Airtac SAIJ200 Adjustable Cylinder SAIJ200AX125-40
The AirTAC Airtac SAIJ200 Adjustable Cylinder SAIJ200AX125-40 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 SAIJ200AX125-40
The AirTAC SAIJ200X125-40 is a double-acting ISO 15552 profile cylinder engineered for heavy-duty applications, featuring a robust 200 mm bore. An external rear adjusting screw allows you to shorten the effective stroke by up to 40 mm, creating a precise 85-125 mm usable travel window for fine end-position tuning without swapping out the unit.
Delivering substantial thrust, it provides 15708 N push and 15080 N pull force at 0.5 MPa, peaking at 3204 kgf at 1.0 MPa. The piston rod utilizes SUS420J2 stainless steel for high corrosion resistance, and the extruded aluminum barrel includes sensor grooves on both sides for flexible CMSE or DMSE switch mounting.
Airtac SAIJ200 Adjustable Cylinder SAIJ200AX125-40 Technical Specifications
| Model | Airtac SAIJ200 Adjustable Cylinder SAIJ200AX125-40 |
|---|---|
| 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 SAIJ200AX125-40
| 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 SAIJ200AX125-40 Is Used
Heavy Press Fine-Tuning
Dial in the 85-125 mm travel window during commissioning of large stamping or press equipment to achieve exact bottom-dead-center positioning without changing the cylinder.
Product Size Changeover
Quickly adjust the retract end-position on automated assembly lines when product dimensions change, using the 40 mm rear stopper screw to adapt the stroke on the fly.
High-Force End Stopping
Leverage the 15708 N push force at 0.5 MPa for heavy material handling, relying on the built-in stopper to set precise motion limits for large industrial loads.
Is the Airtac SAIJ200 Adjustable Cylinder SAIJ200AX125-40 the Right Cylinder?
Select this 200 mm bore cylinder when your machinery requires extreme force and exact retract positioning. If your application needs less thrust, stepping down to a 160 mm bore yields 10053 N push force at 0.5 MPa, whereas moving up is impossible as this is the largest standard size. The adjustable rear stopper is ideal for product changeovers, letting you dial in the 85-125 mm travel window on the fly instead of machining external stops.
This model uses PT tapered port threads and a G3/4 fluid port. Mounting options are limited to the SAIJ subset: Basic, FA, LB, TC, FTC, TCM1, and TCM2, deliberately omitting FB, CA, CB, and CR brackets. Because the rear adjuster acts only as a travel stop and the variable air cushions manage deceleration, neither will hold a load without live air pressure; for true load-holding, consider an external rod lock or the related SAIL or BSAI series.
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 SAIJ200AX125-40 FAQ
At 0.5 MPa operating pressure, this 200 mm bore cylinder provides 15708 N of push force and 15080 N of pull force. At its maximum rated pressure of 1.0 MPa, it can deliver up to 3204 kgf.
The rear adjusting screw acts as a mechanical stopper that lets you trim the nominal 125 mm stroke back by up to 40 mm, providing an adjustable travel window of 85 to 125 mm. It only sets the end position and does not lock the load without live air pressure.
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