Airtac SAIJ125 Adjustable Cylinder SAIJ125AX155-10
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125AX155-10 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 155mm 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
- Stroke155 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX155-10
The AirTAC SAIJ125X155-10 is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster, enabling a usable travel window of 145 to 155 mm. Delivering a 0.5 MPa push thrust of 6136 N and pull force of 5734 N, it handles heavy-duty positioning tasks. The extruded aluminum barrel features sensor grooves on both sides for flexible detection mounting.
This specific SKU features a SUS420J2 stainless steel rod (material code A) for enhanced corrosion resistance and utilizes PT tapered port threads. The external rear stopper screw allows you to fine-tune the retract end position by up to 10 mm during commissioning without adding external stops. The adjuster acts purely as a travel stop and does not hold the load without live air pressure.
Airtac SAIJ125 Adjustable Cylinder SAIJ125AX155-10 Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125AX155-10 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 155 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 SAIJ125AX155-10
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×155 | 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 SAIJ125AX155-10 Is Used
Machining Fixtures
Dial in the exact 145-155 mm clamping position during machine setup to accommodate varying raw material lengths without swapping out the entire cylinder body.
Assembly Line Changeover
Quickly adjust the retract end-stop by up to 10 mm when switching the production line to a new product size, ensuring precise component seating.
Heavy Material Handling
Leverage the 6136 N push force to move heavy workpieces while relying on the rear adjuster to fine-tune the final resting position for the next process step.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX155-10 the Right Cylinder?
Select this 125 mm bore cylinder when an application requires substantial force combined with precise end-position tuning at machine setup. If your process demands less thrust, stepping down to an 80 mm bore yields a 2513 N push force at 0.5 MPa; if more power is needed, moving up to a 160 mm bore provides 10053 N. The adjustable 10 mm window is ideal for product changeovers where exact end-of-stroke positioning varies slightly.
Because the 155 mm stroke is under the 300 mm threshold, side-load risks are moderate, but the 32 mm rod and M27x2 thread provide excellent rigidity. For load-holding without continuous air pressure, this standard SAIJ is insufficient; consider an AirTAC SAIL (pneumatic lock) or BSAI (clamp-lock) cylinder instead. To match this ISO 15552 interchangeable unit, verify the 125 mm bore, 155 mm stroke, 10 mm adjustment, PT G1/2 port, and SUS420J2 rod material.
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 SAIJ125AX155-10 FAQ
At a standard operating pressure of 0.5 MPa, 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 external stopper screw allows you to shorten the nominal 155 mm stroke by up to 10 mm, creating a usable travel window of 145 to 155 mm. This mechanism acts as a travel stop to decelerate the piston and cannot hold a load without continuous air pressure.
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