Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX300-75S
The AirTAC Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX300-75S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø63mm bore and 300mm 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
- Stroke300 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM16×1.5
- CushionAdjustable, 36 mm
About the Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX300-75S
The AirTAC SAIJ63X300-75-S is a double-acting, single-rod ISO 15552 profile cylinder featuring a rear-mounted stroke adjuster. It provides a 225-300 mm usable travel window by allowing you to trim up to 75 mm from the 300 mm nominal stroke, enabling precise end-position tuning at commissioning without adding external stops. This bore delivers 2182 N of push force at 0.7 MPa and includes a built-in magnet for CMSE or DMSE sensors.
This configuration uses a SUS420J2 stainless steel rod (option A) for improved corrosion resistance and features PT tapered port threads (G3/8). The extruded aluminum barrel includes sensor grooves on both sides. The rear adjuster acts purely as a travel stop for end-position deceleration; it does not hold the load without live air pressure.
Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX300-75S Technical Specifications
| Model | Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX300-75S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø63 mm |
| Stroke | 300 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 SAIJ63AX300-75S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 63 | Bore size in mm. |
| ×300 | 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 SAIJ63AX300-75S Is Used
Variable End-Stop Setup
Dial in the exact retract position within the 225-300 mm window during machine commissioning to accommodate different material thicknesses without mechanical rework.
Product Size Changeover
Quickly adjust the stroke length on packaging lines when switching between box sizes, using the rear screw to fine-tune the travel end for each new product run.
Sensor-Ready Positioning
Leverage the integrated magnet with DMSE solid-state sensors to confirm the adjusted end-of-stroke position in automated assembly and testing equipment.
Is the Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX300-75S the Right Cylinder?
Choose this 63 mm bore when an application requires 2182 N of push force at 0.7 MPa but demands flexible end-positioning. The 75 mm adjustment range is ideal for product changeovers on a line, allowing you to dial back the 300 mm stroke to 225 mm without swapping the cylinder. If you need less force, stepping down to a 50 mm bore yields 1374 N at 0.7 MPa.
Because this cylinder features a 300 mm stroke, the 20 mm rod diameter and M16x1.5 rod thread will experience more side-load leverage if the load is unsupported; an external guide is recommended for optimal longevity. To replace an ISO 15552 cylinder, match the 63 mm bore, 300 mm stroke, 75 mm adjustment, PT G3/8 ports, and the -S magnet. Note that for load-holding without live pressure, you should select an SAIL or BSAI series cylinder instead of relying on this adjuster.
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 SAIJ63AX300-75S FAQ
The rear adjusting screw acts as a mechanical stopper, allowing you to shorten the effective stroke by up to 75 mm. This creates a usable travel window of 225-300 mm from the 300 mm nominal stroke, which is set at commissioning without replacing the cylinder.
At a 0.7 MPa operating pressure, the SAIJ63X300-75-S provides a push force of 2182 N and a pull force of 1402 N. The maximum operating pressure is 1.0 MPa, yielding up to 2805 N of push force.
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