Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX375-20S
The AirTAC Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX375-20S 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 SAIJ63AX375-20S
The AirTAC SAIJ63X375-20-S is a double-acting, ISO 15552 profile cylinder featuring a rear stroke adjuster. It provides a 1559N push force at 0.5 MPa and uses a 20mm adjustment screw to trim the effective travel, creating a 355-375mm usable window. This allows precise end-position tuning during commissioning without adding external stops.
This SKU includes a SUS420J2 stainless steel rod for improved corrosion resistance and a position magnet for CMSE or DMSE sensors. Because the 375mm stroke is long, the 20mm rod and M16x1.5 thread still require an external guide to handle side loads. The rear adjuster acts purely as a travel stop and does not hold the load without live air pressure.
Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX375-20S Technical Specifications
| Model | Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX375-20S |
|---|---|
| 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 SAIJ63AX375-20S
| 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 SAIJ63AX375-20S Is Used
Product Changeovers
Dial in the 355-375mm travel window during line format changes to accommodate different package sizes without swapping cylinders.
End-Position Tuning
Fine-tune the retract stop during machine commissioning to perfect the mechanical stroke limit and avoid hard crashes.
Variable End Stops
Use the rear adjuster to set precise retraction distances on automated assembly equipment requiring flexible travel limits.
Is the Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX375-20S the Right Cylinder?
Choose this 63mm bore cylinder when you need 1559N of push force at 0.5 MPa with variable end-stops. If your application requires less force, step down to a 50mm bore providing 982N; if you need more power, move up to an 80mm bore delivering 2513N. An adjustable stroke is ideal for machine setups requiring frequent product changeovers, whereas a fixed SAI cylinder suits dedicated single-purpose tasks.
To replace this ISO 15552 cylinder, match the 63mm bore, 375mm stroke, 20mm adjustment, PT G3/8 port, and the -S magnet. It supports Basic, FA, LB, TC, FTC, TCM1, and TCM2 mounts. For load-holding without live air, select a SAIL or BSAI cylinder instead, as this adjuster is not a lock.
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 SAIJ63AX375-20S FAQ
The rear adjuster screw allows you to shorten the nominal 375mm stroke by up to 20mm, giving a usable travel window of 355-375mm. This stopper sets the retract end position but does not lock the load without continuous air pressure.
At 0.5 MPa operating pressure, it provides 1559N of push force and 1402N of pull force. At 0.7 MPa, the push force increases to 2182N.
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