Airtac SAIJ125 Adjustable Cylinder SAIJ125AX230-20
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125AX230-20 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 SAIJ125AX230-20
The AirTAC SAIJ125X230-20 is a double-acting ISO 15552 profile cylinder featuring a rear-mounted stroke adjuster. It provides a usable travel window of 210 to 230 mm, allowing you to dial back the nominal 230 mm stroke by up to 20 mm during commissioning without adding external stops. It delivers a robust 6136 N push force at 0.5 MPa, scaling up to 11045 N at 0.9 MPa.
This variant uses a SUS420J2 stainless steel rod (material code A) for enhanced corrosion resistance and features PT tapered port threads. The rear adjuster acts purely as a travel stop and does not hold the load without live air pressure. It supports a speed range of 30-500 mm/s and includes sensor grooves on both sides of the extruded aluminum barrel for flexible switch placement.
Airtac SAIJ125 Adjustable Cylinder SAIJ125AX230-20 Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125AX230-20 |
|---|---|
| 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 SAIJ125AX230-20
| 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 SAIJ125AX230-20 Is Used
Machine Changeover
Dial in the 210-230 mm travel window during product size transitions without physically replacing the cylinder or reworking fixed stops.
End-Position Tuning
Fine-tune the exact retract stop during commissioning to perfect process timing, using the rear adjuster to absorb mechanical variance.
Heavy Forming Press
Leverage the 11045 N output at 0.9 MPa for high-force pressing operations, using the adjuster to set precise bottoming depth.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX230-20 the Right Cylinder?
Choose this 125 mm bore when an 80 mm cylinder (providing 2513 N push at 0.5 MPa) is insufficient, but a 160 mm bore is oversized. The adjustable 210-230 mm window is perfect for product changeovers or fine-tuning end positions on the fly, avoiding the need to swap out a fixed-stroke SAI cylinder.
When ordering, specify the bore, 230 mm stroke, 20 mm adjustment, PT port thread, and the SUS420J2 rod material (code A). Note that the SAIJ mounting set includes Basic, FA, LB, TC, FTC, TCM1, and TCM2 options, omitting FB, CA, CB, and CR. Because the stroke is over 300 mm, ensure an external guide supports the load to prevent excessive side-loading on the rod.
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 SAIJ125AX230-20 FAQ
At 0.5 MPa it provides 6136 N of push force and 5734 N of pull force. At 0.9 MPa, the push force increases to 11045 N.
The rear adjuster screw lets you shorten the effective travel from the 230 mm nominal stroke down to 210 mm. It acts as a mechanical stop and does not lock or hold the load without live air pressure.
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