Airtac SAI63 Standard Cylinder SAI63X25S
The AirTAC Airtac SAI63 Standard Cylinder SAI63X25S 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 SAI63X25S
The AirTAC SAI63X25-S is a double-acting ISO 15552 profile cylinder engineered for short-stroke actuation. It delivers a push force of 1559 N and a pull force of 1402 N at 0.5 MPa, making it well-suited for high-force clamping and ejecting tasks in confined spaces. The extruded aluminum barrel design omits tie rods, providing a clean exterior that simplifies mounting and sensor placement.
This specific configuration includes a piston magnet for use with CMSE and DMSE reed switches, fitting neatly into the dual sensor grooves machined on both sides of the barrel. It features a standard carbon steel piston rod and PT (tapered) port threads. For applications requiring higher heat resistance, the seal stack can be upgraded from standard TPU to Viton (H) or NBR (N) elastomers.
Airtac SAI63 Standard Cylinder SAI63X25S Technical Specifications
| Model | Airtac SAI63 Standard Cylinder SAI63X25S |
|---|---|
| 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 SAI63X25S
| 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 SAI63X25S Is Used
High-Force Part Ejection
Uses the 1559 N push force at 0.5 MPa to reliably eject dense metal stampings from a press die within a tight 25 mm stroke envelope.
Short-Stroke Clamping
Secures heavy automotive components during machining operations, utilizing the robust 63 mm bore carbon steel rod for rigid holding.
Package Diverting
Provides rapid actuation for a diverting gate on a packaging line, where the integrated magnet triggers DMSE switches to confirm end-of-stroke positions.
Is the Airtac SAI63 Standard Cylinder SAI63X25S the Right Cylinder?
Selecting this 63 mm bore over the smaller 50 mm version upgrades your push force from 982 N to 1559 N at 0.5 MPa, which is critical if you need extra clamping authority without increasing air pressure. Conversely, if your application only requires 879 N of push force, stepping down to the 40 mm bore saves valuable space and air consumption.
Because the stroke is only 25 mm, side-load stress on the rod bearing is minimal. However, if your mechanism loses air pressure, this standard cylinder cannot hold a load in place and the piston will drift. For vertical loads that must remain secure during a pressure drop, specify the SAIL variant with an air-released lock or use an external pilot-operated check valve. As a true ISO 15552 cylinder, it is dimensionally interchangeable with other ISO 15552 profile cylinders, allowing seamless integration using standard FA flanges or LB foot mounts.
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 SAI63X25S FAQ
At an operating pressure of 0.5 MPa, this 63 mm bore cylinder generates a push force of 1559 N and a pull force of 1402 N. If you increase the pressure to 0.7 MPa, the push force rises to 2182 N.
Yes. The SAI63X25-S is a genuine ISO 15552 profile cylinder, meaning its mounting interface and envelope dimensions are interchangeable with other standard ISO 15552 cylinders. You can directly swap it using your existing FA flanges or LB foot mounts.
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