Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX375-40S
The AirTAC Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX375-40S 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 SAIJ63AX375-40S
The AirTAC SAIJ63X375-40-S is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster that trims the effective travel to a 335-375 mm window. It delivers a robust 2182 N push force at 0.7 MPa, making it suitable for medium-duty positioning tasks. The extruded aluminum barrel includes sensor grooves on both sides for flexible switch mounting.
This variant uses an SUS420J2 stainless steel rod for improved corrosion resistance and includes a magnet for CMSE or DMSE sensors. The PT tapered port is G3/8. Because the stroke exceeds 300 mm, the 20 mm rod diameter and M16x1.5 thread provide structural support, but an external guide is recommended to manage side loads on long unsupported travels.
Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX375-40S Technical Specifications
| Model | Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX375-40S |
|---|---|
| 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 SAIJ63AX375-40S
| 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 SAIJ63AX375-40S Is Used
Machine Changeover
Dial in the exact retract distance within the 335-375 mm window during product size transitions without changing hardware.
End-Stop Tuning
Fine-tune the final end position during initial commissioning to perfect a process without adding external mechanical stops.
Variable Positioning
Adapt the cylinder travel on automated lines where multiple end positions are required for different assembly tasks.
Is the Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX375-40S the Right Cylinder?
Choose this 63 mm bore when a 50 mm bore (982 N push at 0.5 MPa) is insufficient but an 80 mm bore (2513 N at 0.5 MPa) is oversized. The 40 mm adjustment range allows you to fine-tune the retract end-position during commissioning or product changeover without swapping the cylinder or adding external stops. Unlike a fixed SAI cylinder, this adjustable variant accommodates variable end-stops on the fly.
For load-holding without live air pressure, note that the rear adjuster functions strictly as a travel stop, not a lock. You must use a SAIL pneumatic lock, a BSAI clamp-lock, or an external pilot-operated check valve. This SAIJ model is dimensionally interchangeable per ISO 15552 and supports Basic, FA, LB, TC, FTC, TCM1, and TCM2 mounts.
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 SAIJ63AX375-40S FAQ
At 0.7 MPa operating pressure, this 63 mm bore cylinder generates a push force of 2182 N and a pull force of 1402 N. At 0.5 MPa, it provides 1559 N push and 1402 N pull.
The rear adjuster screw lets you shorten the nominal 375 mm stroke by up to 40 mm, providing a usable travel window of 335 to 375 mm. It acts as a mechanical stop to set the position and is not a lock.
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