Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX400-75
The AirTAC Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX400-75 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø63mm bore and 400mm 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
- Stroke400 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM16×1.5
- CushionAdjustable, 36 mm
About the Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX400-75
The AirTAC SAIJ63X400-75 is a double-acting, single-rod ISO 15552 profile cylinder equipped with a rear stroke adjuster. It features a 400 mm nominal stroke that can be dialed back by up to 75 mm, providing a precise 325-400 mm usable travel window for fine-tuning end positions during commissioning. With a 63 mm bore, it delivers 1559 N of pull force at 0.5 MPa and operates at speeds between 30-800 mm/s.
This model is built with an SUS420J2 stainless steel rod (material code A) for enhanced corrosion resistance and features PT tapered port threads (G3/8). The extruded aluminum barrel includes sensor grooves on both sides. If position holding is required without live air pressure, note that the rear adjuster functions strictly as a travel stop, not a lock; you would need to specify an SAIL or BSAI cylinder instead.
Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX400-75 Technical Specifications
| Model | Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX400-75 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø63 mm |
| Stroke | 400 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 SAIJ63AX400-75
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 63 | Bore size in mm. |
| ×400 | 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 SAIJ63AX400-75 Is Used
Machine Changeover
Dial in the 325-400 mm travel window during product size changes without physically swapping cylinders or repositioning external hard stops.
End-Position Tuning
Fine-tune the retract end position at commissioning to perfect seating or clamping depth, absorbing mechanical tolerances easily.
Variable Diverter Stroke
Adjust the stroke length on a sorting diverter arm on the fly to accommodate different package sizes moving down the line.
Is the Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX400-75 the Right Cylinder?
Choose this 63 mm bore adjustable-stroke cylinder when your application requires 1559 N pull force at 0.5 MPa but demands variable end-stops for product changeovers. If you need less force, the 50 mm bore offers 825 N pull; if you need more, step up to the 80 mm bore for 2268 N. The adjustable rear screw allows you to trim the 400 mm stroke back by up to 75 mm without adding external stops or swapping the cylinder.
Because this cylinder features a 400 mm stroke, the M16x1.5 rod should be adequately supported to prevent excessive side-loading and binding over longer travels. As a true ISO 15552 profile cylinder, it is dimensionally interchangeable with standard ISO 15552 mounting footprints. It supports a mounting subset of Basic, FA, LB, TC, FTC, TCM1, and TCM2, omitting FB, CA, CB, and CR options. This SKU does not include a magnet; adding the -S suffix enables CMSE reed and DMSE electronic sensor compatibility.
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 SAIJ63AX400-75 FAQ
At 0.5 MPa operating pressure, this 63 mm bore cylinder provides 1559 N of pull force and 1559 N of push force. At the maximum 1.0 MPa pressure, it achieves 318 kgf.
The rear adjuster screw acts as a mechanical stop, allowing you to shorten the 400 mm nominal stroke by up to 75 mm. This creates a usable travel window of 325-400 mm. Note that it is a stop, not a lock, and cannot hold the load without continuous air pressure.
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