Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX375-75
The AirTAC Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX375-75 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø63mm bore and 375mm 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
- Stroke375 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM16×1.5
- CushionAdjustable, 36 mm
About the Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX375-75
The AirTAC SAIJ63X375-75 is a double-acting ISO 15552 profile cylinder featuring a rear-mounted stroke adjuster. It provides a 300-375 mm usable travel window, allowing you to dial back the retract end-position by up to 75 mm during machine setup. In the 63 mm bore class, it delivers 1559 N of pull force at 0.5 MPa and up to 318 kgf at 1.0 MPa.
This variant uses a SUS420J2 stainless steel rod for enhanced corrosion resistance and features PT tapered port threads. The extruded aluminum barrel includes sensor grooves on both sides for flexible switch mounting. The rear adjuster acts purely as a mechanical stop to set the end-of-travel position and does not hold the load without continuous air pressure.
Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX375-75 Technical Specifications
| Model | Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX375-75 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø63 mm |
| Stroke | 375 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 SAIJ63AX375-75
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 63 | Bore size in mm. |
| ×375 | 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 SAIJ63AX375-75 Is Used
Variable Retract Stops
Dial in the exact 300-375 mm retract position during commissioning to accommodate different material lengths without adding external stops.
Product Changeover
Quickly adjust the end-of-stroke on automated lines when switching between product sizes, reducing machine setup downtime.
Machine Setup
Fine-tune the final resting position of the rod during assembly machine calibration to ensure precise component placement.
Is the Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX375-75 the Right Cylinder?
Choose this 63 mm bore model when your application requires 1559 N of pull force at 0.5 MPa and significant end-position flexibility. If you need less force, the 50 mm bore offers 825 N of pull force, while stepping up to the 80 mm bore provides 2268 N. The 75 mm adjustment range is ideal for accommodating multiple product sizes on a single line without swapping cylinders. For load-holding requirements without live air pressure, consider the SAIL or BSAI series instead, as the SAIJ adjuster is not a locking mechanism.
Because the 375 mm stroke is relatively long, the 20 mm diameter rod is susceptible to side-loading; an external guide should be used to prevent rod binding. This cylinder is dimensionally interchangeable per ISO 15552 and supports a reduced mounting set (Basic, FA, LB, TC, FTC, TCM1, TCM2). It operates at speeds of 30-800 mm/s and uses a G3/8 port.
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 SAIJ63AX375-75 FAQ
At a 0.5 MPa operating pressure, this 63 mm bore cylinder provides 1559 N of pull force and 2182 N of push force. At the maximum 1.0 MPa pressure, it delivers up to 318 kgf.
The rear adjuster screw allows you to shorten the nominal 375 mm stroke by up to 75 mm, creating a 300-375 mm usable travel window. It functions as a mechanical stop to fine-tune the end position and does not lock the load without air pressure.
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