Airtac SAIJ125 Adjustable Cylinder SAIJ125AX180-75S
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125AX180-75S 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 SAIJ125AX180-75S
The AirTAC SAIJ125X180-75-S is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster, providing a usable travel window of 105 to 180 mm. It delivers 6136 N of push force and 5734 N of pull force at 0.5 MPa, making it suited for heavy-duty positioning tasks. The extruded aluminum barrel features sensor grooves on both sides, and this -S variant includes a magnet for direct compatibility with AirTAC CMSE reed and DMSE electronic solid-state switches.
This model features a SUS420J2 stainless steel rod (code A) and PT tapered port threads. The rear adjuster acts purely as a mechanical stop to fine-tune the retract end position during commissioning or product changeovers. It does not lock the load without live air pressure, so load-holding applications require an external pilot-operated check valve or a related SAIL pneumatic lock cylinder.
Airtac SAIJ125 Adjustable Cylinder SAIJ125AX180-75S Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125AX180-75S |
|---|---|
| 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 SAIJ125AX180-75S
| 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 SAIJ125AX180-75S Is Used
Multi-Size Machining Fixtures
Dial in the retract stop across a 105-180 mm window to accommodate different raw material lengths on the same fixture without mechanical rebuilds.
Automated Press Tuning
Fine-tune the end-of-stroke position during commissioning to precisely set the pressing depth, preventing damage to components using the 6136 N thrust.
Variable Product Diverting
Adjust the diverting arm reach on the fly for different package widths, utilizing the rear stopper to set exact travel limits for each product run.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX180-75S the Right Cylinder?
Select this 125 mm bore cylinder when an application demands high thrust combined with variable end-stop positioning, stepping up from a 100 mm bore that provides 3927 N push force at 0.5 MPa. The generous 75 mm adjustment window is ideal for machinery processing multiple product sizes, allowing rapid changeover without swapping the cylinder or adding external stops. For load-holding without continuous air supply, specify a SAIL or BSAI series cylinder instead of relying on the SAIJ adjuster.
When replacing an ISO 15552 cylinder, verify the 125 mm bore, 180 mm nominal stroke, 75 mm adjustment range, PT port threads, and the required -S magnet. The SAIJ supports a reduced mounting set including Basic, FA, LB, TC, FTC, TCM1, and TCM2, omitting FB, CA, CB, and CR options. Operating speed for this bore is 30-500 mm/s.
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 SAIJ125AX180-75S FAQ
At 0.5 MPa operating pressure, this 125 mm bore cylinder provides 6136 N of push force and 5734 N of pull force. At the maximum 1.0 MPa pressure, it achieves up to 1251 kgf.
The rear mechanical screw allows you to shorten the effective stroke by up to 75 mm from the 180 mm nominal length, creating a usable travel window of 105 to 180 mm. This stopper sets the end position but does not lock the load without live air pressure.
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