Airtac SAI125 Standard Air Cylinder SAI125BX270
The AirTAC Airtac SAI125 Standard Air Cylinder SAI125BX270 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 270mm 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
- Stroke270 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAI125 Standard Air Cylinder SAI125BX270
The AirTAC SAI125X270 is a double-acting ISO 15552 profile cylinder engineered for heavy-duty automation. Operating at 0.7 MPa, it generates a substantial 8590 N of push force and 5734 N of pull force. Because the 270 mm stroke falls outside the standard increments, this unit is produced as a made-to-order configuration to match your exact linear motion requirements.
This model features a robust SUS304 stainless steel piston rod (option B) for superior corrosion resistance in harsh environments. It utilizes PT tapered port threads and includes adjustable air cushions at both ends to manage kinetic energy. Note that because a magnet for sensors was not specified, integrated magnetic switching is not enabled on this specific unit.
Airtac SAI125 Standard Air Cylinder SAI125BX270 Technical Specifications
| Model | Airtac SAI125 Standard Air Cylinder SAI125BX270 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 270 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 SAI125BX270
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×270 | 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 SAI125BX270 Is Used
Heavy Stamping
Provides the high kinetic energy and 8590 N force required to drive heavy stamping and forming presses.
Automotive Assembly
Handles robust clamping and positioning of large automotive chassis components during robotic welding.
Pallet Diverting
Actuates high-mass pallet diverters and heavy-duty sorting gates on automated packaging lines.
Is the Airtac SAI125 Standard Air Cylinder SAI125BX270 the Right Cylinder?
When evaluating force requirements, stepping down to a 100 mm bore yields 5497 N at 0.7 MPa, which may suffice for lighter payloads. Conversely, moving up to a 160 mm bore provides 14074 N for significantly heavier lifting. Because this 270 mm stroke is non-standard, expect a slightly extended lead time for manufacturing.
For strokes of this length, side loads can cause rod-bearing bending and premature wear; utilizing an external guide rail or a guided cylinder mechanism is highly recommended to maintain alignment. If your machinery must hold a load vertically without continuous air pressure, this standard cylinder will drift; you should integrate an external pilot-operated check valve or specify the SAIL (air-released lock) variant. As a true ISO 15552 profile cylinder, it serves as a drop-in dimensional replacement for other ISO 15552 cylinders, matching the 125 mm bore, 270 mm stroke, PT G1/2 port, and standard mounting accessories like the TC trunnion.
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 SAI125BX270 FAQ
At an operating pressure of 0.7 MPa, this 125 mm bore cylinder generates 8590 N of push force and 5734 N of pull force.
No, the standard SAI cylinder will drift and drop its load if air pressure is lost or exhausted. For position holding, use the SAIL (with lock) variant or an external rod lock.
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 SAI125BX270
Send us the quantity and destination. We confirm price, stock and lead time — usually within 7-8 hours.