Airtac SAIJ125 Adjustable Cylinder SAIJ125X230-50
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125X230-50 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 230mm 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
- Stroke230 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125X230-50
The AirTAC SAIJ125X230-50 is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster, delivering 6136N of push force at 0.5 MPa. Its 125mm bore utilizes a G1/2 port and a 32mm carbon steel rod with an M27x2 thread, providing a robust interface for heavy-duty automation. The integrated rear stopper allows you to fine-tune the effective travel window down from a 230mm nominal stroke to anywhere between 180mm and 230mm.
This on-machine adjustability is ideal for product changeovers, letting you dial in the exact retract position without swapping hardware or adding external stops. The extruded aluminum barrel features sensor grooves on both sides for flexible mounting of CMSE or DMSE switches, though this specific SKU is configured without a magnet. Keep in mind the rear adjuster acts purely as a travel stop to set the end position; it does not lock the load or hold position without continuous live air pressure.
Airtac SAIJ125 Adjustable Cylinder SAIJ125X230-50 Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125X230-50 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 230 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 SAIJ125X230-50
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×230 | 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 SAIJ125X230-50 Is Used
Product Changeovers
Quickly dial in the retract stroke from 180 to 230mm during format changes on packaging lines without swapping out the entire cylinder.
Heavy Forming Stops
Leverage the 6136N push force at 0.5 MPa to press or form components, using the rear stopper to set precise material engagement depth.
Machine Setup Calibration
Fine-tune end-of-stroke positions during initial commissioning to perfect machine timing, avoiding the need for machined external spacers.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125X230-50 the Right Cylinder?
Selecting this 125mm bore cylinder makes sense when your application requires substantial force—such as the 6136N push or 5734N pull available at 0.5 MPa—but still demands precise mechanical end-position tuning within a 180-230mm travel window. If your setup needs less force and a faster cycle, stepping down to an 80mm bore yields 2513N of push force at 0.5 MPa. Conversely, heavier payloads might require the 160mm bore, which provides 10053N at 0.5 MPa. Because the 230mm stroke exceeds 300mm? No, but for any stroke of 300mm or more, you must account for side-load by adding an external guide to protect the piston rod.
When matching this cylinder for an ISO 15552 replacement, verify the 125mm bore, 230mm stroke, 50mm adjustment range, PT tapered port thread, and your required mounting accessory from the SAIJ subset (Basic, FA, LB, TC, FTC, TCM1, TCM2). Note that FB, CA, CB, and CR mounts are omitted from this adjustable series. For applications requiring true load-holding without live air, a plain SAIJ is insufficient; consider an AirTAC SAIL (pneumatic lock) or BSAI (clamp-lock) cylinder instead.
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 SAIJ125X230-50 FAQ
At 0.5 MPa operating pressure, this 125mm bore cylinder provides 6136N of push force and 5734N of pull force. If operated at 0.7 MPa, the push force increases to 8590N.
The rear adjuster acts as a mechanical stop, allowing you to shorten the 230mm nominal stroke by up to 50mm. This creates a usable travel window of 180-230mm for fine-tuning the retract end position during setup or product changeovers.
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