Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX350-40
The AirTAC Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX350-40 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø63mm bore and 350mm 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
- Stroke350 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM16×1.5
- CushionAdjustable, 36 mm
About the Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX350-40
The AirTAC SAIJ63X350-40 is a double-acting ISO 15552 profile cylinder featuring a rear-mounted stroke adjuster that permits a usable travel window of 310 to 350 mm. By dialing the stopper up to 40 mm, you can fine-tune the retract end-position at commissioning without swapping out the unit or adding external stops. The extruded aluminum barrel integrates sensor grooves on three sides for flexible switch placement.
Delivering 1559 N of pull force at 0.5 MPa and 2182 N at 0.7 MPa, this bore size handles substantial workloads. The piston rod utilizes SUS420J2 stainless steel for superior corrosion resistance, and the PT tapered port threads ensure a tight, reliable pneumatic connection. The rear adjuster acts purely as a travel stop to set the end-position and deceleration, meaning it will not hold a load without continuous live air pressure.
Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX350-40 Technical Specifications
| Model | Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX350-40 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø63 mm |
| Stroke | 350 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 SAIJ63AX350-40
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 63 | Bore size in mm. |
| ×350 | 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 SAIJ63AX350-40 Is Used
Product Changeovers
Dial in the 40 mm adjustment window to rapidly switch end-stops for different product lengths on a single production line without changing hardware.
Commissioning Calibration
Fine-tune the exact retract position during machine setup to achieve perfect alignment, avoiding the need to add external shims or custom spacers.
Variable End-Stop Forming
Set precise bottoming positions for press or forming operations where the material thickness or desired crush distance varies slightly between batches.
Is the Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX350-40 the Right Cylinder?
Choose this 63 mm bore when your application requires more force than the 50 mm version (which provides 825 N pull at 0.5 MPa) but does not warrant the larger 80 mm footprint (2268 N pull at 0.5 MPa). The adjustable stroke is ideal for machines that undergo product changeovers, allowing you to reposition the end-stop precisely without physically replacing the cylinder. For operations needing true load-holding without live air pressure, a standard SAIJ is insufficient; consider the AirTAC SAIL or BSAI series instead.
When replacing an ISO 15552 cylinder, verify the 63 mm bore, 350 mm nominal stroke, 40 mm adjustment range, PT port threads, and your required mounting bracket from the SAIJ subset (Basic, FA, LB, TC, FTC, TCM1, TCM2). Because the 350 mm stroke creates a long unsupported rod, an external guide mechanism is highly recommended to prevent excessive side-loading and premature seal wear.
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 SAIJ63AX350-40 FAQ
At 0.5 MPa it provides 1559 N of pull force and 1402 N of push force. At 0.7 MPa, the push force increases to 2182 N.
The rear adjuster screw lets you shorten the effective stroke by up to 40 mm, creating a usable travel window of 310 to 350 mm. It acts as a mechanical stop to tune the end position, but it is not a lock and will not hold the load without live air pressure.
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