Airtac SAIJ200 Adjustable Cylinder SAIJ200AX125-50
The AirTAC Airtac SAIJ200 Adjustable Cylinder SAIJ200AX125-50 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø200mm bore and 125mm stroke, G3/4 air ports and adjustable end cushioning. Its standardized mounting interface makes it a drop-in replacement for other ISO 15552 cylinders in automation lines.
- BoreØ200 mm
- Stroke125 mm
- Port sizeG3/4
- Acting typeDouble acting
- Rod threadM36×2
- CushionAdjustable, 50 mm
About the Airtac SAIJ200 Adjustable Cylinder SAIJ200AX125-50
The AirTAC SAIJ200X125-50 is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster, delivering massive thrust for heavy-duty operations. It yields 15708N of push force and 15080N of pull force at 0.5 MPa, scaling up to a maximum of 3204 kgf at 1.0 MPa. The integrated rear stopper allows you to trim the 125 mm nominal stroke back by up to 50 mm, creating a precise 75-125 mm usable travel window without swapping out the unit.
This bore size utilizes a robust 40 mm piston rod with an M36x2 thread, engineered to handle substantial side loads. It features a SUS420J2 stainless steel rod (material code A) for enhanced corrosion resistance and PT tapered port threads. As an extruded aluminum profile cylinder, it remains dimensionally interchangeable per ISO 15552 while offering a reduced mounting set of Basic, FA, LB, TC, FTC, TCM1, and TCM2.
Airtac SAIJ200 Adjustable Cylinder SAIJ200AX125-50 Technical Specifications
| Model | Airtac SAIJ200 Adjustable Cylinder SAIJ200AX125-50 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø200 mm |
| Stroke | 125 mm |
| Acting type | Double acting |
| Port size | G3/4 |
| Rod thread | M36×2 |
| 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, 50 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 (Ø200mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 15708 N | 15080 N |
| 0.7 MPa | 21991 N | — |
| Max (@1.0 MPa) | 3204 kgf | |
Actual usable force is lower than theoretical due to friction and back-pressure. Size with a safety margin.
Model Code: Airtac SAIJ200 Adjustable Cylinder SAIJ200AX125-50
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 200 | 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 SAIJ200 Adjustable Cylinder SAIJ200AX125-50 Is Used
Heavy Machinery Positioning
Provides the immense force needed to shift heavy structural components, with the 50 mm adjuster allowing precise end-position tuning during machine commissioning.
Automated Line Changeover
Enables rapid product-size transitions on high-tonnage lines by dialing the stroke back from 125 mm to 75 mm without physically replacing the cylinder.
Press and Forming Stops
Delivers up to 3204 kgf of holding thrust against a workpiece, while the rear stopper ensures the forming depth is accurately repeated.
Is the Airtac SAIJ200 Adjustable Cylinder SAIJ200AX125-50 the Right Cylinder?
Selecting this 200 mm bore is appropriate when 160 mm (yielding 10053N push at 0.5 MPa) cannot meet your force requirements. The adjustable 75-125 mm travel window is ideal for production lines running mixed product sizes, allowing operators to dial in the exact end position during changeovers rather than installing fixed stops or a standard SAI cylinder. Because the rear mechanism acts only as a travel stop and the air cushions manage deceleration, neither will hold a load safely without live air pressure; for secure load-holding, consider an external rod lock or the AirTAC SAIL locking cylinder.
For any application approaching or exceeding 300 mm of stroke, an external guide is strongly recommended to prevent rod binding, though this 125 mm unit is compact enough to manage standard loads directly. To achieve a complete ISO 15552 replacement match, verify your bore, stroke, 50 mm adjustment range, PT port thread, required mounting style, and whether you need a magnet for position sensing.
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 SAIJ200 Adjustable Cylinder SAIJ200AX125-50 FAQ
At 0.5 MPa, it provides 15708N of push force and 15080N of pull force. At its maximum operating pressure of 1.0 MPa, the push force reaches 28274N, equivalent to 3204 kgf.
The rear adjuster screw acts as a mechanical stop, allowing you to shorten the 125 mm nominal stroke by up to 50 mm. This creates a usable travel window of 75-125 mm for fine-tuning the end position without altering the cylinder mount.
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