Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX300-40S
The AirTAC Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX300-40S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø63mm bore and 300mm 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
- Stroke300 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM16×1.5
- CushionAdjustable, 36 mm
About the Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX300-40S
The AirTAC SAIJ63X300-40-S is a double-acting, single-rod ISO 15552 profile cylinder equipped with a rear stroke adjuster. It provides a 260-300 mm usable travel window by allowing you to trim up to 40 mm from the 300 mm nominal stroke without adding external stops. It delivers 1559 N of pull force at 0.5 MPa and 2182 N of push force at 0.7 MPa.
This SKU features a SUS420J2 stainless steel rod for corrosion resistance and includes a magnet for CMSE reed and DMSE electronic sensors. The extruded aluminum barrel includes sensor grooves on both sides. 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 SAIJ63AX300-40S Technical Specifications
| Model | Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX300-40S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø63 mm |
| Stroke | 300 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 SAIJ63AX300-40S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 63 | Bore size in mm. |
| ×300 | 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 SAIJ63AX300-40S Is Used
Machine Changeover
Fine-tune the 260-300 mm retract position on the fly when switching product sizes on a packaging line, avoiding physical cylinder swaps.
End-Stop Calibration
Dial in the exact end-of-stroke position during machine commissioning to perfect pressing or clamping force without mechanical shims.
Variable Forming Stops
Adjust the travel limit for different material thicknesses in a forming press, using the rear screw to set the precise 260-300 mm window.
Is the Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX300-40S the Right Cylinder?
Choose this 63 mm bore when you need higher force than the 50 mm bore (982 N pull at 0.5 MPa) but less bulk than the 80 mm bore (2268 N pull). The adjustable stroke is ideal for machine changeovers, letting you fine-tune the retract end position during commissioning rather than swapping a fixed-stroke SAI cylinder. Because the nominal stroke is 300 mm, the M16x1.5 rod should be guided externally to prevent excessive side-loading on the seals.
For drop-in ISO 15552 interchangeability, match the 63 mm bore, 300 mm stroke, PT tapered G3/8 port, and mounting set (Basic, FA, LB, TC, FTC, TCM1, TCM2). If your application requires true load-holding without continuous air pressure, use an external rod lock or explore the SAIL or BSAI series instead of relying on the rear stopper.
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 SAIJ63AX300-40S FAQ
At 0.5 MPa, it provides 1559 N of pull force and 1402 N of push force. At 0.7 MPa, the push force increases to 2182 N.
The rear adjuster screw lets you shorten the 300 mm nominal stroke by up to 40 mm, creating a 260-300 mm travel window. It acts as a mechanical stop and does not function as a lock to hold loads without air pressure.
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