Airtac SAIJ125 Adjustable Cylinder SAIJ125AX180-30S
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125AX180-30S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 180mm 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
- Stroke180 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX180-30S
The AirTAC SAIJ125X180-30-S is a double-acting, single-rod ISO 15552 profile cylinder featuring a rear-mounted stroke adjuster. It provides a 6136N push force at 0.5 MPa and delivers a usable travel window of 150-180 mm, letting you dial back the nominal 180 mm stroke by up to 30 mm during commissioning. This version includes a -S magnet for position sensing and uses a SUS420J2 stainless steel rod (code A) for enhanced corrosion resistance.
Instead of adding external stops, the integrated rear screw lets you fine-tune the retract end position on the fly. The extruded aluminum barrel incorporates sensor grooves on both sides, supporting AirTAC CMSE reed and DMSE solid-state switches. SAIJ uses a reduced mounting set (Basic, FA, LB, TC, FTC, TCM1, TCM2) and omits FB, CA, CB, and CR brackets. The rear adjuster acts only as a travel stop to set deceleration; it does not hold the load without live air pressure.
Airtac SAIJ125 Adjustable Cylinder SAIJ125AX180-30S Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125AX180-30S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 180 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 SAIJ125AX180-30S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×180 | 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 SAIJ125AX180-30S Is Used
Product Changeover Tuning
Dial in the exact 150-180 mm end position for varying package sizes on a packaging line without replacing hardware or adding external mechanical stops.
Heavy Fixture Positioning
Move heavy machining fixtures using 6136N of thrust at 0.5 MPa while relying on the rear screw to fine-tune the clamping distance during machine setup.
Press End-Stop Calibration
Set precise lower-end travel limits on a pneumatic press, adjusting the 30 mm window to compensate for tooling wear without recalibrating the entire motion axis.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX180-30S the Right Cylinder?
Choose this 125 mm bore when an 80 mm cylinder (delivering 2513N push at 0.5 MPa) cannot meet your thrust requirements, but a 160 mm bore (10053N) would be excessive overkill. The adjustable 150-180 mm window is ideal for product-size changeovers on a line, allowing you to reposition the end-stop without physically swapping the cylinder. For load-holding without continuous air pressure, this plain cylinder is insufficient—you must look to the SAIL (air-released lock) or BSAI (clamp-lock) series instead. To match this ISO 15552 replacement exactly, verify the 180 mm stroke, 30 mm adjustment, PT tapered ports, and the -S magnet requirement.
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 SAIJ125AX180-30S FAQ
At 0.5 MPa it provides 6136N of push force and 5734N of pull force. If higher pressure is utilized, the push force increases to 8590N at 0.7 MPa and 11045N at 0.9 MPa.
The rear adjusting screw acts as a stopper that shortens the effective travel from the nominal 180 mm down to as little as 150 mm. It sets the end position and deceleration point but does not lock or hold the load without live air pressure.
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