Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX300-20
The AirTAC Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX300-20 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 SAIJ63AX300-20
The AirTAC SAIJ63X300-20 is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster that allows you to fine-tune the effective travel down to a 280-300 mm window. Delivering a push force of 1559 N and a pull force of 1402 N at 0.5 MPa, it handles robust actuation tasks while maintaining standard ISO 15552 mounting interface dimensions. The extruded aluminum barrel includes sensor grooves on both sides for flexible position detection.
This SKU is configured with an SUS420J2 stainless steel rod for enhanced corrosion resistance and uses PT tapered port threads. The 20 mm adjustment range lets you dial in the exact retract end-position during commissioning or product changeovers without swapping out the entire cylinder. The rear adjuster acts purely as a mechanical stop to set the travel limit and does not function as a lock to hold the load without continuous air pressure.
Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX300-20 Technical Specifications
| Model | Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX300-20 |
|---|---|
| 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 SAIJ63AX300-20
| 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 SAIJ63AX300-20 Is Used
Machine Changeover
Dial in the 280-300 mm retract position during product size transitions without adding external stops or changing the cylinder.
End-Position Tuning
Fine-tune the final retract stop during commissioning to perfect the seating of components on the assembly line.
Adjustable Ejection
Set the exact ejection distance for varying part lengths on a conveyor system using the rear adjustment screw.
Is the Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX300-20 the Right Cylinder?
Choose this 63 mm bore when your application requires the 1559 N push force at 0.5 MPa, stepping up from a 50 mm bore that provides 982 N, or down from an 80 mm bore yielding 2513 N. An adjustable-stroke cylinder is preferred over a fixed SAI model when machinery undergoes frequent product changeovers, allowing operators to set variable end-stops precisely on the fly. For load-holding requirements without live air pressure, consider the SAIL or BSAI series, as the SAIJ adjuster only restricts travel. Because the 300 mm stroke is relatively long, an external guide is recommended to prevent excessive side-loading on the 20 mm rod. To match this ISO 15552 replacement exactly, verify the 300 mm stroke, 20 mm adjustment, PT G3/8 port, and standard mounting options (Basic, FA, LB, TC, FTC, TCM1, TCM2).
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 SAIJ63AX300-20 FAQ
At 0.5 MPa operating pressure, this 63 mm bore cylinder provides a push force of 1559 N and a pull force of 1402 N. At 0.7 MPa, the push force increases to 2182 N.
The rear adjuster screw allows you to shorten the nominal 300 mm stroke by up to 20 mm, creating a usable travel window of 280-300 mm. It acts as a mechanical stop to tune the end position and requires live air to hold the load.
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