Airtac SAIJ125 Adjustable Cylinder SAIJ125X165-75
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125X165-75 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 SAIJ125X165-75
The AirTAC SAIJ125X165-75 is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster, delivering a robust 6136N push force at 0.5 MPa. By integrating a 75mm adjustment mechanism, this model transforms your fixed 165mm stroke into a highly versatile 90-165mm usable travel window. This built-in flexibility allows operators to fine-tune end positions during commissioning or product changeovers without physically swapping the cylinder.
Featuring a sizable 32mm carbon steel rod and an M27x2 thread, this unit is built to handle substantial mechanical loads while mitigating side-load stress. The extruded aluminum barrel includes sensor grooves on both sides for straightforward position feedback. It supports a reduced mounting set of Basic, FA, LB, TC, FTC, TCM1, and TCM2, intentionally omitting FB, CA, CB, and CR brackets to streamline setup.
Airtac SAIJ125 Adjustable Cylinder SAIJ125X165-75 Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125X165-75 |
|---|---|
| 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 SAIJ125X165-75
| 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 SAIJ125X165-75 Is Used
Variable End-Stop Tuning
Dial in the retract distance from 90 to 165mm during machine setup to accommodate different material lengths without installing external physical stops.
Product Changeover
Rapidly adjust the travel window on packaging conveyors when switching between box sizes, minimizing downtime and avoiding cylinder replacement.
Heavy Assembly Pressing
Leverage the 6136N push force at 0.5 MPa to seat heavy components, using the adjuster to control the exact pressing depth.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125X165-75 the Right Cylinder?
Selecting this 125mm bore is appropriate when your application requires significant thrust, stepping up from an 80mm bore that provides 2513N at 0.5 MPa. The 75mm adjustment range is particularly valuable for packaging lines or machinery processing varying product sizes, as it allows the retract end-stop to be dialed in precisely on the fly. Because the rear screw acts solely as a travel stop and not a lock, this cylinder cannot hold loads without live air pressure; for fail-safe load holding, consider the SAIL or BSAI series. To match this ISO 15552 interchangeable cylinder, confirm your requirements for a 165mm stroke, 75mm adjuster, PT tapered port thread, and no magnet.
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 SAIJ125X165-75 FAQ
At an operating pressure of 0.5 MPa, this 125mm bore cylinder generates a push force of 6136N and a pull force of 5734N. The maximum thrust reaches 1251 kgf at 1.0 MPa.
The rear adjuster acts as an external stopper that lets you shorten the effective travel from the nominal 165mm down to 90mm. This provides a 90-165mm usable window for fine-tuning end positions at commissioning without changing the cylinder.
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