Airtac SAIJ125 Adjustable Cylinder SAIJ125AX165-40S
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125AX165-40S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 165mm 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
- Stroke165 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX165-40S
The AirTAC SAIJ125X165-40-S is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster, providing a usable travel window of 125 to 165 mm. It delivers 6136 N of push force and 5734 N of pull force at 0.5 MPa, making it suitable for heavy-duty positioning tasks. The extruded aluminum barrel features sensor grooves on both sides, and the included magnet (-S) supports precise end-of-stroke detection via AirTAC CMSE reed or DMSE electronic solid-state switches.
This model features a SUS420J2 stainless steel rod (option A) for enhanced corrosion resistance and uses PT tapered port threads (G1/2). The rear adjuster acts strictly as a mechanical stop to fine-tune the retract position during commissioning; it does not lock the load without live air pressure. For load-holding requirements without continuous air, an external rod lock or related types like SAIL or BSAI should be utilized.
Airtac SAIJ125 Adjustable Cylinder SAIJ125AX165-40S Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125AX165-40S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 165 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 SAIJ125 Adjustable Cylinder SAIJ125AX165-40S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×165 | 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 SAIJ125 Adjustable Cylinder SAIJ125AX165-40S Is Used
Product Size Changeovers
Dial in the exact 125 to 165 mm end-stop during production line changeovers to accommodate varying material lengths without replacing the actuator.
Heavy-Duty Positioning
Leverage the 6136 N push force at 0.5 MPa to move heavy pallets or chassis components into a precise machining station.
Commissioning Fine-Tuning
Use the 40 mm rear mechanical stop to safely trim the retract position during initial machine setup, preventing costly collisions.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX165-40S the Right Cylinder?
Select this 125 mm bore cylinder when an application requires substantial force—stepping down to a 100 mm bore yields 3927 N push force at 0.5 MPa, while stepping up to 160 mm provides 10053 N. The adjustable 125 to 165 mm travel window is ideal for machines processing multiple product sizes, allowing operators to dial in the exact end-stop without swapping cylinders or adding external stops. Unlike a fixed-stroke SAI cylinder, this model enables rapid product changeovers.
To match this ISO 15552 dimensionally interchangeable cylinder, confirm the 125 mm bore, 165 mm nominal stroke, 40 mm adjustment range, PT G1/2 port, and the -S magnet. The available mounting set includes Basic, FA, LB, TC, FTC, TCM1, and TCM2. Because the 32 mm rod and M27x2 thread provide robust side-load capacity, this cylinder handles high axial stresses, though any stroke over 300 mm would still require an external guide.
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 SAIJ125 Adjustable Cylinder SAIJ125AX165-40S FAQ
At 0.5 MPa operating pressure, this 125 mm bore cylinder provides a push force of 6136 N and a pull force of 5734 N. At 0.7 MPa, the push force increases to 8590 N.
The rear adjuster acts as a mechanical stop that allows you to shorten the effective stroke by up to 40 mm, creating a usable travel window of 125 to 165 mm. It only sets the end position and does not hold the load without live air pressure.
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