Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX120-75S
The AirTAC Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX120-75S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø63mm bore and 120mm 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
- Stroke120 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM16×1.5
- CushionAdjustable, 36 mm
About the Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX120-75S
The AirTAC SAIJ63X120-75-S is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster that allows you to fine-tune the effective travel. With a nominal 120 mm stroke and a 75 mm adjustment range, it provides a highly flexible usable travel window of 45 to 120 mm. This wide adjustment band is ideal for product changeovers, letting you dial in the retract end-position precisely at commissioning without swapping the cylinder or adding external stops. The 63 mm bore delivers 1559 N push force at 0.5 MPa, scaling up to 2182 N at 0.7 MPa, making it robust enough for mid-range automation tasks.
This unit includes a magnet for position sensing, working seamlessly with AirTAC CMSE reed switches and DMSE solid-state electronic sensors. It features a SUS420J2 stainless steel rod (option A) for improved corrosion resistance compared to standard carbon steel. The extruded aluminum barrel includes sensor grooves on both sides, and the PT tapered port threads ensure a tight, reliable pneumatic connection. The rear adjuster acts purely as a travel stop to set deceleration and end limits; it does not hold the load without live air pressure.
Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX120-75S Technical Specifications
| Model | Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX120-75S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø63 mm |
| Stroke | 120 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 SAIJ63AX120-75S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 63 | Bore size in mm. |
| ×120 | 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 SAIJ63AX120-75S Is Used
Variable End-Stop Dosing
Adjust the retract stroke from 45 to 120 mm on the fly to dispense different material volumes without changing the actuator.
Machine Changeover
Quickly reposition the end-of-stroke stop during product size transitions on a packaging line, saving setup time.
Sensor-Driven Positioning
Leverage the -S magnet with DMSE solid-state sensors to confirm the adjusted end-position for high-accuracy clamping.
Is the Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX120-75S the Right Cylinder?
Choose this 63 mm bore adjustable cylinder when your application requires a variable end-stop within a 45-120 mm travel window. If your process demands less force, stepping down to a 50 mm bore yields 982 N push at 0.5 MPa, while stepping up to an 80 mm bore provides 2513 N. The SAIJ63X120-75-S is selected over a fixed-stroke SAI when machine setups frequently change product sizes, requiring on-the-fly repositioning without hardware modifications. For load-holding without live air pressure, this cylinder is insufficient; consider the SAIL (air-released lock) or BSAI (clamp-lock) variants instead.
When replacing an ISO 15552 cylinder, match the 63 mm bore, 120 mm nominal stroke, 75 mm adjustment range, PT port threads, and the -S magnet option. The 20 mm rod diameter and M16x1.5 rod thread provide good rigidity, but because the stroke is 120 mm, ensure your mounting arrangement—whether Basic, FA, LB, TC, FTC, TCM1, or TCM2—supports the load adequately to prevent side-loading on the rod.
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 SAIJ63AX120-75S FAQ
At 0.5 MPa operating pressure, this 63 mm bore cylinder provides 1559 N of push force and 1402 N of pull force. If you increase the pressure to 0.7 MPa, the push force rises to 2182 N.
It has a 120 mm nominal stroke with a 75 mm rear adjuster, creating an adjustable usable travel window of 45 to 120 mm. The rear screw acts as a travel stop for end-position tuning, but it does not lock or hold the load without live air pressure.
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