Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX240-50
The AirTAC Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX240-50 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 SAIJ63AX240-50
The AirTAC SAIJ63X240-50 is a double-acting, single-rod ISO 15552 profile cylinder featuring a rear-mounted stroke adjuster. It delivers a robust 1559 N push force at 0.5 MPa, utilizing a G3/8 port and a 20 mm piston rod with an M16x1.5 thread. By turning the rear screw, you can trim the effective travel back by up to 50 mm, creating a highly flexible 190-240 mm usable stroke window. This allows precise end-position tuning during commissioning without swapping out the entire actuator.
This specific configuration features a SUS420J2 stainless steel rod (material code A) for enhanced corrosion resistance compared to standard carbon steel. The extruded aluminum barrel includes sensor grooves on both sides, allowing you to mount AirTAC CMSE reed or DMSE electronic sensors directly if position feedback is later required. It relies on adjustable air cushions at both ends to decelerate the load smoothly within its 30-800 mm/s operating speed range.
Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX240-50 Technical Specifications
| Model | Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX240-50 |
|---|---|
| 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 SAIJ63AX240-50
| 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 SAIJ63AX240-50 Is Used
Product Changeovers
Quickly reconfigure the 190-240 mm stroke window on packaging lines when switching to different carton or box sizes without changing the cylinder.
End-Position Tuning
Fine-tune the exact retraction point during machine commissioning to perfect tooling alignment and avoid hard mechanical crashes.
Variable End Stops
Replace rigid fixed-stroke actuators on assembly stations where multiple part lengths require a flexible, dial-in physical stop.
Is the Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX240-50 the Right Cylinder?
Select this 63 mm bore actuator when an application requires moderate thrust combined with variable end-stops. If your process demands less force, stepping down to a 50 mm bore yields 982 N of push force at 0.5 MPa; conversely, an 80 mm bore provides 2513 N for heavier loads. The 50 mm adjustment range is ideal for production lines running multiple product sizes, as operators can dial in the exact retraction point on the fly instead of adding external mechanical stops.
When integrating this cylinder, ensure the side-load remains within limits, as the 20 mm rod and M16x1.5 thread handle moderate stress but long unsupported strokes still require an external guide. The SAIJ mounting set includes Basic, FA, LB, TC, FTC, TCM1, and TCM2 options, deliberately omitting FB, CA, CB, and CR. Remember that the rear adjuster functions strictly as a travel stop, not a lock; the cylinder cannot hold a load without live air, so specify a SAIL or BSAI variant if true load-holding is required. This model uses PT tapered port threads.
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 SAIJ63AX240-50 FAQ
At a standard 0.5 MPa operating pressure, this 63 mm bore cylinder provides 1559 N of push force and 1402 N of pull force. If operating at 0.7 MPa, the push force increases to 2182 N.
The rear adjuster screw allows you to shorten the nominal 240 mm stroke by up to 50 mm, creating a usable travel window of 190 to 240 mm. This stopper only sets the travel end and does not lock the load without continuous air pressure.
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