Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX40-20
The AirTAC Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX40-20 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø63mm bore and 40mm 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
- Stroke40 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM16×1.5
- CushionAdjustable, 36 mm
About the Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX40-20
The AirTAC SAIJ63X40-20 is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster, delivering 1559 N of push force at 0.5 MPa. It features a SUS420J2 stainless steel rod and PT tapered ports. By turning the rear screw, you achieve a usable travel window of 20 to 40 mm, allowing precise end-position tuning without swapping hardware.
This adjustable-stroke design is ideal for product changeovers on the line. The rear stopper sets the retraction end, while the extruded aluminum barrel retains standard sensor grooves on both sides. Note that the adjuster acts only as a travel stop and does not hold the load without live air pressure.
Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX40-20 Technical Specifications
| Model | Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX40-20 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø63 mm |
| Stroke | 40 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 SAIJ63AX40-20
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 63 | Bore size in mm. |
| ×40 | 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 SAIJ63AX40-20 Is Used
Product Changeovers
Dial in the 20-40 mm travel window during format changes to accommodate varying part sizes without re-mounting the actuator.
End-Stop Calibration
Fine-tune the retraction end position at machine setup to guarantee precise mechanical alignment for critical operations.
Short-Stroke Clamping
Utilize the 1559 N push force at 0.5 MPa for robust clamping tasks where the exact grip distance requires on-site adjustment.
Is the Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX40-20 the Right Cylinder?
Choose this 63 mm bore when a 50 mm bore (982 N push at 0.5 MPa) lacks thrust, but an 80 mm bore (2513 N at 0.5 MPa) is physically oversized. The 20 mm adjustment window on this 40 mm stroke enables exact end-stop calibration during commissioning, unlike a fixed SAI cylinder. For load-holding without continuous air, use an external rod lock or pilot-operated check valve, as the adjuster is not a brake.
To match this ISO 15552 dimensionally interchangeable cylinder, specify: 63 mm bore, 40 mm stroke, 20 mm adjustment, PT ports, SUS420J2 rod, and no magnet. It supports a mounting subset of Basic, FA, LB, TC, FTC, TCM1, and TCM2 (omitting FB, CA, CB, and CR). With a 40 mm stroke, the M16x1.5 rod handles side loads well without external guides.
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 SAIJ63AX40-20 FAQ
At 0.5 MPa operating pressure, this 63 mm bore cylinder provides 1559 N of push force and 1402 N of pull force. At 0.7 MPa, the push force increases to 2182 N.
The rear adjuster screw allows you to trim the effective travel, providing a usable stroke window of 20 to 40 mm. This stopper fine-tunes the end position but does not lock the load without live air.
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