Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX350-50
The AirTAC Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX350-50 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 SAIJ63AX350-50
The AirTAC SAIJ63X350-50 is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster that creates a 300-350 mm usable travel window. Delivering 1559 N of push force at 0.5 MPa, it is built with a SUS420J2 stainless steel rod and PT tapered ports. The extruded aluminum barrel includes sensor grooves on both sides for flexible switch placement.
This model allows precise end-position tuning during commissioning without swapping the cylinder or adding external stops. The rear screw acts purely as a travel stop to set the retraction point and relies on the integrated air cushion for deceleration; it does not hold the load without live air pressure.
Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX350-50 Technical Specifications
| Model | Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX350-50 |
|---|---|
| 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 SAIJ63AX350-50
| 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 SAIJ63AX350-50 Is Used
Product Changeovers
Dial in the 300-350 mm travel window during format size changes on packaging lines without physically replacing the actuator.
End-Position Tuning
Fine-tune the exact retract distance during machine commissioning to perfect seating or clamping forces.
Variable Stops
Provide an adjustable physical stop for diverter arms or pusher plates where the exact end position varies by production run.
Is the Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX350-50 the Right Cylinder?
Choose this 63 mm bore when a 50 mm bore provides insufficient thrust (982 N push at 0.5 MPa) but an 80 mm bore is excessive (2513 N push). The adjustable 300-350 mm window is ideal for product changeovers on a line, whereas a fixed SAI cylinder locks you into a single exact dimension. To replace an ISO 15552 cylinder, match the 63 mm bore, 350 mm nominal stroke, 50 mm adjuster, PT ports, and mounting set.
Because the 350 mm stroke is substantial, the 20 mm rod diameter and M16x1.5 thread will still require an external guide to prevent excessive side-loading on long unsupported extensions. For applications requiring the load to be held mechanically without continuous air pressure, select a SAIL or BSAI lock cylinder instead.
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 SAIJ63AX350-50 FAQ
At 0.5 MPa it provides 1559 N of push force and 1402 N of pull force. If you need higher force, stepping up to an 80 mm bore yields 2513 N at the same pressure.
The rear adjuster screw lets you trim the effective stroke back by up to 50 mm, creating a 300-350 mm travel window. It functions as a mechanical stop and does not lock the load without live air.
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