Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX125-40S
The AirTAC Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX125-40S 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 SAIJ63AX125-40S
The AirTAC SAIJ63X125-40-S is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster. It provides a usable travel window of 85-125 mm, allowing you to dial back the nominal 125 mm stroke by up to 40 mm. Operating at 0.5 MPa, it generates 1559 N of push force and 1402 N of pull force.
This unit includes a magnetic piston (-S) for position sensing with CMSE reed and DMSE electronic sensors. It features an SUS420J2 stainless steel rod (option A) for corrosion resistance and uses PT tapered port threads. The rear adjuster acts strictly as a travel stop for end-position tuning, not a lock, meaning live air pressure is required to hold the load.
Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX125-40S Technical Specifications
| Model | Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX125-40S |
|---|---|
| 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 SAIJ63AX125-40S
| 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 SAIJ63AX125-40S Is Used
Stroke Tuning
Dial in the exact 85 to 125 mm end-position during commissioning without replacing the entire cylinder.
Product Changeover
Quickly adjust the retract stop to accommodate varying product sizes on a single production line.
Machine Setup
Use the 40 mm adjustment range to set precise mechanical limits during initial equipment assembly.
Is the Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX125-40S the Right Cylinder?
Choose this 63 mm bore when you need higher thrust than a 50 mm bore (982 N push at 0.5 MPa) but less bulk than an 80 mm bore (2513 N push). The adjustable stroke is ideal for machine changeovers, letting you fine-tune the end-stop without swapping cylinders or adding external stops. For load-holding without continuous air pressure, consider an AirTAC SAIL or BSAI cylinder instead. This SAIJ model uses a reduced mounting set (Basic, FA, LB, TC, FTC, TCM1, TCM2) and is dimensionally interchangeable with ISO 15552 profile cylinders.
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 SAIJ63AX125-40S FAQ
At 0.5 MPa it provides 1559 N push and 1402 N pull force. At 0.7 MPa the push force increases to 2182 N.
The rear adjuster lets you shorten the 125 mm stroke by up to 40 mm, creating an 85 to 125 mm travel window for fine-tuning without external stops.
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Covers non-human-caused product damage.
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