Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX350-20S
The AirTAC Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX350-20S 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 SAIJ63AX350-20S
The AirTAC SAIJ63X350-20-S is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster. It provides a nominal 350mm stroke that can be dialed back by up to 20mm, yielding a 330-350mm usable travel window. This specific configuration delivers 1559N of pull force at 0.5MPa and uses a SUS420J2 stainless steel rod for enhanced corrosion resistance.
Equipped with a magnet for position sensing, it supports AirTAC CMSE reed and DMSE electronic switches. The integrated PT tapered port threads ensure a tight pneumatic seal. Because the stroke is 350mm, the 20mm diameter piston rod will experience leverage forces under load, making an external guide rail advisable to prevent side-load wear on the seals.
Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX350-20S Technical Specifications
| Model | Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX350-20S |
|---|---|
| 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 SAIJ63AX350-20S
| 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 SAIJ63AX350-20S Is Used
Machine Setup Changeover
Fine-tune the 330-350mm travel window during line changeovers to accommodate slightly different product lengths without replacing the actuator.
Variable End-Stop Positioning
Dial in the exact retraction point on a packaging conveyor to align items precisely, using the rear screw to trim the final 20mm of travel.
Automated Assembly Calibration
Adjust the stroke end-point during initial commissioning to set the perfect pressing depth for 63mm bore assembly operations.
Is the Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX350-20S the Right Cylinder?
Choose this adjustable cylinder when a process requires exact end-position tuning at commissioning or during product changeover, avoiding the need to physically swap cylinders or bolt on external stops. If you need higher force, stepping up to the 80mm bore yields 2268N of pull at 0.5MPa; stepping down to the 50mm bore gives 825N. The rear adjuster acts strictly as a travel stop and does not hold the load without live air. For fail-safe load holding, select the SAIL or BSAI series. This SAIJ model is dimensionally interchangeable per ISO 15552 and uses a reduced mounting set (Basic, FA, LB, TC, FTC, TCM1, TCM2).
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 SAIJ63AX350-20S FAQ
The rear adjuster acts as a mechanical stop that lets you shorten the effective stroke by up to 20mm. This gives the 350mm nominal stroke a usable travel window of 330-350mm, allowing fine-tuning at commissioning without swapping the cylinder.
At 0.5MPa operating pressure, this 63mm bore cylinder provides 1559N of pull force and 2182N of push force. It operates safely within a 0.15-1.0MPa pressure range.
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