Airtac SAI125 Standard Air Cylinder SAI125BX475S
The AirTAC Airtac SAI125 Standard Air Cylinder SAI125BX475S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 475mm 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
- Stroke475 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAI125 Standard Air Cylinder SAI125BX475S
The AirTAC SAI125X475-S is a double-acting ISO 15552 profile cylinder engineered for heavy-duty automation, delivering a substantial push force of 8590 N at 0.7 MPa. This 475 mm stroke is a standard length within the 125 mm bore range, making it highly suitable for long-travel material handling and large press operations. As a tie-rod-less extruded aluminum profile barrel, it offers a clean, modern design while maintaining strict dimensional interchangeability with other ISO 15552 cylinders.
This specific configuration includes a SUS304 stainless steel piston rod (material code B) for superior corrosion resistance in harsh or washdown environments. It is built with the -S magnet option, allowing seamless integration with CMSE and DMSE sensor switches housed in the dual-side sensor grooves. Fluid ports are PT (tapered) thread type, and the unit features adjustable air cushions at both ends to absorb kinetic energy, operating efficiently at speeds of 30-500 mm/s.
Airtac SAI125 Standard Air Cylinder SAI125BX475S Technical Specifications
| Model | Airtac SAI125 Standard Air Cylinder SAI125BX475S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 475 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 SAI125BX475S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×475 | 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 SAI125BX475S Is Used
Heavy-Duty Stamping
Provides the robust linear force required for large-scale metal forming, stamping, and press operations in automotive manufacturing.
Bulk Material Diversion
Actuates heavy diverter gates and sorting arms on high-capacity packaging lines, utilizing the 475 mm stroke for wide belt transitions.
Large Assembly Jigs
Drives substantial clamping fixtures and positioning jigs in heavy equipment assembly, where the SUS304 rod resists environmental contamination.
Is the Airtac SAI125 Standard Air Cylinder SAI125BX475S the Right Cylinder?
When sizing this cylinder, compare its 8590 N output at 0.7 MPa with the neighboring 100 mm bore, which yields 5497 N under the same pressure. If your application demands even greater thrust, stepping up to the 160 mm bore provides 14074 N. For this 475 mm stroke, it is critical to manage side loads; long unsupported rods are prone to bending under lateral forces. We recommend using an external guide rail or a guided cylinder carriage to prevent premature rod-bearing wear and ensure smooth linear travel.
Because this is a standard double-acting cylinder, it will not hold a load in place if air pressure is lost or the control valve is centered. The piston and load will drift under gravity or external force. If your machinery requires fail-safe position holding or mid-stroke locking, select the SAIL variant with an air-released lock, or the BSAI bidirectional clamp-lock cylinder. To mount this ISO 15552 unit, utilize standard accessories like TC trunnion or CA clevis brackets, and remember to order the -S magnet option if you require position feedback.
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 SAI125BX475S FAQ
At an operating pressure of 0.7 MPa, this 125 mm bore cylinder generates a push force of 8590 N and a pull force of 5734 N. It can reach a theoretical maximum force of 1251 kgf at 1.0 MPa.
Yes, for strokes of 475 mm, using an external guide rail or a fully guided cylinder carriage is strongly recommended. This prevents rod bending and bearing damage caused by side loads, ensuring the ISO 15552 mounting interface performs optimally.
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