Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX325-100
The AirTAC Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX325-100 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 SAIJ63AX325-100
The AirTAC SAIJ63X325-100 is a double-acting ISO 15552 profile cylinder featuring a rear-mounted stroke adjuster. It provides a nominal 325 mm stroke that can be dialed back by up to 100 mm, yielding a usable travel window of 225-325 mm for precise end-position tuning during commissioning. Equipped with a G3/8 port and a 20 mm rod, it delivers 1559 N of pull force at 0.5 MPa.
This configuration utilizes a SUS420J2 stainless steel rod (option A) for enhanced corrosion resistance compared to standard carbon steel. The extruded aluminum barrel includes sensor grooves on both sides, though this specific SKU omits the magnet, meaning external position sensing via CMSE or DMSE switches is not supported without modification. The rear adjuster acts strictly as a mechanical stop to set the travel end and does not lock the load without continuous live air pressure.
Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX325-100 Technical Specifications
| Model | Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX325-100 |
|---|---|
| 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 SAIJ63AX325-100
| 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 SAIJ63AX325-100 Is Used
Product Changeover Tuning
Dial in the exact end-position from 225 to 325 mm during format size changes on a packaging line without replacing hardware.
Variable End-Stop Diverter
Adjust the stroke on the fly to divert packages of varying lengths, using the rear screw to set the precise retraction point.
Machine Setup Commissioning
Fine-tune the travel limit during initial machine commissioning to prevent mechanical crashes before locking down the final position.
Is the Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX325-100 the Right Cylinder?
Selecting this 63 mm bore cylinder makes sense when your application requires 1559 N pull force at 0.5 MPa, bridging the gap between the 50 mm bore (825 N pull) and the 80 mm bore (2268 N pull). The 100 mm adjustment range is ideal for product-size changeovers on a line, allowing you to shift the end-stop without swapping the cylinder or adding external stops. If your process requires the load to be held mechanically without air pressure, you must look to the SAIL (air-released lock) or BSAI (clamp-lock) variants, as the SAIJ adjuster is not a brake.
When replacing an ISO 15552 cylinder, match the 63 mm bore, 325 mm stroke, PT tapered port threads, and the reduced SAIJ mounting set (Basic, FA, LB, TC, FTC, TCM1, TCM2), noting that FB, CA, CB, and CR mounts are omitted. Because this is a 325 mm stroke, the unsupported piston rod is susceptible to deflection; ensure you use an external guide to prevent excessive side-loading, despite the robust 20 mm rod diameter and M16x1.25 rod thread.
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 SAIJ63AX325-100 FAQ
At 0.5 MPa operating pressure, this 63 mm bore cylinder generates 1559 N of pull force and 2182 N of push force. At the maximum 1.0 MPa pressure, it can achieve up to 318 kgf.
The rear adjuster screw allows you to mechanically shorten the 325 mm nominal stroke by up to 100 mm, providing an effective travel window of 225-325 mm. The adjuster functions only as a travel stop and does not hold the load without live air pressure.
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