Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX115-50
The AirTAC Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX115-50 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø63mm bore and 115mm 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
- Stroke115 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM16×1.5
- CushionAdjustable, 36 mm
About the Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX115-50
The AirTAC SAIJ63X115-50 is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster that dials back the nominal 115mm travel by up to 50mm, creating a highly flexible 65-115mm usable window. This on-device fine-tuning allows operators to set exact retract end-positions during commissioning or product changeovers without swapping out the physical barrel or adding bulky external stops.
Delivering a robust 2182N of push force at 0.7MPa, this 63mm bore unit integrates a corrosion-resistant SUS420J2 stainless steel rod (code A) to handle demanding environments. It features PT tapered port threads (G3/8) and utilizes variable air cushions at both ends to manage deceleration. The rear adjuster acts strictly as a travel stop and does not hold the load without live air pressure; for true fail-safe load holding, consider the SAIL or BSAI series.
Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX115-50 Technical Specifications
| Model | Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX115-50 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø63 mm |
| Stroke | 115 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 SAIJ63AX115-50
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 63 | Bore size in mm. |
| ×115 | 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 SAIJ63AX115-50 Is Used
Machine Changeover
Dial in the retract stop from 115mm down to 65mm to quickly adapt automated machinery for different product lengths without changing the cylinder.
End-Position Tuning
Fine-tune the exact end-of-stroke position during initial commissioning to absorb mechanical tolerances and achieve precise placement.
Variable Stops
Replace rigid fixed stops with an integrated adjusting screw, allowing operators to modify the travel window on the production floor as needed.
Is the Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX115-50 the Right Cylinder?
Choose this 63mm adjustable cylinder when your application requires variable end-stops within a 65-115mm travel range and approximately 2182N of thrust at 0.7MPa. If your setup only needs 1402N of pull force, stepping down to a 50mm bore saves space, while moving up to an 80mm bore provides 3518N push for heavier payloads. Because the standard 63mm bore offers a maximum standard stroke of 1500mm, this 115mm unit is a readily available, non-made-to-order size.
The rear adjuster is a stop, not a locking mechanism, so it cannot hold a load in place without continuous air pressure. As an ISO 15552 dimensionally interchangeable profile cylinder, it drops in seamlessly with standard mounting hardware, utilizing a reduced SAIJ accessory set of Basic, FA, LB, TC, FTC, TCM1, and TCM2 (omitting FB, CA, CB, and CR).
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 SAIJ63AX115-50 FAQ
At an operating pressure of 0.7 MPa, this 63mm bore cylinder provides 2182N of push force and 1402N of pull force. It can reach a maximum push force of 2805N at 0.9 MPa.
The rear adjuster screw allows you to shorten the effective travel by up to 50mm from the 115mm nominal stroke, creating a usable 65-115mm window. It functions as a mechanical stop to set the end position and does not lock the load without live air pressure.
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