Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX280-20S
The AirTAC Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX280-20S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø63mm bore and 280mm stroke, G3/8 air ports and adjustable end cushioning. Its standardized mounting interface makes it a drop-in replacement for other ISO 15552 cylinders in automation lines.
- BoreØ63 mm
- Stroke280 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM16×1.5
- CushionAdjustable, 36 mm
About the Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX280-20S
The AirTAC SAIJ63X280-20-S is a double-acting ISO 15552 profile cylinder featuring a rear-mounted stroke adjuster. It provides a 260-280mm usable travel window, allowing you to dial back the nominal 280mm stroke by up to 20mm during commissioning. Delivering a 1559N pull force at 0.5MPa, it is built with a SUS420J2 stainless steel rod and includes a magnet for position sensing.
This model uses PT tapered ports and supports AirTAC CMSE reed and DMSE electronic sensors via its dual-side barrel grooves. The rear adjuster acts purely as a mechanical stop to set the end position; it does not hold the load without live air. For load-holding requirements, consider the SAIL or BSAI series instead.
Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX280-20S Technical Specifications
| Model | Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX280-20S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø63 mm |
| Stroke | 280 mm |
| Acting type | Double acting |
| Port size | G3/8 |
| Rod thread | M16×1.5 |
| 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 (Ø63mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 1559 N | 1402 N |
| 0.7 MPa | 2182 N | — |
| Max (@1.0 MPa) | 318 kgf | |
Actual usable force is lower than theoretical due to friction and back-pressure. Size with a safety margin.
Model Code: Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX280-20S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 63 | 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 SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX280-20S Is Used
Machine Changeovers
Fine-tune the 260-280mm travel window during product size transitions without swapping the cylinder or bolting on external stoppers.
Variable End Stops
Dial in the exact retract position on packaging lines to accommodate different carton sizes on the fly.
Assembly Calibration
Set precise end-of-stroke positions during initial commissioning to perfectly time part placement and pressing operations.
Is the Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX280-20S the Right Cylinder?
Choose this 63mm bore cylinder when your application requires 1559N pull force at 0.5MPa and on-the-fly end-position tuning without adding external stops. If your setup demands less force, the 50mm bore provides 825N pull; if you need more, the 80mm bore offers 2268N pull. The adjustable stroke is ideal for machine changeovers, whereas a fixed SAI cylinder suits dedicated single-purpose lines.
Because the 280mm stroke is relatively long, the 20mm piston rod and M16x1.5 thread provide robust support, but an external guide rail is recommended to prevent excessive side loading. Ensure your ISO 15552 replacement matches the 63mm bore, 280mm stroke, PT G3/8 ports, and the SAIJ mounting set (Basic, FA, LB, TC, FTC, TCM1, TCM2).
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 SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX280-20S FAQ
The rear adjuster screw lets you shorten the effective stroke by up to 20mm, creating a 260-280mm usable travel window. It acts as a mechanical stop for end-position tuning and does not lock or hold the load without continuous air pressure.
At 0.5MPa it provides 1559N pull force and 2182N push force. At 0.7MPa, the push force increases to 2805N. The maximum operating pressure is 1.0MPa.
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