Airtac SAIJ100 Adjustable Cylinder SAIJ100AX280-20
The AirTAC SAIJ100 Adjustable Cylinder SAIJ100AX280-20 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 interchangeable with other ISO 15552 cylinders at the mounting interface.
- BoreØ100 mm
- Stroke280 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM20×1.5
- CushionAdjustable, 36 mm
- No minimum order. A single piece can be ordered.
- Ready in 3–5 business days. That is the time we take to process the order and hand it to the carrier. Transit time after that depends on the destination.
About the Airtac SAIJ100 Adjustable Cylinder SAIJ100AX280-20
The AirTAC SAIJ100X280-20 is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster, delivering robust performance with a 100 mm bore. It features a nominal 280 mm stroke that can be fine-tuned backward by up to 20 mm, providing a precise 260-280 mm usable travel window. This adjustability allows operators to dial in end positions during commissioning without swapping out the cylinder or adding external stops. Built with a SUS420J2 stainless steel rod (option A) and PT tapered ports, it handles heavy loads with a maximum push force of 801 kgf at 1.0 MPa.
This model incorporates an extruded aluminum barrel with sensor grooves on both sides for flexible mounting of CMSE reed or DMSE electronic sensors. The rear adjuster functions purely as a mechanical stop to set the travel end and deceleration point alongside the variable air cushions; it does not hold the load without live air pressure. For applications requiring true position holding, consider the SAIL or BSAI series instead. The SAIJ utilizes a specific mounting subset including Basic, FA, LB, TC, FTC, TCM1, and TCM2.
Airtac SAIJ100 Adjustable Cylinder SAIJ100AX280-20 Technical Specifications
| Model | Airtac SAIJ100 Adjustable Cylinder SAIJ100AX280-20 |
|---|---|
| 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 | 3682 N | 3682 N |
| 0.7 MPa | 5154 N | — |
| Max (@1.0 MPa) | 751 kgf | |
Double-rod model: the rod passes through the rear cover, so both piston faces lose rod area and push is shown at the annular-area value. Actual usable force is lower than theoretical due to friction and back-pressure. Size with a safety margin.
Model Code: Airtac SAIJ100 Adjustable Cylinder SAIJ100AX280-20
| 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 SAIJ100AX280-20 Is Used
Machine Changeover
Quickly adjust the 260-280 mm travel window during product size transitions on packaging lines without replacing the cylinder or bolting on external stops.
End-Position Tuning
Fine-tune the retract end-stop during initial commissioning to dial in exact mechanical positioning, compensating for minor mounting variances.
Is the Airtac SAIJ100 Adjustable Cylinder SAIJ100AX280-20 the Right Cylinder?
If your setup demands less force, stepping down to an 80 mm bore yields 2513 N at 0.5 MPa, whereas moving up to a 125 mm bore provides 6136 N. Choose the SAIJ adjustable-stroke variant over a fixed SAI model when you need variable end stops for product-size changeovers or machine setup refinements.
When replacing an ISO 15552 cylinder, verify the 100 mm bore, 280 mm stroke, 20 mm adjustment range, PT G1/2 port, and the appropriate mounting option. Because the stroke is 280 mm, ensure adequate support to prevent side-loading; while the 25 mm rod and M20x1.5 thread handle significant loads, long unsupported strokes still require an external guide. Note that a plain SAIJ does not hold its position without live air—the rear adjuster is a travel stop, not a lock.
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 SAIJ100AX280-20 FAQ
The maximum push force is 801 kgf at 1.0 MPa.
The rear adjuster acts as a mechanical stop that allows you to shorten the effective travel from the nominal 280 mm down to 260 mm. It sets the travel end and deceleration point but does not lock or hold the load without live air pressure.
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