Airtac SAI125 Standard Air Cylinder SAI125BX55
The AirTAC Airtac SAI125 Standard Air Cylinder SAI125BX55 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 55mm 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
- Stroke55 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAI125 Standard Air Cylinder SAI125BX55
The AirTAC SAI125X55 is a double-acting ISO 15552 profile cylinder engineered for heavy-duty operations, delivering a robust push force of 6136 N at 0.5 MPa. Its 55 mm stroke is a made-to-order dimension tailored for short, high-force clamping or ejection tasks. The extruded aluminum barrel design omits traditional tie rods, ensuring a clean exterior while maintaining strict dimensional interchangeability with other ISO 15552 standard cylinders.
This specific configuration features a SUS304 stainless steel piston rod (material code B), providing superior corrosion resistance for humid or chemically exposed environments. It utilizes PT tapered port threads and operates without a magnet, meaning direct position sensing via reed switches is not supported on this unit. Adjustable air cushions at both stroke ends absorb impact energy effectively within its 30-500 mm/s speed range.
Airtac SAI125 Standard Air Cylinder SAI125BX55 Technical Specifications
| Model | Airtac SAI125 Standard Air Cylinder SAI125BX55 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 55 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 SAI125BX55
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×55 | 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 SAI125BX55 Is Used
High-Force Stamping
Executes short-stroke stamping and forming operations where 6136 N of push force is required to deform or mark heavy materials.
Heavy Duty Clamping
Secures large weldments or bulky components during machining, utilizing the SUS304 rod to resist corrosive cutting fluids.
Pallet Ejection
Provides robust, short-throw ejection of finished pallets from high-throughput packaging lines without occupying excessive machine footprint.
Is the Airtac SAI125 Standard Air Cylinder SAI125BX55 the Right Cylinder?
Select this 125 mm bore when an application demands significantly more thrust than a 100 mm bore can provide (3927 N at 0.5 MPa), but requires a compact stroke. Because this 55 mm stroke is non-standard, expect a slightly longer lead time for made-to-order fulfillment. The PT tapered port ensures a tight, metal-to-metal seal ideal for high-flow pneumatic circuits.
For applications requiring the load to remain securely held in place during a complete loss of air pressure, the standard SAI is unsuitable since air cushions only decelerate the piston and do not lock it. In such fail-safe scenarios, consider the SAIL variant with an air-released lock or the BSAI bidirectional clamp-lock cylinder. To mount this ISO 15552 profile cylinder, utilize standard TC trunnion 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 SAI125BX55 FAQ
At 0.5 MPa operating pressure, the push force is 6136 N and the pull force is 5734 N. If pressure is increased to 0.7 MPa, the push force reaches 8590 N.
No, the standard SAI cylinder will drift or drop under load without live air pressure, as the adjustable cushions only decelerate the piston near stroke end. For fail-safe load holding, use the SAIL (air-released lock) or BSAI (clamp-lock) variants.
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 SAI125BX55
Send us the quantity and destination. We confirm price, stock and lead time — usually within 7-8 hours.