Airtac SAI125 Standard Air Cylinder SAI125BX45
The AirTAC Airtac SAI125 Standard Air Cylinder SAI125BX45 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 45mm 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
- Stroke45 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAI125 Standard Air Cylinder SAI125BX45
The AirTAC SAI125X45 is a double-acting ISO 15552 profile cylinder engineered for heavy-duty operations, generating 6136 N of push force at 0.5 MPa. Its 45 mm stroke is a custom non-standard dimension, making it a specialized made-to-order solution for short-travel, high-force actuation. The extruded aluminum barrel omits tie-rods for a cleaner exterior.
This specific configuration is built with a SUS304 stainless steel piston rod (option B) for superior corrosion resistance in harsh environments. Fluid ports feature PT (tapered) threading, and the barrel includes dual-sided sensor grooves for direct mounting of CMSE or DMSE switches if a magnet is added later.
Airtac SAI125 Standard Air Cylinder SAI125BX45 Technical Specifications
| Model | Airtac SAI125 Standard Air Cylinder SAI125BX45 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 45 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 SAI125BX45
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×45 | 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 SAI125BX45 Is Used
Heavy Stamping
Provides the robust 6136 N push force required to actuate heavy-duty stamping and forming presses within a tight 45 mm travel window.
High-Force Clamping
Ideal for securing heavy metal workpieces during machining operations, utilizing its short stroke and massive thrust for rigid holding.
Valve Actuation
Drives large industrial process valves or heavy mechanical linkages where a compact stroke but substantial output force is mandatory.
Is the Airtac SAI125 Standard Air Cylinder SAI125BX45 the Right Cylinder?
Selecting this 125 mm bore over the 100 mm variant doubles the available thrust, stepping up from 3927 N to 6136 N at 0.5 MPa. If your application requires even less travel, the SAIJ adjustable-stroke variant offers flexible end-position tuning. Because the 45 mm stroke is a non-standard dimension, expect a slightly longer lead time for made-to-order production.
As a standard double-acting cylinder, this model relies on live air pressure to maintain its position. If the air supply is exhausted or drops, the piston will drift and cannot hold a load. For safety-critical vertical loads requiring fail-safe holding, utilize the SAIL (air-released lock) or BSAI (bidirectional clamp-lock) series instead. This unit serves as a direct dimensional drop-in replacement per ISO 15552 mounting interfaces, utilizing a G1/2 (PT tapered) port, and supports standard LB foot or FA flange 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 SAI125BX45 FAQ
At an operating pressure of 0.5 MPa, this 125 mm bore cylinder generates 6136 N of push force and 5734 N of pull force. At 0.7 MPa, the push force increases to 8590 N.
Yes, the SAI125X45 is a genuine ISO 15552 profile cylinder, making its mounting interface dimensionally interchangeable with other ISO 15552 cylinders. You can use standard FA flanges or CA clevis mounts for a direct drop-in replacement.
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