Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX120-40S
The AirTAC Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX120-40S 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 SAIJ63AX120-40S
The AirTAC SAIJ63X120-40-S is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster, enabling you to dial back the nominal 120 mm travel by up to 40 mm. This yields an effective usable travel window of 80-120 mm, providing exceptional flexibility for fine-tuning end positions at commissioning without swapping out the cylinder or adding external stops. In the 63 mm bore class, it delivers a robust 2182 N of push force at 0.7 MPa, making it well-suited for moderate to heavy industrial positioning tasks.
This specific SKU is factory-configured with a SUS420J2 stainless steel rod (material code A) for enhanced corrosion resistance and includes an integrated magnet (-S) for position sensing. The magnet is fully compatible with AirTAC CMSE reed switches and DMSE electronic sensors, which seat directly into the extruded aluminum barrel's dual sensor grooves. Fluid supply is routed through PT tapered G3/8 ports, and the standard adjustable air cushions at both ends absorb kinetic energy at the end of travel.
Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX120-40S Technical Specifications
| Model | Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX120-40S |
|---|---|
| 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 SAIJ63AX120-40S
| 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 SAIJ63AX120-40S Is Used
Changeover Adjustment
Dial in the 80-120 mm travel window during machine setup to accommodate new product lengths without disassembling the pneumatic rig.
Sensor-Driven Stops
Leverage the integrated magnet with DMSE electronic sensors to confirm the exact adjusted end-position before triggering the next machine cycle.
Corrosion-Resistant Actuation
Utilize the SUS420J2 stainless steel rod in manufacturing environments where moisture or minor chemical exposure would degrade standard carbon steel rods.
Is the Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX120-40S the Right Cylinder?
Selecting this 63 mm bore cylinder makes sense when your application requires a 2182 N push force at 0.7 MPa, bridging the gap between the 50 mm bore (1374 N push at 0.7 MPa) and the larger 80 mm bore (3518 N push at 0.7 MPa). The 40 mm adjustment range is particularly valuable on machines that undergo frequent product changeovers, allowing operators to set variable end-stops on the fly. If your process absolutely requires the load to hold its position without continuous live air pressure, a standard SAIJ will not suffice, as its rear adjuster acts only as a travel stop and not a lock; in that scenario, you should pivot to the SAIL (air-released lock) or BSAI (clamp-lock) series.
When replacing an ISO 15552 cylinder, match the 63 mm bore, 120 mm nominal stroke, 40 mm adjustment range, PT G3/8 port thread, and the -S magnet requirement. Because the 120 mm stroke is relatively short for this bore size, side-load stress on the M16x1.5 rod thread is minimal, though any application with heavy off-center loads should still utilize an external guide rail. The SAIJ mounting set includes Basic, FA, LB, TC, FTC, TCM1, and TCM2 options, deliberately omitting the FB, CA, CB, and CR variants.
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 SAIJ63AX120-40S FAQ
At a 0.7 MPa operating pressure, this 63 mm bore cylinder generates 2182 N of push force and 1402 N of pull force. It operates efficiently at speeds between 30 and 800 mm/s.
The rear adjuster screw acts as a mechanical stop that shortens the effective stroke from the 120 mm nominal length. You can trim the travel back by up to 40 mm, creating an 80 to 120 mm usable window. This mechanism only sets the end position; it does not lock the load without live air pressure.
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