Airtac SAIJ125 Adjustable Cylinder SAIJ125AX170-50
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125AX170-50 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 170mm 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
- Stroke170 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX170-50
The AirTAC SAIJ125X170-50 is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster. It provides a usable travel window of 120-170 mm, allowing you to dial back the 170 mm nominal stroke by up to 50 mm. In the 125 mm bore class, it generates 6136 N of push force and 5734 N of pull force at 0.5 MPa.
This unit features a SUS420J2 stainless steel rod for enhanced corrosion resistance and uses PT tapered port threads. The rear adjuster acts purely as a mechanical stop to fine-tune end positions at commissioning; it does not hold the load without live air. For load-holding requirements, consider the SAIL or BSAI series.
Airtac SAIJ125 Adjustable Cylinder SAIJ125AX170-50 Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125AX170-50 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 170 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 SAIJ125AX170-50
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×170 | 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 SAIJ125AX170-50 Is Used
Product Changeover
Dial in the 120-170 mm travel window during line changeovers to accommodate different product sizes without replacing hardware.
End-Position Tuning
Fine-tune the retract end-stop during machine commissioning to perfect pressing or clamping depths on the fly.
Assembly Pressing
Leverage the 6136 N push force at 0.5 MPa for heavy-duty assembly operations while maintaining flexible stroke limits.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX170-50 the Right Cylinder?
Choose this adjustable model over a fixed SAI cylinder when your setup requires variable end-stops or frequent product changeovers, as it eliminates the need to swap physical cylinders or add external stops. If your application requires less force, stepping down to a 100 mm bore yields 3927 N of push force at 0.5 MPa.
Because the 170 mm stroke is below the 300 mm threshold, external side-load guides are less critical here, though the robust 32 mm rod and M27x2 thread handle substantial stresses. The mounting options include Basic, FA, LB, TC, FTC, TCM1, and TCM2. Since no magnet is specified, position sensing via CMSE or DMSE switches is not supported without modification. For true drop-in ISO 15552 interchangeability, match the 125 mm bore, 170 mm stroke, 50 mm adjustment, PT ports, and mounting style.
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 SAIJ125AX170-50 FAQ
At 0.5 MPa operating pressure, this 125 mm bore cylinder provides 6136 N of push force and 5734 N of pull force. It can reach up to 11045 N push force at 0.9 MPa.
The rear mechanical stopper allows you to shorten the 170 mm nominal stroke by up to 50 mm, creating a usable travel window of 120-170 mm. This adjuster sets the travel end and is not a lock, meaning the cylinder requires live air to hold its position.
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