Airtac SAI125 Standard Air Cylinder SAI125AX15
The AirTAC Airtac SAI125 Standard Air Cylinder SAI125AX15 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 15mm stroke, G1/2 air ports and adjustable end cushioning. Its standardized mounting interface makes it a drop-in replacement for other ISO 15552 cylinders in automation lines.
- BoreØ125 mm
- Stroke15 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAI125 Standard Air Cylinder SAI125AX15
The AirTAC SAI125X15 is a double-acting ISO 15552 profile-barrel cylinder engineered for heavy-duty short-stroke tasks. Delivering 6136 N of push force at 0.5 MPa, it is purpose-built for high-impact clamping and pressing. This specific 15 mm stroke is a non-standard, made-to-order configuration designed for ultra-compact high-force actuation.
Beyond the standard thrust ratings, this unit is configured with a SUS420J2 stainless steel piston rod (material code A) for superior corrosion resistance and surface hardness. It utilizes PT tapered port threads, and because a magnet option (-S) is not specified, it operates without integrated magnetic sensing.
Airtac SAI125 Standard Air Cylinder SAI125AX15 Technical Specifications
| Model | Airtac SAI125 Standard Air Cylinder SAI125AX15 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 15 mm |
| Acting type | Double acting |
| Port size | G1/2 |
| Rod thread | M27×2 |
| 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 – 500 mm/s |
| Cushion | Adjustable, 40 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 (Ø125mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 6136 N | 5734 N |
| 0.7 MPa | 8590 N | — |
| Max (@1.0 MPa) | 1251 kgf | |
Actual usable force is lower than theoretical due to friction and back-pressure. Size with a safety margin.
Model Code: Airtac SAI125 Standard Air Cylinder SAI125AX15
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×15 | 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 SAI125 Standard Air Cylinder SAI125AX15 Is Used
Heavy-Duty Stamping
Provides the intense 6136 N impact force required for short-travel metal forming and riveting operations.
Industrial Clamping
Secures large molds or heavy fabricated components securely in place during machining or welding processes.
High-Force Ejection
Ejects dense, heavy finished parts from presses or injection molds within a very tight spatial footprint.
Is the Airtac SAI125 Standard Air Cylinder SAI125AX15 the Right Cylinder?
Selecting this 125 mm bore provides massive thrust (6136 N at 0.5 MPa) within a very short 15 mm travel, ideal where extreme force is needed but space is strictly limited. If your application requires slightly less force, stepping down to the 100 mm bore yields 3927 N at 0.5 MPa.
Because the SAI is a standard double-acting cylinder, it relies on adjustable air cushions at both ends to decelerate the piston. It does not inherently hold a load if air pressure is lost or exhausted; for vertical loads requiring fail-safe positioning, consider the SAIL (air-released lock) or BSAI (bidirectional clamp-lock) variants. As a true ISO 15552 profile cylinder, it serves as a dimensionally interchangeable drop-in replacement for other ISO 15552 cylinders, matching the 125 mm bore, PT G1/2 port, and standard mounting 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 SAI125 Standard Air Cylinder SAI125AX15 FAQ
This 125 mm bore cylinder generates 6136 N of push force and 5734 N of pull force at 0.5 MPa. At 0.7 MPa, the push force increases to 8590 N.
No, the standard SAI series relies on air pressure for movement and adjustable air cushions for end-of-stroke deceleration. It will drift if pressure is lost. For secure vertical load holding, use the SAIL (with air-released lock) or BSAI (clamp-lock) variants.
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