Airtac SAI63 Standard Cylinder SAI63X125STC
The AirTAC SAI63 Standard Cylinder SAI63X125STC is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø63mm bore and 125mm stroke, G3/8 air ports and adjustable end cushioning. Its standardized mounting interface makes it interchangeable with other ISO 15552 cylinders at the mounting interface.
- BoreØ63 mm
- Stroke125 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM16×1.5
- CushionAdjustable, 36 mm
- No minimum order. A single piece can be ordered.
- Ready in 3–5 business days. That is the time we take to process the order and hand it to the carrier. Transit time after that depends on the destination.
About the Airtac SAI63 Standard Cylinder SAI63X125STC
The AirTAC SAI63X125-S is a double-acting ISO 15552 profile cylinder engineered for rigorous automation environments. Operating at 0.15-1.0 MPa, it generates 1559 N of push force and 1402 N of pull force at 0.5 MPa. The 125 mm stroke provides optimal travel for mid-cycle positioning tasks. As a tie-rod-less extruded aluminum barrel design, it maintains strict dimensional interchangeability with other ISO 15552 standards.
This specific configuration includes a pre-installed magnet (-S) enabling seamless integration with CMSE and DMSE series reed switches via the dual-side sensor grooves. The piston rod is constructed from durable carbon steel, and the tapered PT port threads ensure a robust, leak-free pneumatic connection. Adjustable air cushions at both ends allow precise end-of-stroke deceleration for moving loads.
Airtac SAI63 Standard Cylinder SAI63X125STC Technical Specifications
| Model | Airtac SAI63 Standard Cylinder SAI63X125STC |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø63 mm |
| Stroke | 125 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 SAI63X125STC
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 63 | Bore size in mm. |
| ×125 | 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 SAI63X125STC Is Used
Automated Assembly Clamping
Provides 1559 N of clamping thrust at 0.5 MPa, securely holding components during robotic fastening or welding processes.
Material Diverting
The 125 mm stroke actuates diverter gates smoothly on packaging lines, with adjustable cushions absorbing kinetic energy at stroke ends.
Press Ejection Systems
Delivers rapid 30-800 mm/s ejection of finished parts from light-duty presses, utilizing the carbon steel rod for repeated impact resistance.
Is the Airtac SAI63 Standard Cylinder SAI63X125STC the Right Cylinder?
When evaluating bore sizes, stepping down to a 50 mm bore yields 982 N of push force at 0.5 MPa, which may be insufficient for higher friction loads. Stepping up to an 80 mm bore provides 2513 N, offering a robust safety margin for heavier tooling. The 125 mm stroke avoids the structural bending risks associated with longer strokes, though side-load management is always recommended.
For applications requiring the piston to maintain its position upon a complete loss of air pressure, remember that the standard adjustable air cushion only decelerates the piston near the stroke end and does not function as a locking brake. In such fail-safe scenarios, consider deploying the SAIL variant with an air-released lock or the BSAI bidirectional clamp-lock cylinder. This model features a TC trunnion mount and a -S magnet for sensor compatibility.
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 SAI63X125STC FAQ
At an operating pressure of 0.5 MPa, the SAI63X125-S generates a push force of 1559 N and a pull force of 1402 N. At 0.7 MPa, the push force increases to 2182 N.
Yes, the SAI63X125-S is dimensionally interchangeable per ISO 15552 standards, allowing it to serve as a direct replacement for other cylinders matching this mounting interface. It features a TC mount and PT threaded ports.
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