Airtac SAIJ125 Adjustable Cylinder SAIJ125X230-20S
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125X230-20S 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 SAIJ125X230-20S
The AirTAC SAIJ125X230-20-S is a double-acting, single-rod ISO 15552 profile cylinder equipped with a rear stroke adjuster. It features a 125 mm bore and a 230 mm nominal stroke that can be fine-tuned down by up to 20 mm, creating a usable travel window of 210-230 mm. This specific configuration includes a magnetic piston for position sensing and uses a PT tapered port thread.
Delivering 6136 N of push force at 0.5 MPa, it handles heavy loads while allowing precise end-position tuning at commissioning. The extruded aluminum barrel includes sensor grooves on both sides, supporting CMSE reed and DMSE electronic switches. The rear adjuster acts purely as a travel stop to set deceleration, so it will not hold the load without live air pressure.
Airtac SAIJ125 Adjustable Cylinder SAIJ125X230-20S Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125X230-20S |
|---|---|
| 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 SAIJ125X230-20S
| 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 SAIJ125X230-20S Is Used
Product Size Changeovers
Quickly dial in the 210-230 mm travel window during format changes on packaging lines without swapping out the entire actuator.
End-Position Trimming
Fine-tune the retract end-stop during machine commissioning to perfect mechanical alignment under a 6136 N load at 0.5 MPa.
Heavy Fixture Positioning
Securely move heavy jigs using the M27x2 rod thread, relying on the rear stopper to set exact resting positions safely.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125X230-20S the Right Cylinder?
Choose this adjustable-stroke cylinder when a fixed-stroke SAI cannot accommodate product changeovers or minor mechanical variations without adding external stops. If your application requires less force, stepping down to a 100 mm bore yields 3927 N at 0.5 MPa; if more thrust is needed, a 160 mm bore provides 10053 N. For load-holding without continuous air pressure, an SAIL or BSAI lock cylinder is required, as the SAIJ adjuster is not a brake.
When matching this for an ISO 15552 replacement, verify the 125 mm bore, 230 mm stroke, 20 mm adjustment range, PT port thread, and the -S magnet option. Because the stroke is 230 mm, ensure adequate external guiding to prevent excessive side loading on the 32 mm carbon steel rod. The compatible mounting set includes Basic, FA, LB, TC, FTC, TCM1, and TCM2.
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 SAIJ125X230-20S 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 0.7 MPa, the push force increases to 8590 N.
The rear adjuster screw allows you to shorten the effective stroke by up to 20 mm, providing a usable travel range of 210 to 230 mm. This stopper sets the travel end and deceleration point but does not lock the load without live air pressure.
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