Airtac SAI125 Standard Air Cylinder SAI125BX135
The AirTAC Airtac SAI125 Standard Air Cylinder SAI125BX135 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 135mm 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
- Stroke135 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAI125 Standard Air Cylinder SAI125BX135
The AirTAC SAI125X135 is a double-acting profile cylinder built to ISO 15552 dimensional standards, providing a robust 6136N push force at 0.5 MPa. This specific 135mm stroke is a made-to-order dimension, offering exact travel for specialized machine layouts. The extruded aluminum barrel eliminates traditional tie rods while maintaining strict mounting interchangeability.
This configuration features a SUS304 stainless steel rod (material code B) for superior corrosion resistance in harsh production environments. It utilizes PT tapered port threads and lacks a magnet, meaning it is optimized purely for pneumatic actuation without internal sensing. For operations requiring end-position locking under pressure loss, the SAIL variant is recommended.
Airtac SAI125 Standard Air Cylinder SAI125BX135 Technical Specifications
| Model | Airtac SAI125 Standard Air Cylinder SAI125BX135 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 135 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 SAI125BX135
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×135 | 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 SAI125BX135 Is Used
Heavy Stamping Press
Drives large stamping dies and heavy metal forming tooling where the 6136N push force at 0.5 MPa is required to overcome substantial material resistance.
Injection Mold Extraction
Moves heavy molded parts out of large press platens, utilizing the 125mm bore's substantial pull force of 5734N to reliably extract stuck components.
Bulk Pallet Handling
Actuates large-format pallet stops and heavy-duty diverters on automated packaging lines, ensuring positive positioning of fully loaded pallets.
Is the Airtac SAI125 Standard Air Cylinder SAI125BX135 the Right Cylinder?
Choose this 125mm bore when an 80mm cylinder (providing 2513N at 0.5 MPa) lacks the power for heavy material handling, but a 160mm bore (10053N at 0.5 MPa) would be physically oversized. Because this 135mm stroke is non-standard, verify lead times during your RFQ. The dual adjustable air cushions at both ends are tuned to decelerate the piston smoothly, but they do not hold a load mechanically.
When replacing an existing ISO 15552 cylinder, match the 125mm bore, 135mm stroke, G1/2 port size, and your required mounting accessory (such as a CA clevis or TC trunnion). Since this unit has no magnet (-S), external sensors will not function; if position feedback is needed, specify the -S option for CMSE or DMSE switches in the dual sensor grooves.
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 SAI125BX135 FAQ
At an operating pressure of 0.5 MPa, the SAI125X135 generates a push force of 6136N and a pull force of 5734N. At 0.7 MPa, the push force increases to 8590N.
No, 135mm is a non-standard stroke length for the SAI series, meaning it is manufactured as a made-to-order item. The standard catalog increments jump from 125mm to 150mm.
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