Airtac SAIJ125 Adjustable Cylinder SAIJ125AX165-20
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125AX165-20 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 SAIJ125AX165-20
The AirTAC SAIJ125X165-20 is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster. It provides a 145-165mm usable travel window, allowing you to dial back the 165mm nominal stroke by up to 20mm during machine commissioning. Delivering 6136N push force at 0.5MPa, it handles heavy loads with precision.
This model uses a SUS420J2 stainless steel rod for enhanced corrosion resistance. The extruded aluminum barrel includes sensor grooves on both sides, though this non-magnet version does not support position sensing. You can fine-tune the retract end-position without swapping hardware or bolting on external stops.
Airtac SAIJ125 Adjustable Cylinder SAIJ125AX165-20 Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125AX165-20 |
|---|---|
| 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 SAIJ125AX165-20
| 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 SAIJ125AX165-20 Is Used
Product Changeover
Dial in the 145-165mm travel window to accommodate different product sizes on the same line without physically swapping the cylinder.
End-Stop Tuning
Fine-tune the retract end-position during machine commissioning using the rear adjuster screw, avoiding the need for external mechanical stops.
Heavy Forming
Leverage the 6136N push force at 0.5MPa for heavy-duty press operations, utilizing the M27x2 rod thread for robust tooling attachment.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX165-20 the Right Cylinder?
Select this 125mm bore cylinder when your application requires 6136N thrust at 0.5MPa. If you need less force, stepping down to the 100mm bore yields 3927N, while the larger 160mm bore offers 10053N. The adjustable stroke is ideal for product changeovers requiring variable end-stops.
This SKU features a PT tapered G1/2 port and omits the -S magnet, meaning AirTAC CMSE reed or DMSE electronic sensors cannot be used. The rear adjuster acts purely as a travel stop and does not hold the load without live air; for true lock-holding, consider the SAIL or BSAI series. Mounting options include Basic, FA, LB, TC, FTC, TCM1, and TCM2.
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 SAIJ125AX165-20 FAQ
At 0.5MPa operating pressure, it provides 6136N of push force and 5734N of pull force. At the maximum 1.0MPa pressure, the push force increases to 1251kgf.
The rear adjuster screw lets you shorten the 165mm nominal stroke by up to 20mm, creating a 145-165mm travel window. The adjuster functions as a mechanical stop to decelerate the load, not as a lock to hold it without live air.
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