Airtac SAI125 Standard Air Cylinder SAI125X35
The AirTAC Airtac SAI125 Standard Air Cylinder SAI125X35 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 35mm 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
- Stroke35 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAI125 Standard Air Cylinder SAI125X35
The AirTAC SAI125X35 is a double-acting ISO 15552 profile cylinder engineered for heavy-duty operations, delivering a substantial push force of 6136 N at just 0.5 MPa. Its 35 mm stroke is a made-to-order length designed specifically for short-travel, high-thrust clamping and pressing tasks. The extruded aluminum barrel omits tie rods, presenting a clean exterior that integrates smoothly into modern automated machinery.
Built to handle demanding environments, this specific configuration features a robust carbon steel piston rod and PT (tapered) port threads. The barrel includes sensor grooves on both sides for direct mounting of CMSE or DMSE switches, though a magnet (-S option) is required for magnetic sensing. For applications requiring end-of-stroke locking, the SAIL variant offers an integrated air-released lock mechanism.
Airtac SAI125 Standard Air Cylinder SAI125X35 Technical Specifications
| Model | Airtac SAI125 Standard Air Cylinder SAI125X35 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 35 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 SAI125X35
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×35 | 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 SAI125X35 Is Used
Heavy Metal Stamping
Provides the high impact force needed for short-stroke stamping and forming operations in automotive component manufacturing.
Industrial Clamping Jigs
Secures large workpieces firmly in heavy machining centers, utilizing the 6136 N push force to prevent movement during cutting.
Injection Molding Ejectors
Delivers robust ejection power to free dense plastic parts from molds, ensuring reliable cycle times in high-volume production.
Is the Airtac SAI125 Standard Air Cylinder SAI125X35 the Right Cylinder?
Selecting this 125 mm bore is ideal when 100 mm bore cylinders (providing 3927 N push at 0.5 MPa) lack the necessary power for heavy stamping or lifting. The 35 mm stroke keeps the overall length highly compact, minimizing space requirements within tight machine envelopes. Because 35 mm is a non-standard stroke, expect a made-to-order fulfillment timeline.
When integrating this cylinder, ensure the mounting interface matches your ISO 15552 footprint, utilizing appropriate accessories like FA flanges or TC trunnions based on the load orientation. Note that a standard SAI cylinder relies entirely on live air pressure to hold its load; if pneumatic supply is lost, the piston will drift. For fail-safe load holding without continuous air pressure, specify the BSAI bidirectional clamp-lock variant or utilize an external rod lock. The operating speed range for this 125 mm bore is 30-500 mm/s.
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 SAI125X35 FAQ
At an operating pressure of 0.5 MPa, the SAI125X35 cylinder generates a push force of 6136 N and a pull force of 5734 N. At 0.7 MPa, the push force increases to 8590 N.
Yes, the SAI125X35 is dimensionally interchangeable per ISO 15552 standards, making it a drop-in replacement for other ISO 15552 profile cylinders. It uses a G1/2 port and standard mounting accessories.
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