Airtac SAI125 Standard Air Cylinder SAI125BX280S
The AirTAC Airtac SAI125 Standard Air Cylinder SAI125BX280S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 280mm 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
- Stroke280 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAI125 Standard Air Cylinder SAI125BX280S
The AirTAC SAI125X280-S is a double-acting ISO 15552 profile cylinder engineered for heavy-duty automation. Delivering a push force of 6136 N and a pull force of 5734 N at 0.5 MPa, this 125mm bore unit handles substantial loads. The 280mm stroke is optimal for moving large packaging assemblies or executing heavy clamping operations. Equipped with a -S magnet, it integrates seamlessly with CMSE and DMSE sensor switches via the dual side grooves on the extruded aluminum barrel.
Reflecting the exact configuration requested, this model features a SUS304 stainless steel piston rod (code B) for superior corrosion resistance in humid or washdown environments. It utilizes PT tapered port threads and includes adjustable air cushions at both ends to decelerate massive loads smoothly. As a genuine AirTAC component, it provides a reliable, drop-in replacement for any ISO 15552 dimensionally interchangeable cylinder.
Airtac SAI125 Standard Air Cylinder SAI125BX280S Technical Specifications
| Model | Airtac SAI125 Standard Air Cylinder SAI125BX280S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 280 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 SAI125BX280S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×280 | 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 SAI125BX280S Is Used
Heavy Stamping
Provides the robust 6136 N push force required to actuate large mechanical stamping presses and forming dies.
Pallet Handling
Uses the 280mm stroke to lift and position fully loaded pallets within automated distribution and warehousing centers.
Automated Welding
Leverages the SUS304 stainless steel rod to resist weld spatter and maintain reliable clamping pressure on robotic welding lines.
Is the Airtac SAI125 Standard Air Cylinder SAI125BX280S the Right Cylinder?
Selecting this 125mm bore is ideal when 80mm cylinders lack the necessary thrust, as stepping up from an 80mm bore significantly increases your output from 2513 N to 6136 N at 0.5 MPa. If your application requires less force, dropping to a 100mm bore yields 3927 N while saving valuable mounting space.
Because the 280mm stroke exceeds the 300mm threshold, careful attention to side load is critical. An unsupported rod of this length can bend under lateral forces, causing premature rod-bearing wear. Implement external guide rails or choose a guided cylinder to absorb lateral momentum. For tasks that must maintain position without continuous air pressure, note that the standard adjustable cushion only decelerates the piston and does not act as a brake; integrate an external pilot-operated check valve or specify a SAIL lock variant for secure load holding.
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 SAI125BX280S FAQ
At an operating pressure of 0.5 MPa, this 125mm bore cylinder generates a push force of 6136 N and a pull force of 5734 N. If pressure is increased to 0.7 MPa, the push force rises to 8590 N.
Yes, the SAI125X280-S is dimensionally interchangeable per ISO 15552. You can use it as a drop-in replacement for other ISO 15552 profile cylinders of the same bore and stroke, provided you match the PT port and mounting accessories.
Authorized Export Seller
Genuine AirTAC parts produced by AirTAC factory.
1-Year Warranty
Covers non-human-caused product damage.
Fast Dispatch
Standard models usually ship in 3-4 days.
Fast Reply
Most inquiries answered within 7-8 hours.
Related AirTAC SAI Cylinders
Request a Quote for Airtac SAI125 Standard Air Cylinder SAI125BX280S
Send us the quantity and destination. We confirm price, stock and lead time — usually within 7-8 hours.