Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX240-40S
The AirTAC Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX240-40S 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 SAIJ63AX240-40S
The AirTAC SAIJ63X240-40-S is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster that lets you dial back the nominal 240 mm travel by up to 40 mm, yielding a usable window of 200 to 240 mm. This built-in stopper is ideal for fine end-position tuning during commissioning or product changeover without swapping the cylinder or adding external stops. In the 63 mm bore class, it delivers 1559 N of pull force and 2182 N of push force at a 0.7 MPa operating pressure.
This specific SKU is configured with an SUS420J2 stainless steel rod (code A) for improved corrosion resistance and a PT tapered port thread. The extruded aluminum barrel includes sensor grooves on both sides, and the -S magnet option makes it fully compatible with AirTAC CMSE reed and DMSE electronic solid-state sensors. The rear adjuster acts purely as a travel stop to set the retract end; it does not hold the load without live air pressure.
Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX240-40S Technical Specifications
| Model | Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX240-40S |
|---|---|
| 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 SAIJ63AX240-40S
| 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 SAIJ63AX240-40S Is Used
Variable End-Stop Setup
Dial in the exact retract position within the 200-240 mm window during machine commissioning without machining new external stopper blocks.
Product Changeover
Quickly adjust the stroke by up to 40 mm to accommodate different package sizes on a packaging line, reducing downtime between runs.
Clamp Position Tuning
Fine-tune the clamping distance on a 63 mm bore fixture, leveraging the 1559 N pull force while protecting the part with a precise end-stop.
Is the Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX240-40S the Right Cylinder?
Choose this 63 mm bore adjustable-stroke cylinder when your application requires a 200 to 240 mm travel window and moderate thrust (1559 N pull at 0.5 MPa). If your force requirements are lower, stepping down to a 50 mm bore drops the 0.5 MPa pull force to 825 N, while stepping up to an 80 mm bore increases it to 2268 N. The adjustable rear screw is perfect for variable end-stops on machine setup, whereas a fixed SAI cylinder is preferred if your stroke is locked and you need standard ISO 15552 mounting without an adjuster.
For a drop-in ISO 15552 replacement, match the 63 mm bore, 240 mm nominal stroke, 40 mm adjustment range, PT port thread, and the -S magnet option. Note that SAIJ uses a specific mounting subset: Basic, FA, LB, TC, FTC, TCM1, and TCM2, omitting the FB, CA, CB, and CR brackets. Because the 240 mm stroke is substantial, ensure you use an external guide to support the load and prevent excessive side-loading on the M16x1.5 rod thread. For load-holding without live pressure, consider the SAIL or BSAI series, as this cylinder's adjuster is only a stop.
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 SAIJ63AX240-40S FAQ
The rear adjuster screw acts as a mechanical stop that lets you shorten the effective stroke from the nominal 240 mm down to 200 mm. It provides a 40 mm adjustment window for fine-tuning the retract end position at commissioning, but it is not a lock and cannot hold the load without continuous air pressure.
At a 0.5 MPa operating pressure, this double-acting cylinder provides 1559 N of pull force and 1402 N of push force. If you increase the pressure to 0.7 MPa, the push force rises to 2182 N.
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