Airtac SAI63 Standard Cylinder SAI63AX250
The AirTAC Airtac SAI63 Standard Cylinder SAI63AX250 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø63mm bore and 250mm 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
- Stroke250 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM16×1.5
- CushionAdjustable, 36 mm
About the Airtac SAI63 Standard Cylinder SAI63AX250
The AirTAC SAI63X250 is a double-acting ISO 15552 profile cylinder engineered to deliver 1559 N of push force at 0.5 MPa and 2182 N at 0.7 MPa. Its extruded aluminum barrel omits tie-rods, providing a clean, standardized housing that drops directly into existing ISO 15552 mounting interfaces. The 250 mm stroke is well-suited for mid-range linear actuation tasks requiring substantial reach and power.
This specific configuration features a SUS420J2 stainless steel piston rod (material code A) for enhanced corrosion resistance compared to standard carbon steel. Fluid ports utilize a PT tapered thread type, and the barrel incorporates dual-side sensor grooves. Without a magnet, this base model is optimized for straightforward pneumatic control rather than position sensing.
Airtac SAI63 Standard Cylinder SAI63AX250 Technical Specifications
| Model | Airtac SAI63 Standard Cylinder SAI63AX250 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø63 mm |
| Stroke | 250 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 SAI63AX250
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 63 | Bore size in mm. |
| ×250 | 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 SAI63AX250 Is Used
Component Ejection
Provides the 1559 N force needed to push finished metal parts out of a machining center, utilizing the 250 mm stroke to clear the work envelope entirely.
Pallet Diversion
Actuates a heavy-duty diverter arm on a packaging line, where the robust 63 mm profile cylinder withstands repeated impacts during high-speed sorting.
Case Erecting
Folds and secures large corrugated cartons, requiring the extended 250 mm travel to reach across wide packaging frames.
Is the Airtac SAI63 Standard Cylinder SAI63AX250 the Right Cylinder?
Selecting this 63 mm bore makes sense when a 50 mm bore (982 N push at 0.5 MPa) lacks the necessary thrust, but an 80 mm bore (2513 N at 0.5 MPa) would be physically oversized. The 250 mm stroke provides ample extension for indexing and lifting platforms. Because the stroke is 250 mm, designers should verify that side loads are minimized; for applications involving heavy off-center loads, utilize external guide rails to prevent rod-bearing wear.
As a standard double-acting cylinder, the SAI63X250 relies on continuous air pressure to maintain its position. If air is exhausted, the piston will drift, so safety-critical holding applications require the SAIL variant with an air-released lock or an external pilot-operated check valve. Replacement is straightforward: match the 63 mm bore, 250 mm stroke, PT G3/8 port, and choose appropriate FA flange or TC trunnion accessories.
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 SAI63AX250 FAQ
At 0.5 MPa, this 63 mm bore cylinder generates 1559 N of push force and 1402 N of pull force. If operating pressure increases to 0.7 MPa, the push force rises to 2182 N.
Yes, the SAI63X250 is dimensionally interchangeable per ISO 15552. It shares standard mounting dimensions with other ISO 15552 profile cylinders, allowing it to serve as a drop-in replacement without modifying the machine frame.
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