Airtac SAIJ200 Adjustable Cylinder SAIJ200AX125-75S
The AirTAC Airtac SAIJ200 Adjustable Cylinder SAIJ200AX125-75S 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 SAIJ200AX125-75S
The AirTAC SAIJ200X125-75-S is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster that permits a usable travel window of 50-125 mm from a 125 mm nominal stroke. It delivers a robust 15708 N push force at 0.5 MPa and 21991 N at 0.7 MPa, making it ideal for heavy-duty positioning. The extruded aluminum barrel includes sensor grooves on both sides, and this -S variant includes a magnet for CMSE reed and DMSE electronic solid-state switches.
This SKU is configured with a SUS420J2 stainless steel rod (code A) for enhanced corrosion resistance and uses PT tapered port threads. The rear adjustment screw allows fine end-position tuning at commissioning without swapping the cylinder or adding external stops. Note that the adjuster acts only as a travel stop and does not hold the load without live air pressure.
Airtac SAIJ200 Adjustable Cylinder SAIJ200AX125-75S Technical Specifications
| Model | Airtac SAIJ200 Adjustable Cylinder SAIJ200AX125-75S |
|---|---|
| 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 SAIJ200AX125-75S
| 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 SAIJ200AX125-75S Is Used
Heavy-Duty Press Tuning
Dial in the exact 50-125 mm pressing distance during machine setup or product changeover without physically swapping the actuator.
Variable End-Stop Forming
Adjust the rear stopper to accommodate different material thicknesses on a single line, using the 21991 N force at 0.7 MPa for forming operations.
Sensor-Ready Positioning
Leverage the dual-side sensor grooves and built-in magnet for precise CMSE or DMSE switch placement alongside the adjustable stroke.
Is the Airtac SAIJ200 Adjustable Cylinder SAIJ200AX125-75S the Right Cylinder?
Select this 200 mm bore cylinder when an application requires high thrust (up to 3204 kgf at 1.0 MPa) alongside variable end-stop positioning. If the 50-125 mm adjustable travel window is too large, stepping down to a 160 mm bore provides 10053 N push at 0.5 MPa with a shorter adjustment mechanism. The SAIJ mounting set includes Basic, FA, LB, TC, FTC, TCM1, and TCM2, omitting FB, CA, CB, and CR options.
For load-holding without live air pressure, this cylinder is insufficient because the rear adjuster and air cushions only decelerate the travel end. You must use an external rod lock, a pilot-operated check valve, or switch to an AirTAC SAIL (air-released lock) or BSAI (clamp-lock) cylinder. To replace an ISO 15552 unit, match the 200 mm bore, 125 mm stroke, 75 mm adjustment, PT G3/4 port, and -S magnet.
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 SAIJ200AX125-75S FAQ
The rear adjusting screw acts as an external stopper, allowing you to shorten the effective stroke by up to 75 mm. This creates a usable travel window of 50-125 mm, enabling fine end-position tuning at commissioning without changing the cylinder.
At a 0.5 MPa operating pressure, it provides 15708 N of push force and 15080 N of pull force. At 0.7 MPa, the push force increases to 21991 N, with a maximum push force of 28274 N at 0.9 MPa.
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