Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX325-40
The AirTAC Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX325-40 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 SAIJ63AX325-40
The AirTAC SAIJ63X325-40 is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster that allows you to fine-tune the end-of-travel position. Based on a 325 mm nominal stroke and a 40 mm adjustment code, the usable travel window is 285-325 mm. This enables precise end-position tuning at commissioning or during product changeovers without adding external stops or swapping the actuator. The 63 mm bore delivers 1559 N of push force at 0.5 MPa and 1402 N of pull force, placing it in a robust mid-range force class.
This model features a SUS420J2 stainless steel rod (option A) for improved corrosion resistance and uses a PT tapered port thread (G3/8). The extruded aluminum barrel includes sensor grooves on both sides for direct mounting of position switches. Because the 325 mm stroke leaves the rod relatively unsupported over a long distance, an external guide is recommended to prevent excessive side-load wear on the rod seals.
Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX325-40 Technical Specifications
| Model | Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX325-40 |
|---|---|
| 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 SAIJ63AX325-40
| 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 SAIJ63AX325-40 Is Used
Machine Setup Tuning
Dial in the exact 285-325 mm travel distance during equipment commissioning to perfect end-of-stroke positioning without external shims.
Product Changeover
Quickly adapt the cylinder's effective stroke on a packaging line when switching to a different product size, minimizing downtime.
Variable End Stops
Use the 40 mm rear adjustment range to set precise retract distances for multi-stage manufacturing processes on a single actuator.
Is the Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX325-40 the Right Cylinder?
Choose this 63 mm bore when a 50 mm bore (982 N push at 0.5 MPa) is too weak, but an 80 mm bore (2513 N) is overkill for your payload. The adjustable stroke is ideal for variable end-stops or machine setups requiring on-the-fly dimensional tweaks. The rear adjuster acts purely as a mechanical stop and cannot hold a load without live air pressure; for fail-safe load holding, select the SAIL or BSAI series instead. This SAIJ unit is dimensionally interchangeable per ISO 15552 and uses the reduced mounting set: Basic, FA, LB, TC, FTC, TCM1, and TCM2 (omitting FB, CA, CB, and CR).
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 SAIJ63AX325-40 FAQ
The nominal stroke is 325 mm, but the external rear adjusting screw lets you trim the retract travel back by up to 40 mm. This creates a usable travel window of 285-325 mm, allowing fine-tuning of the end position without replacing the cylinder.
At 0.5 MPa operating pressure, this 63 mm bore cylinder provides 1559 N of push force and 1402 N of pull force. At the maximum 1.0 MPa pressure, it can deliver up to 318 kgf of push force.
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