Airtac SAI125 Standard Air Cylinder SAI125X65S
The AirTAC Airtac SAI125 Standard Air Cylinder SAI125X65S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 65mm 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
- Stroke65 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAI125 Standard Air Cylinder SAI125X65S
The AirTAC SAI125X65-S is a double-acting ISO 15552 profile cylinder engineered for heavy-duty linear motion. Delivering a robust push force of 6136 N at 0.5 MPa, it is designed around an extruded aluminum barrel that completely eliminates traditional tie-rods. This specific 65 mm stroke is a non-standard, made-to-order configuration tailored for compact, high-thrust applications where space is restricted.
Because this unit includes the -S magnet option, it is fully compatible with CMSE and DMSE series reed switches. The barrel features integrated sensor grooves on both sides for flexible mounting. The standard carbon steel piston rod provides excellent tensile strength, while the adjustable air cushions at both ends ensure smooth deceleration of heavy payloads across its 30-500 mm/s operating speed range.
Airtac SAI125 Standard Air Cylinder SAI125X65S Technical Specifications
| Model | Airtac SAI125 Standard Air Cylinder SAI125X65S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 65 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 SAI125X65S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×65 | 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 SAI125X65S Is Used
Heavy Metal Stamping
Provides the substantial 6136 N push force required to seat and hold heavy dies or stamp metal components securely in place.
Large Clamp Actuation
Ideal for actuating large-scale clamping fixtures in automotive assembly lines where a short 65 mm stroke delivers rapid, high-force gripping.
Pallet Positioning Stops
Functions as a robust pop-up stopper for heavy pallets on roller conveyors, using its short stroke to halt loads quickly without protruding far.
Is the Airtac SAI125 Standard Air Cylinder SAI125X65S the Right Cylinder?
Choose this 125 mm bore when a 100 mm bore falls short—yielding 3927 N at 0.5 MPa—and you need the next step up in thrust. For applications requiring intermediate strokes, this custom 65 mm travel prevents wasted cycle time compared to standard 75 mm or 50 mm options. The PT tapered port threads ensure a robust, leak-free pneumatic connection.
Remember that an unmodified SAI cylinder relies entirely on live air pressure to maintain its position; if air is lost or exhausted, the piston will drift. The adjustable end cushions only decelerate the stroke and do not function as a locking brake. If your machinery requires fail-safe load holding, consider the SAIL (air-released lock) or BSAI (bidirectional clamp-lock) variants instead of a standard SAI.
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 SAI125X65S FAQ
At a standard operating pressure of 0.5 MPa, this 125 mm bore cylinder generates a push force of 6136 N. At 0.7 MPa, the push force increases to 8590 N.
Yes. The SAI series is dimensionally interchangeable per ISO 15552, meaning it shares standardized mounting interfaces and can serve as a drop-in replacement for other ISO 15552 profile cylinders.
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