Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX155-50S
The AirTAC Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX155-50S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø63mm bore and 155mm 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
- Stroke155 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM16×1.5
- CushionAdjustable, 36 mm
About the Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX155-50S
The AirTAC SAIJ63X155-50-S is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster that creates a 105-155 mm usable travel window. Delivering 2182 N of push force at 0.7 MPa, it handles robust actuation while allowing precise end-position tuning. The PT tapered port threads and SUS420J2 stainless steel rod provide excellent corrosion resistance for demanding environments.
Equipped with a magnet (-S), this unit supports AirTAC CMSE reed and DMSE electronic sensors mounted into the dual-side extruded barrel grooves. The rear stopper lets you dial in the retract position during commissioning without adding external stops, though it acts only as a travel limiter and not a load-holding lock.
Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX155-50S Technical Specifications
| Model | Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX155-50S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø63 mm |
| Stroke | 155 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 SAIJ63AX155-50S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 63 | Bore size in mm. |
| ×155 | 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 SAIJ63AX155-50S Is Used
Product Changeover
Dial in the 105-155 mm travel window during format size changes on a packaging line without replacing the cylinder.
End-Stop Calibration
Fine-tune the retract position at machine commissioning to achieve exact mechanical alignment.
Variable Positioning
Actuate varying workpiece sizes on the same conveyor using the 50 mm adjustable stroke range.
Is the Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX155-50S the Right Cylinder?
Choose this 63 mm bore when a 50 mm bore (offering 1374 N push at 0.5 MPa) lacks thrust, but an 80 mm bore (3518 N push at 0.5 MPa) is physically oversized. The 50 mm adjustment range is ideal for machines requiring frequent product-size changeovers, giving you a wide 105-155 mm window to tune without swapping the cylinder. For fixed-position tasks without variance, a standard SAI cylinder suffices.
If your application must hold a load without continuous live air pressure, note that the SAIJ rear adjuster and air cushions do not function as a lock; consider an AirTAC SAIL or BSAI cylinder instead. This SAIJ variant uses a reduced mounting set (Basic, FA, LB, TC, FTC, TCM1, TCM2), omitting FB, CA, CB, and CR brackets. It is dimensionally interchangeable per ISO 15552.
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 SAIJ63AX155-50S FAQ
At 0.5 MPa it provides 1559 N push and 1402 N pull force. At 0.7 MPa, the push force increases to 2182 N.
The rear adjuster acts as a mechanical stop, allowing you to shorten the nominal 155 mm stroke down to 105 mm. This stopper sets the travel end but does not lock the load without live air pressure.
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