Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX125-40
The AirTAC Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX125-40 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø63mm bore and 125mm 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
- Stroke125 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM16×1.5
- CushionAdjustable, 36 mm
About the Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX125-40
The AirTAC SAIJ63X125-40 is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster, enabling a usable travel window of 85 to 125 mm. Delivering a pull force of 1402 N at 0.5 MPa, it is built with a SUS420J2 stainless steel rod for enhanced durability against lateral stress. The extruded aluminum barrel features sensor grooves on both sides for flexible mounting of CMSE and DMSE switches.
This adjustable-stroke model allows precise end-position tuning during commissioning without swapping the cylinder or adding external stops. It operates at speeds of 30-800 mm/s, uses a PT G3/8 port, and includes adjustable air cushions at both ends. Note that the rear adjuster acts as a travel stop, not a lock; for load-holding without live air pressure, consider the SAIL or BSAI series.
Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX125-40 Technical Specifications
| Model | Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX125-40 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø63 mm |
| Stroke | 125 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 SAIJ63AX125-40
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 63 | Bore size in mm. |
| ×125 | 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 SAIJ63AX125-40 Is Used
Machine Setup Tuning
Dial in the exact retract position within the 85-125 mm window during initial commissioning without installing external stopper blocks.
Product Changeover
Quickly adapt end-stops for varying product sizes on a packaging line by adjusting the rear screw up to 40 mm.
Assembly Clamping
Apply up to 1559 N of push force at 0.5 MPa for clamping parts, fine-tuning the travel to prevent over-travel.
Is the Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX125-40 the Right Cylinder?
Choose this 63 mm bore when you need more thrust than the 50 mm version (825 N pull at 0.5 MPa) but want a smaller footprint than the 80 mm option (2268 N pull). The 40 mm adjustment range is ideal for product changeovers requiring variable end-stops, whereas a fixed SAI cylinder lacks this flexibility. For exact ISO 15552 replacement, match the 125 mm stroke, 40 mm adjustment, PT G3/8 port, Basic/FA/LB/TC/FTC/TCM1/TCM2 mounting, and no magnet. As the stroke is under 300 mm, side-load concerns are minimal, though external guides are recommended for heavy loads.
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 SAIJ63AX125-40 FAQ
At 0.5 MPa, it provides 1559 N of push force and 1402 N of pull force. At 0.7 MPa, the push force increases to 2182 N.
The rear adjuster screw lets you mechanically shorten the effective stroke by up to 40 mm, creating a usable travel window of 85 to 125 mm. It acts as a travel stop and does not hold the load without live air.
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