Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX400-20S
The AirTAC Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX400-20S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø63mm bore and 400mm 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
- Stroke400 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM16×1.5
- CushionAdjustable, 36 mm
About the Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX400-20S
The AirTAC SAIJ63X400-20-S is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster, providing a usable travel window of 380 to 400 mm for precise end-position tuning. Built with a 63 mm bore, it delivers 2182 N of push force at 0.7 MPa, making it suitable for medium-duty handling. The integrated -S magnet enables position sensing with AirTAC CMSE reed and DMSE electronic switches fitted into the dual sensor grooves.
This model features a SUS420J2 stainless steel rod for enhanced corrosion resistance and uses PT tapered port threads (G3/8). The rear adjuster acts purely as a mechanical stop to dial in the stroke during commissioning; it does not lock the load without live air. For load-holding requirements, an external pilot-operated check valve or a SAIL locking cylinder is required.
Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX400-20S Technical Specifications
| Model | Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX400-20S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø63 mm |
| Stroke | 400 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 SAIJ63AX400-20S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 63 | Bore size in mm. |
| ×400 | 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 SAIJ63AX400-20S Is Used
Machine Changeover
Dial in the 380-400 mm retract position during product size changes without swapping cylinders or repositioning hard stops.
End-Stop Calibration
Fine-tune the final end-of-stroke position at commissioning to achieve precise mechanical alignment without external spacers.
Material Handling
Drive medium-duty pushers with 2182 N of force at 0.7 MPa while making quick adjustments for varying package sizes.
Is the Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX400-20S the Right Cylinder?
Choose this 63 mm bore when a 50 mm cylinder (offering 1374 N push at 0.7 MPa) lacks the necessary thrust, but an 80 mm bore (3518 N) would be physically oversized. The 20 mm adjustment range is ideal for fine-tuning the retract end-position during machine setup or product changeover without adding external stops. If fixed travel is sufficient, a standard SAI cylinder simplifies the assembly.
When replacing an ISO 15552 cylinder, match the 63 mm bore, 400 mm stroke, 20 mm adjuster, G3/8 PT ports, and the -S magnet. The SAIJ mounting set includes Basic, FA, LB, TC, FTC, TCM1, and TCM2 (omitting FB, CA, CB, CR). Because the 400 mm stroke is substantial, the 20 mm rod diameter requires an external guide to prevent excessive side-loading on the unsupported length.
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 SAIJ63AX400-20S FAQ
The rear adjuster screw allows you to shorten the effective stroke by up to 20 mm, creating a usable travel window of 380 to 400 mm. It acts as a mechanical stop to fine-tune the end position and does not function as a lock.
At 0.7 MPa operating pressure, the SAIJ63X400-20-S provides 2182 N of push force and 1402 N of pull force. It can reach a maximum push force of 2805 N at 0.9 MPa.
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