Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX400-50S
The AirTAC Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX400-50S 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 SAIJ63AX400-50S
The AirTAC SAIJ63X400-50-S is a double-acting ISO 15552 profile cylinder equipped with a rear mechanical adjuster, allowing you to fine-tune the retract end-position without adding external stops. It provides a usable travel window of 350-400 mm, trimming up to 50 mm off the 400 mm nominal stroke. In the 63 mm bore class, it delivers 1559 N of pull force at 0.5 MPa and 2182 N at 0.7 MPa.
This variant features a SUS420J2 stainless steel rod for corrosion resistance and includes a magnet for position detection. The extruded aluminum barrel houses sensor grooves on both sides, supporting AirTAC CMSE reed and DMSE electronic solid-state switches. It uses PT tapered G3/8 ports and variable air cushions at both ends to manage deceleration.
Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX400-50S Technical Specifications
| Model | Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX400-50S |
|---|---|
| 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 SAIJ63AX400-50S
| 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 SAIJ63AX400-50S Is Used
Machine Changeover
Dial in the exact 350-400 mm retract position on packaging lines when switching product sizes, avoiding physical cylinder swaps.
End-Stop Calibration
Fine-tune the final end-position during machine commissioning to absorb mechanical tolerances without installing external bumpers.
Material Diversion
Adjust the stroke length on the fly for diverting varying package widths on a conveyor belt without reprogramming the motion controller.
Is the Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX400-50S the Right Cylinder?
Choose this 63 mm bore adjustable cylinder when your application requires precise end-stop tuning during commissioning or frequent product changeovers, stepping up from the 50 mm bore (982 N pull at 0.5 MPa) for heavier loads. Because the 400 mm stroke is relatively long, ensure you use an external guide to prevent excessive rod side-loading, as the 20 mm rod and M16x1.5 thread can only compensate so much for lateral forces. The rear adjuster acts purely as a travel stop and does not hold the load without live air pressure; for true fail-safe load holding, select a SAIL or BSAI series cylinder instead. This SAIJ model uses a reduced mounting set (Basic, FA, LB, TC, FTC, TCM1, TCM2) and 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 SAIJ63AX400-50S FAQ
At 0.5 MPa operating pressure, this 63 mm bore cylinder provides 1559 N of pull force and 2182 N at 0.7 MPa. The operational speed range is 30-800 mm/s.
The rear adjuster screw lets you shorten the 400 mm nominal stroke by up to 50 mm, creating a usable travel window of 350-400 mm. It functions as a mechanical stop to set the end position, but it does not lock the load without continuous air pressure.
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