Airtac SAIJ125 Adjustable Cylinder SAIJ125AX165-30S
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125AX165-30S 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 SAIJ125AX165-30S
The AirTAC SAIJ125X165-30-S is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster, providing a usable travel window of 135 to 165 mm. It delivers 6136 N of push force at 0.5 MPa and features a SUS420J2 stainless steel rod for superior corrosion resistance. An integrated magnet enables position detection with CMSE reed or DMSE electronic sensors.
This adjustable-stroke design allows precise end-position tuning at commissioning without swapping the cylinder or adding external stops. The extruded aluminum barrel includes sensor grooves on both sides, and the mounting interface supports Basic, FA, LB, TC, FTC, TCM1, and TCM2 brackets.
Airtac SAIJ125 Adjustable Cylinder SAIJ125AX165-30S Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125AX165-30S |
|---|---|
| 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 SAIJ125AX165-30S
| 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 SAIJ125AX165-30S Is Used
Product Size Changeovers
Dial in the 135-165 mm travel window during format changes to accommodate different product lengths without physically swapping out the actuator.
Machine Setup Fine-Tuning
Use the rear stopper to precisely set the end-of-stroke position during initial commissioning, avoiding the need to bolt on custom external mechanical stops.
Heavy Material Handling
Leverage the 6136 N push force at 0.5 MPa to move heavy workpieces, relying on the SUS420J2 stainless steel rod to withstand demanding industrial environments.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX165-30S the Right Cylinder?
Choose this 125 mm bore when a 100 mm cylinder (providing 3927 N push at 0.5 MPa) lacks thrust, but a 160 mm bore is physically too large. The 30 mm adjustment window is ideal for product-size changeovers on a line. For exact ISO 15552 replacement matching, verify the 165 mm stroke, PT tapered port thread, and -S magnet requirement. Since the 165 mm stroke is under 300 mm, side-load risks are moderate, but external guides are still recommended for heavy loads.
The rear adjuster acts strictly as a travel stop and does not hold the load without live air. For load-holding without pneumatic pressure, consider an AirTAC SAIL pneumatic lock, a BSAI clamp-lock cylinder, or an external rod lock.
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 SAIJ125AX165-30S FAQ
At a 0.5 MPa operating pressure, this 125 mm bore cylinder provides 6136 N of push force and 5734 N of pull force. At 0.7 MPa, the push force increases to 8590 N.
The rear adjusting screw acts as a mechanical stop that allows you to shorten the effective stroke by up to 30 mm. This creates a usable travel window of 135 to 165 mm, enabling fine-tuning of the retracted end position without replacing the cylinder.
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