Airtac SAIJ100 Adjustable Cylinder SAIJ100AX125-100
The AirTAC Airtac SAIJ100 Adjustable Cylinder SAIJ100AX125-100 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø100mm bore and 125mm 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.
- BoreØ100 mm
- Stroke125 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM20×1.5
- CushionAdjustable, 36 mm
About the Airtac SAIJ100 Adjustable Cylinder SAIJ100AX125-100
The AirTAC SAIJ100X125-100 is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster that allows you to fine-tune the effective travel. With a 125 mm nominal stroke and a 100 mm adjustment range, you can dial in the retraction end-position anywhere within a 25-125 mm usable travel window. It delivers 3927 N of push force at 0.5 MPa and 7068 N at 0.9 MPa, making it well-suited for heavy-duty positioning tasks.
This specific SKU is configured with a SUS420J2 stainless steel rod for superior corrosion resistance and uses PT tapered port threads. The extruded aluminum barrel includes sensor grooves on both sides for flexible mounting of CMSE or DMSE switches. Remember that the rear adjuster functions purely as a mechanical stop to set the travel limit; it does not lock or hold the load without continuous live air pressure.
Airtac SAIJ100 Adjustable Cylinder SAIJ100AX125-100 Technical Specifications
| Model | Airtac SAIJ100 Adjustable Cylinder SAIJ100AX125-100 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø100 mm |
| Stroke | 125 mm |
| Acting type | Double acting |
| Port size | G1/2 |
| Rod thread | M20×1.5 |
| 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 – 800 mm/s |
| Cushion | Adjustable, 36 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 (Ø100mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 3927 N | 3682 N |
| 0.7 MPa | 5498 N | — |
| Max (@1.0 MPa) | 801 kgf | |
Actual usable force is lower than theoretical due to friction and back-pressure. Size with a safety margin.
Model Code: Airtac SAIJ100 Adjustable Cylinder SAIJ100AX125-100
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 100 | Bore size in mm. |
| ×125 | 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 SAIJ100 Adjustable Cylinder SAIJ100AX125-100 Is Used
Product Changeovers
Quickly reconfigure the stroke window from 25 to 125 mm on packaging lines when switching to a different product size without swapping the entire cylinder.
Commissioning Calibration
Fine-tune the exact retraction end-position during machine setup to ensure precise alignment of heavy 100 mm bore tooling components.
Variable End Stops
Adjust the mechanical stop on the fly to accommodate varying material thicknesses or positions in heavy-duty automated assembly equipment.
Is the Airtac SAIJ100 Adjustable Cylinder SAIJ100AX125-100 the Right Cylinder?
Selecting this 100 mm bore cylinder provides a substantial step up in force over the 80 mm bore variant, which offers 2513 N of push force at 0.5 MPa. The 100 mm bore is the right choice when your application demands high thrust but you need the flexibility to adjust the end-stop during commissioning or product size changeovers, rather than relying on a fixed-stroke SAI cylinder. Because the stroke is 125 mm, which is less than 300 mm, external guide support is not strictly mandated for side-load stability, though the robust 25 mm rod and M20x1.5 thread naturally handle moderate side loads well.
When replacing an ISO 15552 cylinder, match these exact attributes: 100 mm bore, 125 mm stroke, 100 mm adjustment range, PT port threads, and no magnet. Note that SAIJ supports a reduced mounting set of Basic, FA, LB, TC, FTC, TCM1, and TCM2, omitting the FB, CA, CB, and CR mounts. If your process requires the load to be held mechanically without live air, consider the SAIL or BSAI series instead, as the SAIJ adjuster is not a locking device.
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 SAIJ100 Adjustable Cylinder SAIJ100AX125-100 FAQ
At a 0.5 MPa operating pressure, this 100 mm bore cylinder provides 3927 N of push force and 3681 N of pull force. At the maximum recommended pressure of 0.9 MPa, the push force increases to 7068 N.
The rear adjuster screw acts as a mechanical stop, allowing you to trim the 125 mm nominal stroke back by up to 100 mm. This creates a usable travel window of 25 to 125 mm, enabling precise end-position tuning without replacing the cylinder.
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