Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX375-50S
The AirTAC Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX375-50S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø63mm bore and 375mm 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
- Stroke375 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM16×1.5
- CushionAdjustable, 36 mm
About the Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX375-50S
The AirTAC SAIJ63X375-50-S is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster, providing a usable travel window of 325 to 375 mm. It delivers a robust 1559 N push force and 1402 N pull force at 0.5 MPa, making it suitable for medium-duty handling. The integrated -S magnet enables position feedback via CMSE reed or DMSE electronic solid-state sensors housed in the dual-side barrel grooves.
This variant features a SUS420J2 stainless steel rod for enhanced corrosion resistance and uses PT tapered port threads. Because the nominal stroke is 375 mm, the external adjuster allows precise end-position tuning during commissioning without adding external stops. Remember that the adjuster acts solely as a travel stop; it does not lock the load without live air pressure.
Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX375-50S Technical Specifications
| Model | Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX375-50S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø63 mm |
| Stroke | 375 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 SAIJ63AX375-50S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 63 | Bore size in mm. |
| ×375 | 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 SAIJ63AX375-50S Is Used
Machine Changeover
Dial in the 325-375 mm travel window during product size transitions without swapping the cylinder or bolting on external physical stops.
End-Position Tuning
Fine-tune the retract stroke at commissioning using the rear adjuster to perfectly time the 1559 N push motion against mechanical limits.
Variable Stops
Act as a diverter on a conveyor line where the exact extension length needs frequent adjustment to accommodate varying package dimensions.
Is the Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX375-50S the Right Cylinder?
Select this 63 mm bore unit when your application requires 1559 N of thrust at 0.5 MPa and needs on-the-fly stroke trimming. If you need less force, the 50 mm bore offers 982 N; if you need more, the 80 mm bore provides 2513 N. Choose this adjustable-stroke model over a fixed SAI cylinder when you need variable end-stops for machine setup or product changeovers. For load-holding without continuous air pressure, consider the SAIL or BSAI series, as the SAIJ adjuster is not a brake.
To replace an ISO 15552 cylinder, match the 63 mm bore, 375 mm nominal stroke, 50 mm adjustment range, PT G3/8 ports, and the -S magnet requirement. Available mountings include Basic, FA, LB, TC, FTC, TCM1, and TCM2. Since the 375 mm stroke is relatively long, ensure adequate external guide support to prevent excessive side-loading on the 20 mm rod and M16x1.5 rod thread.
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 SAIJ63AX375-50S FAQ
At 0.5 MPa operating pressure, this 63 mm bore cylinder provides 1559 N of push force and 1402 N of pull force. It can reach up to 2805 N push force at its maximum 1.0 MPa pressure.
The rear adjuster screw allows you to shorten the effective stroke by up to 50 mm from the 375 mm nominal length, creating a 325-375 mm travel window. It functions as a hard stop for end-position tuning and does not hold the load without live air pressure.
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