Airtac SAIJ125 Adjustable Cylinder SAIJ125AX100-75
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125AX100-75 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 100mm 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
- Stroke100 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX100-75
The AirTAC SAIJ125X100-75 is a double-acting ISO 15552 profile cylinder equipped with a rear mechanical adjuster. It delivers a robust 6136 Newtons of push force at 0.5 MPa, using a 32 mm SUS420J2 stainless steel rod with an M27x2 thread. The built-in stopper lets you dial back the nominal 100 mm stroke by up to 75 mm, creating a wide 25-100 mm usable travel window for precise positioning at commissioning.
This adjustable design eliminates the need to swap physical cylinders or bolt on external stops during product changeovers. The extruded aluminum barrel features sensor grooves on both sides, and while this specific SKU lacks a magnet, the mounting footprint remains dimensionally interchangeable with ISO 15552 standards. It carries a reduced mounting set of Basic, FA, LB, TC, FTC, TCM1, and TCM2, omitting FB, CA, CB, and CR options.
Airtac SAIJ125 Adjustable Cylinder SAIJ125AX100-75 Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125AX100-75 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 100 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 SAIJ125AX100-75
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×100 | 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 SAIJ125AX100-75 Is Used
Product Changeover
Quickly reconfigure the retract end-stop for different package lengths on a packaging line without replacing the cylinder.
End-Position Tuning
Fine-tune the final retract position during machine commissioning to dial in exact mechanical clearances.
Variable Forming Stops
Adjust the stroke window on the fly for heavy-duty forming or pressing tasks that require varying material depths.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX100-75 the Right Cylinder?
Choose this 125 mm bore when an application requires heavy thrust—yielding 6136 N push at 0.5 MPa—and a highly variable end position. If your force needs are lower, stepping down to a 100 mm bore provides 3927 N push force while saving space. The 75 mm adjustment range is ideal for machines handling multiple product sizes, allowing you to fine-tune the retract stop without hardware changes. Ports use a PT tapered thread type.
When specifying a replacement, match the 125 mm bore, 100 mm nominal stroke, 75 mm adjuster, PT port, and SUS420J2 rod material. Remember the rear adjuster acts purely as a travel stop and cannot hold a load without live air; for true position holding, select an AirTAC SAIL or BSAI cylinder. The 32 mm rod and M27x2 thread handle high side loads well, but any stroke over 300 mm requires an external guide.
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 SAIJ125AX100-75 FAQ
At 0.5 MPa operating pressure, this 125 mm bore cylinder provides 6136 Newtons of push force and 5734 Newtons of pull force. At 0.9 MPa, the push force increases to 11045 Newtons.
The rear adjuster acts as a mechanical stop that lets you shorten the 100 mm nominal stroke by up to 75 mm. This creates a usable travel window of 25 to 100 mm, allowing precise end-position tuning without swapping cylinders.
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