Airtac SAI63 Standard Cylinder SAI63X850
The AirTAC Airtac SAI63 Standard Cylinder SAI63X850 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 SAI63X850
The AirTAC SAI63X850 is a double-acting ISO 15552 profile cylinder featuring an 850mm stroke and a 63mm bore. It provides a robust push force of 1559N at 0.5MPa, making it well-suited for driving heavy fixtures over extended distances. The extruded aluminum barrel design omits tie rods, offering a clean exterior that resists mechanical snagging.
This specific configuration includes a standard carbon steel piston rod and PT tapered port threads. It lacks an internal magnet, so it requires external proximity sensors if position detection is needed. For environments requiring higher heat resistance, the cylinder can be specified with Viton (H) seals instead of the standard TPU elastomers.
Airtac SAI63 Standard Cylinder SAI63X850 Technical Specifications
| Model | Airtac SAI63 Standard Cylinder SAI63X850 |
|---|---|
| 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 SAI63X850
| 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 SAI63X850 Is Used
Extended Material Transfer
Ideal for pushing heavy pallets or workpieces across long conveyor stretches where a 850mm stroke is necessary to bridge machine gaps.
Large Fixture Positioning
Provides the 1559N force needed to shift heavy machining fixtures into and out of the working envelope over a broad travel distance.
Automated Storage Retrieval
Suitable for automated warehousing gantries that require reliable extension and retraction of lifting or pushing arms over long vertical or horizontal axes.
Is the Airtac SAI63 Standard Cylinder SAI63X850 the Right Cylinder?
With an 850mm stroke, this 63mm bore falls within the standard limit of 1500mm but requires careful attention to side loading. Long unsupported rods are prone to bending under lateral forces; utilizing an external guide rail or a fully guided cylinder mechanism is strongly recommended to prevent premature rod-bearing wear.
If an application loses air pressure, this standard SAI model will not hold its load in place—the piston drifts when the valve centers. A drop-in ISO 15552 replacement requires matching the 63mm bore, 850mm stroke, G3/8 port, and mounting accessories like FA flanges. For position holding without live pressure, consider the SAIL (air-released lock) variant.
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 SAI63X850 FAQ
At 0.5MPa operating pressure, the SAI63X850 generates a push force of 1559N and a pull force of 1402N. At 0.7MPa, the push force increases to 2182N.
No, the standard SAI cylinder relies on adjustable air cushions for end-of-stroke deceleration only. It cannot hold a load without live pressure. For vertical load holding, use the SAIL variant with an air-released lock or an external rod lock.
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