Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX125-50
The AirTAC Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX125-50 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 SAIJ63AX125-50
The AirTAC SAIJ63X125-50 is a double-acting ISO 15552 profile cylinder featuring a rear-mounted stroke adjuster. It provides a nominal 125 mm travel that can be fine-tuned down by up to 50 mm, yielding a usable end-position window of 75-125 mm. Equipped with a G3/8 port and a 20 mm rod, it delivers 1559 N of push force and 1402 N of pull force at 0.5 MPa.
This unit uses a SUS420J2 stainless steel rod (material code A) for enhanced corrosion resistance. The extruded aluminum barrel includes sensor grooves on both sides, though this specific SKU is configured without a magnet. The rear stopper allows precise end-position tuning during commissioning without adding external stops, while the variable air cushions at both ends manage deceleration.
Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX125-50 Technical Specifications
| Model | Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX125-50 |
|---|---|
| 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 SAIJ63AX125-50
| 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 SAIJ63AX125-50 Is Used
Product Changeovers
Quickly dial in the 75-125 mm stroke window during format changes on packaging lines without replacing the cylinder.
End-Position Tuning
Fine-tune the retract end-stop during machine commissioning to perfect part ejection without external mechanical stops.
Adjustable Clamping
Accommodate varying workpiece sizes in clamping stations by adjusting the rear stopper within the 50 mm range.
Is the Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX125-50 the Right Cylinder?
Choose this 63 mm bore when an application requires roughly 1559 N of thrust at 0.5 MPa, stepping up from a 50 mm bore (982 N push) or down from an 80 mm bore (2513 N push). The 50 mm adjustment range is ideal for machinery requiring frequent product-size changeovers, allowing operators to dial in the exact 75-125 mm travel window without swapping cylinders.
When matching ISO 15552 dimensions, specify the 125 mm stroke, 50 mm adjuster, PT tapered port threads, and the SUS420J2 rod material. Mounting options are limited to Basic, FA, LB, TC, FTC, TCM1, and TCM2. Note that the rear adjuster acts only as a travel stop and does not hold the load without live air; for dead-air load holding, consider an external rod lock or the AirTAC SAIL series.
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 SAIJ63AX125-50 FAQ
At 0.5 MPa operating pressure, this 63 mm bore cylinder 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 acts as a mechanical stop that allows you to shorten the effective stroke by up to 50 mm. This creates a usable travel window of 75-125 mm from the nominal 125 mm stroke, enabling fine-tuning without changing the cylinder.
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