Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX400-30
The AirTAC Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX400-30 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 SAIJ63AX400-30
The AirTAC SAIJ63X400-30 is a double-acting ISO 15552 profile cylinder featuring a rear-mounted stroke adjuster. It provides a usable travel window of 370 to 400 mm, allowing you to dial back the nominal 400 mm stroke by up to 30 mm during commissioning. With a robust 20 mm piston rod and a G3/8 port, it delivers up to 2805 N of push force at 0.9 MPa, making it a strong choice for demanding mid-range pneumatics.
This variant features an SUS420J2 stainless steel rod for enhanced corrosion resistance and utilizes PT tapered port threads. The extruded aluminum barrel includes sensor grooves on both sides, ready for AirTAC CMSE reed and DMSE electronic sensors if position feedback is later required. The adjustment mechanism acts purely as a mechanical stop to fine-tune the end position without adding external stops.
Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX400-30 Technical Specifications
| Model | Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX400-30 |
|---|---|
| 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 SAIJ63AX400-30
| 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 SAIJ63AX400-30 Is Used
Machine Changeover
Fine-tune the 370-400 mm retract position during product size changes without physically replacing the cylinder or adding external stopper blocks.
End-Position Tuning
Dial in the exact end-of-stroke location during initial setup to compensate for mechanical tolerances in the fixture or tooling.
Mid-Range Positioning
Leverage the 2805 N push force at 0.9 MPa to move and position heavier jigs or workpieces within a 400 mm travel envelope.
Is the Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX400-30 the Right Cylinder?
Choose this 63 mm bore when a 50 mm bore (offering 1767 N push at 0.9 MPa) is too weak, but an 80 mm bore (providing 4523 N) is oversized. The adjustable stroke is ideal for machine changeovers where the exact retract position needs precise tweaking without swapping out the entire cylinder.
Because the 400 mm stroke is substantial, the 20 mm rod diameter will still experience side-loading forces on long unsupported extensions; an external guide rail is recommended to prevent premature wear. Remember that the rear adjuster is a travel stop, not a lock, so this cylinder will not hold a load without live air pressure. For load-holding without air, consider the SAIL or BSAI series. It uses the standard SAIJ 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 SAIJ63AX400-30 FAQ
The SAIJ63X400-30 has a rear adjuster screw that lets you shorten the effective stroke from 400 mm down to a minimum of 370 mm. This creates a 30 mm adjustable travel window for fine-tuning the retract position at commissioning.
At a 0.9 MPa operating pressure, this 63 mm bore cylinder generates 2805 N of push force and 2182 N of pull force. At the maximum 1.0 MPa pressure, it can deliver up to 318 kgf.
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