirTAC SAIJ100X280-40-S is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster, delivering 3927N of push force at 0.5 MPa. It features a carbon steel rod and a PT tapered port thread. Because of the 40mm adjustment code, the usable travel window spans from 240mm to 280mm, allowing you to dial in the exact retract position without physically swapping the actuator.
This model includes a magnet (-S) for use with AirTAC CMSE reed and DMSE solid-state sensors housed in the dual-side barrel grooves. The rear adjuster acts purely as a mechanical stop to fine-tune the end position, meaning it does not hold the load if air pressure drops. For position-holding requirements without live pressure, consider the SAIL or BSAI series instead.
Airtac SAIJ100 Adjustable Cylinder SAIJ100X280-40S Technical Specifications
| Model | Airtac SAIJ100 Adjustable Cylinder SAIJ100X280-40S |
|---|---|
| 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 SAIJ100X280-40S
| 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 SAIJ100X280-40S Is Used
Machine Changeover
Dial in the 240-280mm travel window during product size changes without bolting on external stops or swapping the cylinder.
End-Position Tuning
Fine-tune the retract end-stop at commissioning using the rear screw to perfect part seating or clamping accuracy.
High-Force Positioning
Leverage 7068N of push force at 0.9 MPa to move heavy assemblies while retaining the ability to trim the stroke by up to 40mm.
Is the Airtac SAIJ100 Adjustable Cylinder SAIJ100X280-40S the Right Cylinder?
Select this 100mm bore actuator when an application requires high thrust (up to 801 kgf at 1.0 MPa) alongside precise end-stop tuning during commissioning. If your process needs less force, stepping down to an 80mm bore yields 2513N of push force at 0.5 MPa. The adjustable stroke is ideal for product changeovers on a line where the retract distance varies by up to 40mm. To replace an ISO 15552 cylinder, match the 100mm bore, 280mm stroke, 40mm adjustment, PT port, and -S magnet.
Because the 280mm stroke is substantial, the 25mm rod diameter helps manage side loads, but an external guide is still recommended for unsupported loads. The SAIJ mounting set includes Basic, FA, LB, TC, FTC, TCM1, and TCM2, omitting FB, CA, CB, and CR options.
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 SAIJ100X280-40S FAQ
The rear adjuster acts as a mechanical stop that lets you shorten the nominal 280mm stroke by up to 40mm, creating a usable travel window of 240-280mm. It only sets the travel end and does not lock or hold the load without live air pressure.
At 0.5 MPa it provides 3927N of push force and 3681N of pull force. At 0.9 MPa, the push force increases to 7068N, making it suitable for heavy-duty positioning tasks.
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