Airtac SAIJ125 Adjustable Cylinder SAIJ125AX450-10
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125AX450-10 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 450mm 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
- Stroke450 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX450-10
The AirTAC SAIJ125X450-10 is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster, delivering 6136N of push force at 0.5 MPa. Its 450mm nominal stroke can be dialed back by up to 10mm, creating a precise 440-450mm usable travel window for exact end-position tuning. The extruded aluminum barrel features sensor grooves on both sides, and this specific configuration uses a SUS420J2 stainless steel rod (material code A) for superior corrosion resistance.
This model operates at 30-500mm/s and uses PT tapered port threads (G1/2). The rear adjustment mechanism acts strictly as a mechanical stop to fine-tune deceleration and travel limits during commissioning. It is not a locking device, meaning it cannot hold a load without live air pressure. For position-holding requirements, consider an external pilot-operated check valve or the AirTAC SAIL series.
Airtac SAIJ125 Adjustable Cylinder SAIJ125AX450-10 Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125AX450-10 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 450 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 SAIJ125AX450-10
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×450 | 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 SAIJ125AX450-10 Is Used
Product Size Changeovers
Dial in the 440-450mm travel window during format changes on packaging lines, using the rear stopper to instantly match new carton dimensions without changing the cylinder.
Machine Setup Fine-Tuning
Achieve exact end-position calibration at commissioning by trimming the stroke up to 10mm, avoiding the need to add external shims or spacers to the fixture.
Heavy Forming End-Stop
Leverage the 6136N thrust capacity for heavy pressing or forming tasks, using the adjustable stop to precisely set the lower dead center for the operation.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX450-10 the Right Cylinder?
Selecting this 125mm bore cylinder makes sense when your application requires the 6136N push force (at 0.5 MPa) and on-the-fly end-position tweaking without swapping physical components. If your load demands less force, stepping down to an 80mm bore provides 2513N of push force, whereas moving up to a 160mm bore yields 10053N. The adjustable 440-450mm window is perfect for accommodating minor product size variations on a production line.
Because this cylinder features a 450mm stroke, the 32mm diameter SUS420J2 rod will experience leverage forces during extension; an external guide is recommended to prevent excessive side-loading. When replacing an ISO 15552 cylinder, match the 125mm bore, 450mm stroke, 10mm adjustment, PT port thread, and mounting style. SAIJ supports Basic, FA, LB, TC, FTC, TCM1, and TCM2 mounts, deliberately omitting FB, CA, CB, and CR options. Note that this unit lacks a magnet, so it requires external sensors or a model specified with -S to utilize CMSE reed or DMSE electronic switches.
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 SAIJ125AX450-10 FAQ
At 0.5 MPa operating pressure, this 125mm bore cylinder provides 6136N of push force and 5734N of pull force. At its maximum 1.0 MPa pressure, it can deliver up to 1251 kgf.
The rear adjuster acts as a mechanical stop that allows you to shorten the 450mm nominal stroke by up to 10mm, providing a usable travel window of 440-450mm. It only sets the travel end and does not lock or hold the load without continuous air pressure.
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