Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX325-75
The AirTAC Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX325-75 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø63mm bore and 325mm 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
- Stroke325 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM16×1.5
- CushionAdjustable, 36 mm
About the Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX325-75
The AirTAC SAIJ63X325-75 is a double-acting, single-rod ISO 15552 profile cylinder equipped with a rear stroke adjuster. It delivers 1559 N of pull force at 0.5 MPa and features a 325 mm nominal stroke that can be dialed back by up to 75 mm, creating a precise 250-325 mm usable travel window for product changeovers. The extruded aluminum barrel includes sensor grooves on both sides for flexible switch mounting.
This variant uses a SUS420J2 stainless steel rod (option A) for superior corrosion resistance compared to standard carbon steel. The G3/8 port and M16x1.5 rod thread handle robust pneumatic flows and side loads, while the rear adjuster acts strictly as a travel stop to fine-tune the retract end position without adding external stops.
Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX325-75 Technical Specifications
| Model | Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX325-75 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø63 mm |
| Stroke | 325 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 SAIJ63AX325-75
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 63 | Bore size in mm. |
| ×325 | 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 SAIJ63AX325-75 Is Used
Variable End-Stop Machining
Dial in the 250-325 mm retract position precisely during machine setup to accommodate changing part dimensions without swapping cylinders.
Product Changeover Diverter
Quickly adjust the stroke by up to 75 mm to handle different package sizes on a packaging line, ensuring proper diverting distances.
Commissioning Fine-Tuning
Fine-tune the end-of-stroke position during initial equipment commissioning to avoid mechanical interferences and optimize cycle timing.
Is the Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX325-75 the Right Cylinder?
Choose this 63 mm bore when an application requires 1559 N pull force at 0.5 MPa, bridging the gap between the 982 N pull of a 50 mm bore and the 2268 N pull of an 80 mm bore. An adjustable stroke is selected over a fixed SAI cylinder when machinery requires variable end-stops for commissioning or accommodating different product sizes on the same line. The PT tapered port thread ensures a tight, reliable pneumatic seal.
Because the 325 mm stroke is substantial, an external guide should support the load to prevent excessive side-loading on the rod. Remember that the rear adjuster and air cushions only decelerate the travel end; they do not hold the load without live air. For secure load-holding without pressure, use an AirTAC SAIL or BSAI cylinder. This profile cylinder is dimensionally interchangeable per ISO 15552.
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 SAIJ63AX325-75 FAQ
At 0.5 MPa, this 63 mm bore cylinder provides 1559 N of pull force and 2182 N of push force. At the maximum operating pressure of 1.0 MPa, it delivers up to 318 kgf.
The rear adjuster screw allows you to shorten the 325 mm nominal stroke by up to 75 mm, providing a usable travel window of 250-325 mm. The adjuster acts as a mechanical stop and does not lock the load without live air pressure.
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