Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX325-20
The AirTAC Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX325-20 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 SAIJ63AX325-20
The AirTAC SAIJ63X325-20 is a double-acting, single-rod ISO 15552 profile cylinder equipped with a rear stroke adjuster. It features a 325 mm nominal stroke that can be dialed back by up to 20 mm, yielding a usable travel window of 305-325 mm. This allows precise end-position tuning at commissioning without swapping the cylinder or adding external stops. The bore delivers 2182 N of push force at 0.7 MPa.
This model incorporates an SUS420J2 stainless steel rod (material code A) for enhanced corrosion resistance and uses PT tapered port threads with a G3/8 connection. The extruded aluminum barrel includes sensor grooves on both sides. Note that the rear adjuster acts purely as a mechanical stop to set the travel end alongside the air cushion; it does not hold the load without live air pressure.
Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX325-20 Technical Specifications
| Model | Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX325-20 |
|---|---|
| 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 SAIJ63AX325-20
| 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 SAIJ63AX325-20 Is Used
Product Changeover
Dial in the 305-325 mm travel window during format changes on packaging lines, avoiding the need to physically swap out the entire cylinder for different product sizes.
End-Position Tuning
Fine-tune the retract end-position during machine commissioning to achieve exact mechanical alignment without machining external stopper blocks.
Extended Reach Actuation
Utilize the 325 mm stroke for transferring parts between conveyor zones, relying on the SUS420J2 rod to withstand minor environmental moisture.
Is the Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX325-20 the Right Cylinder?
Choose this 63 mm bore when you need 1559 N push force at 0.5 MPa, stepping up from a 50 mm bore (982 N) or down from an 80 mm bore (2513 N). The adjustable stroke is ideal for product-size changeovers on a line, providing a variable end-stop that a fixed SAI cylinder cannot. Because the nominal stroke is 325 mm, an external guide is recommended to handle side loading and prevent rod binding over the extended travel.
To match this ISO 15552 dimensionally interchangeable cylinder for replacement, verify the 325 mm stroke, 20 mm adjustment range, PT G3/8 port, and mounting style. SAIJ supports Basic, FA, LB, TC, FTC, TCM1, and TCM2 mounts, omitting FB, CA, CB, and CR. If your application requires true load holding without live air, consider the SAIL or BSAI series instead of relying on the adjuster.
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 SAIJ63AX325-20 FAQ
At 0.5 MPa, it provides 1559 N of push force and 1402 N of pull force. At 0.7 MPa, the push force increases to 2182 N. The maximum operating pressure is 1.0 MPa.
The rear adjuster screw lets you shorten the 325 mm nominal stroke by up to 20 mm, creating a 305-325 mm travel window. It functions as a mechanical stop and does not lock the load without continuous air pressure.
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