Airtac SAI63 Standard Cylinder SAI63X25
The AirTAC Airtac SAI63 Standard Cylinder SAI63X25 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø63mm bore and 25mm 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
- Stroke25 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM16×1.5
- CushionAdjustable, 36 mm
About the Airtac SAI63 Standard Cylinder SAI63X25
The AirTAC SAI63X25 is a double-acting ISO 15552 profile cylinder engineered for compact, high-force automation. Delivering a push force of 1559 N at 0.5 MPa, this 63 mm bore unit is built around an extruded aluminum barrel and operates seamlessly within a 0.15-1.0 MPa pressure range.
This specific 25 mm stroke variant is ideal for short-travel clamping and pressing tasks. It features a standard carbon steel piston rod and utilizes a PT tapered port thread. For high-temperature environments up to 70 C, the seal options can be upgraded to Viton, while the dual-side sensor grooves support CMSE or DMSE switches if a magnet is added later.
Airtac SAI63 Standard Cylinder SAI63X25 Technical Specifications
| Model | Airtac SAI63 Standard Cylinder SAI63X25 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø63 mm |
| Stroke | 25 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 SAI63X25
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 63 | Bore size in mm. |
| ×25 | 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 SAI63X25 Is Used
Short-Stroke Pressing
Ideal for stamping or pressing small components, utilizing the 1559 N push force at 0.5 MPa within a tight 25 mm travel limit.
Product Clamping
Provides robust, short-travel clamping on conveyor lines to hold workpieces securely during machining or packaging operations.
Ejector Mechanisms
Delivers rapid, high-force ejection of finished parts from molds or fixtures where a long stroke is unnecessary.
Is the Airtac SAI63 Standard Cylinder SAI63X25 the Right Cylinder?
Selecting this 63 mm bore model makes sense when the 50 mm bore (offering 982 N push at 0.5 MPa) is insufficient for your pressing or holding requirements. The 25 mm stroke is highly responsive and minimizes rod-bearing bending, making it perfect for short-travel operations. Because it is a profile-type cylinder, it drops in interchangeably with any other ISO 15552 standard cylinder using the same 63 mm bore, 25 mm stroke, G3/8 port, and standard mounting accessories like FA flanges or TC trunnions.
Keep in mind that a standard SAI cylinder relies on live air pressure to maintain its position. If your application loses air pressure, the piston will drift. For applications requiring strict load holding without continuous air supply, consider the SAIL variant with an air-released lock or the BSAI clamp-lock cylinder.
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 SAI63X25 FAQ
At 0.5 MPa operating pressure, the SAI63X25 generates a push force of 1559 N and a pull force of 1402 N. At the maximum operating pressure of 1.0 MPa, the theoretical push force reaches 318 kgf.
Yes, the SAI63X25 is a genuine ISO 15552 profile cylinder, making its mounting interface dimensionally interchangeable with other ISO 15552 cylinders of the same bore and stroke. It is not a tie-rod design, ensuring a clean exterior profile.
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