Airtac SAI63 Standard Cylinder SAI63AX850
The AirTAC Airtac SAI63 Standard Cylinder SAI63AX850 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø63mm bore and 850mm 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
- Stroke850 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM16×1.5
- CushionAdjustable, 36 mm
About the Airtac SAI63 Standard Cylinder SAI63AX850
The AirTAC SAI63X850 is a double-acting ISO 15552 profile cylinder engineered for demanding linear motion tasks. Delivering a push force of 1559 N at 0.5 MPa and 2182 N at 0.7 MPa, this 63 mm bore unit utilizes an 850 mm stroke to execute extended travel cycles. Its extruded aluminum barrel design omits tie-rods, providing a clean profile that drops directly into standardized ISO 15552 mounting interfaces.
Built for durability, this specific configuration incorporates an SUS420J2 stainless steel piston rod (material code A) for enhanced corrosion resistance compared to standard carbon steel. It features PT tapered port threads (G3/8) for secure pneumatic connections. Because this model lacks the -S magnet suffix, it does not have integrated sensor grooves for reed switches; position detection must be handled externally if required.
Airtac SAI63 Standard Cylinder SAI63AX850 Technical Specifications
| Model | Airtac SAI63 Standard Cylinder SAI63AX850 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø63 mm |
| Stroke | 850 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 SAI63 Standard Cylinder SAI63AX850
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 63 | Bore size in mm. |
| ×850 | 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 SAI63 Standard Cylinder SAI63AX850 Is Used
Extended Transfer Lines
Pushes products or pallets over an 850 mm gap on extended material handling conveyors where 1559 N of force easily overcomes rolling friction.
High-Reach Palletizing
Actuates lifting arms in packaging cells, utilizing the long stroke to reach down into deep bins while the SUS420J2 rod resists moisture.
Large Door Actuation
Opens and closes heavy industrial machine guarding doors or blast gates, requiring the full 850 mm extension to clear the work zone.
Is the Airtac SAI63 Standard Cylinder SAI63AX850 the Right Cylinder?
Selecting this 63 mm bore over a smaller 50 mm option provides a substantial force upgrade, jumping from 982 N to 1559 N at 0.5 MPa push force. If your application requires even greater thrust, stepping up to the 80 mm bore yields 2513 N at the same pressure. The 850 mm stroke is well within the 1500 mm maximum standard stroke for this bore, but long unsupported rods are susceptible to bending under side loads. To prevent premature seal wear and rod-bearing failure, use external guide rails or a guided cylinder carriage for heavy offset loads.
As a standard double-acting cylinder, the SAI63X850 relies on live air pressure to move and maintain its position. If air is exhausted or pressure drops, the piston will drift and cannot hold a vertical load. For applications requiring true position holding without constant air pressure, consider the SAIL variant with an air-released lock or the BSAI bidirectional clamp-lock cylinder. Replacement and interchangeability are straightforward: match the 63 mm bore, 850 mm stroke, G3/8 PT ports, and appropriate mounting accessories like FA flanges or TC trunnions.
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 SAI63 Standard Cylinder SAI63AX850 FAQ
At an operating pressure of 0.5 MPa, the push force is 1559 N and the pull force is 1402 N. When increasing the pressure to 0.7 MPa, the push force reaches 2182 N.
Yes, the SAI63X850 is a true ISO 15552 profile cylinder, making its mounting dimensions fully interchangeable with other ISO 15552 standard cylinders of the same bore and stroke.
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