Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX125-30S
The AirTAC Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX125-30S 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 SAIJ63AX125-30S
The AirTAC SAIJ63X125-30-S is a double-acting, single-rod ISO 15552 profile cylinder equipped with a rear stroke adjuster. It provides a 125 mm nominal stroke that can be dialed back by up to 30 mm, yielding a highly versatile 95-125 mm usable travel window for fine-tuning end positions during commissioning. Belonging to the 63 mm bore class, it delivers a robust 1402 N pull force at 0.5 MPa and up to 2805 N push force at 0.9 MPa.
This specific SKU is configured with an SUS420J2 stainless steel rod (code A) for enhanced corrosion resistance and includes a built-in magnet (-S) for position sensing. The sensor groove on both sides of the extruded aluminum barrel accommodates AirTAC CMSE reed and DMSE electronic solid-state switches. It features PT tapered port threads (G3/8) and uses a reduced mounting interface set consisting of Basic, FA, LB, TC, FTC, TCM1, and TCM2.
Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX125-30S Technical Specifications
| Model | Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX125-30S |
|---|---|
| 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 SAIJ63AX125-30S
| 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 SAIJ63AX125-30S Is Used
Variable End-Stop Tuning
Dial the stroke back by up to 30 mm to precisely set the retract end-position during machine commissioning or when adjusting for minor mechanical clearances.
Product Size Changeovers
Quickly adapt the 95-125 mm travel window on automated lines to accommodate varying product lengths without replacing the entire actuator.
Sensor-Ready Positioning
Leverage the built-in magnet and dual sensor grooves with CMSE or DMSE switches to confirm end-of-travel positions across the adjusted stroke range.
Is the Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX125-30S the Right Cylinder?
Choose this 63 mm bore adjustable cylinder when your application requires variable end-stops or frequent product-size changeovers without physically swapping out the cylinder or adding external stops. If your thrust requirements are lower, stepping down to a 50 mm bore yields 825 N pull force at 0.5 MPa, while stepping up to an 80 mm bore provides 2268 N pull force for heavier loads. The 20 mm rod diameter and M16x1.5 rod thread offer substantial rigidity, but for this 125 mm stroke, ensuring proper external guiding is still recommended to prevent excessive side-loading.
The rear adjuster acts purely as a mechanical travel stop and works alongside the variable air cushions at both ends to decelerate the piston. It does not hold the load or maintain position without continuous live air pressure. For true load-holding requirements without air pressure, consider the SAIL (air-released lock) or BSAI (clamp-lock) cylinder series. To replace an ISO 15552 cylinder, match the 63 mm bore, 125 mm stroke, 30 mm adjustment, PT G3/8 port, and the desired mounting and magnet options.
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 SAIJ63AX125-30S FAQ
At a 0.5 MPa operating pressure, this 63 mm bore cylinder generates 1559 N of push force and 1402 N of pull force. At 0.9 MPa, the push force increases to 2805 N.
The rear adjuster screw allows you to shorten the 125 mm nominal stroke by up to 30 mm, creating a 95-125 mm usable travel window. This stopper fine-tunes the end position but does not lock the load without live air pressure.
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