Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX240-20S
The AirTAC Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX240-20S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø63mm bore and 240mm 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
- Stroke240 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM16×1.5
- CushionAdjustable, 36 mm
About the Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX240-20S
The AirTAC SAIJ63X240-20-S is a double-acting ISO 15552 profile cylinder featuring a rear-mounted stroke adjuster. It provides a usable travel window of 220 to 240 mm, allowing you to dial back the standard 240 mm stroke by up to 20 mm during machine commissioning. Equipped with a SUS420J2 stainless steel rod and a PT tapered port, it delivers 1559 N of push force at 0.5 MPa and 2182 N at 0.7 MPa.
This model includes a magnet for position sensing, working seamlessly with AirTAC CMSE reed and DMSE electronic solid-state switches mounted in the dual-side sensor grooves. The extruded aluminum barrel design omits tie-rods, and the mounting interface is dimensionally interchangeable with ISO 15552 cylinders. The rear stopper screw sets the travel end and relies on the built-in air cushion for deceleration, but it does not hold the load without live air pressure.
Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX240-20S Technical Specifications
| Model | Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX240-20S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø63 mm |
| Stroke | 240 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 SAIJ63AX240-20S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 63 | Bore size in mm. |
| ×240 | 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 SAIJ63AX240-20S Is Used
Changeover Calibration
Dial in the exact 220-240 mm end-position during product size changeovers without replacing the cylinder or adding external mechanical stops.
End-Position Trimming
Use the 20 mm rear adjuster to fine-tune the retract stroke during machine commissioning, absorbing minor mechanical tolerances in the fixture.
Sensor-Ready Automation
Leverage the built-in magnet and dual sensor grooves to mount CMSE or DMSE switches for precise position feedback alongside the adjustable travel.
Is the Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX240-20S the Right Cylinder?
Choose this 63 mm bore adjustable-stroke cylinder when your application requires fine-tuning the retract end-position without swapping out the entire unit or adding external stops. If your process needs less force, stepping down to a 50 mm bore yields 982 N of push force at 0.5 MPa; stepping up to an 80 mm bore provides 2513 N. At 240 mm of travel, the 20 mm adjustment window is ideal for accommodating minor product size variations on a changeover line. Because the stroke is 240 mm, ensure external guidance is used to prevent excessive side-loading on the M16x1.5 rod thread. For load-holding without continuous air pressure, select the SAIL or BSAI series instead, as the SAIJ rear adjuster functions only as a travel stop, not a mechanical lock. This SKU uses a PT tapered G3/8 port, supports Basic, FA, LB, TC, FTC, TCM1, and TCM2 mounts, and includes the -S magnet for CMSE/DMSE sensors.
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 SAIJ63AX240-20S FAQ
It delivers 1559 N of push force and 1402 N of pull force at 0.5 MPa. The nominal 240 mm stroke can be adjusted backward by up to 20 mm, providing a usable travel window of 220 to 240 mm.
No, the rear adjuster acts only as a travel stop to set the end-position and relies on the air cushion for deceleration. It is not a lock or brake. For load-holding without live air pressure, use the SAIL or BSAI cylinder series.
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