Airtac SAI125 Standard Air Cylinder SAI125BX145S
The AirTAC Airtac SAI125 Standard Air Cylinder SAI125BX145S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 145mm 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
- Stroke145 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAI125 Standard Air Cylinder SAI125BX145S
The AirTAC SAI125X145-S is a double-acting ISO 15552 profile cylinder engineered for heavy-duty automation. Delivering a robust 6136 N push force at 0.5 MPa, this 125 mm bore actuator handles substantial loads effortlessly. The 145 mm stroke provides the precise travel distance required for clamping, lifting, and press operations. Its extruded aluminum barrel design strictly adheres to ISO 15552 dimensional standards, guaranteeing a drop-in replacement for any compatible ISO 15552 cylinder footprint.
This specific configuration includes a SUS304 stainless steel rod (material code B) for superior corrosion resistance in humid or washdown environments. The -S suffix denotes an integrated piston magnet, enabling seamless position detection with CMSE or DMSE series reed switches along the dual sensor grooves. Fluid ports feature PT tapered threading, and the unit relies on adjustable air cushions at both ends to decelerate the piston smoothly across its 30-500 mm/s operating speed range.
Airtac SAI125 Standard Air Cylinder SAI125BX145S Technical Specifications
| Model | Airtac SAI125 Standard Air Cylinder SAI125BX145S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 145 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 SAI125BX145S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×145 | 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 SAI125BX145S Is Used
Heavy-Duty Stamping
Provides the 6136 N push force required to form and stamp thick metal components in automated fabrication lines.
Pallet Diverting
Lifts and diverts heavy loaded pallets along conveyor systems, utilizing the 145 mm stroke to clear adjacent lanes.
Injection Molding Extraction
Handles the robust extraction of dense molded parts from hot machinery, leveraging the SUS304 rod for durability.
Is the Airtac SAI125 Standard Air Cylinder SAI125BX145S the Right Cylinder?
Selecting this 125 mm bore over the smaller 100 mm variant upgrades your thrust from 3927 N to 6136 N at 0.5 MPa, whereas stepping up to the 160 mm bore yields 10053 N. For applications needing 145 mm of travel, this standard stroke avoids the premium costs of made-to-order lengths. Because the stroke is under 300 mm, rod-bearing bending stress is minimal, though external guides should still manage any heavy lateral payloads.
Note that the adjustable air cushions only decelerate the piston near stroke ends; they do not lock or hold the load. If your machinery loses air pressure, the piston will drift. For strict fail-safe position holding, specify the SAIL variant with an air-released lock, or the BSAI bidirectional clamp-lock cylinder. To mount this actuator, choose from standard ISO 15552 accessories like TC trunnion or FA flanges, and ensure you order the correct CMSE/DMSE switches for the -S magnet.
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 SAI125BX145S FAQ
At 0.5 MPa, this 125 mm bore cylinder provides 6136 N of push force and 5734 N of pull force. If you increase the operating pressure to 0.7 MPa, the push force rises to 8590 N.
No, the standard SAI cylinder cannot hold a load without continuous air pressure; the piston will drop if air is lost. The built-in air cushions only decelerate the piston at stroke end. For secure load holding, use the SAIL variant with an air-released lock or an external rod lock.
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