Airtac SAIJ200 Adjustable Cylinder SAIJ200AX85-50S
The AirTAC Airtac SAIJ200 Adjustable Cylinder SAIJ200AX85-50S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø200mm bore and 85mm 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
- Stroke85 mm
- Port sizeG3/4
- Acting typeDouble acting
- Rod threadM36×2
- CushionAdjustable, 50 mm
About the Airtac SAIJ200 Adjustable Cylinder SAIJ200AX85-50S
The AirTAC SAIJ200X85-50-S is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster, allowing you to dial back the nominal 85 mm travel by up to 50 mm. This yields a highly flexible usable travel window of 35 to 85 mm, letting you fine-tune the retract end position at commissioning without swapping out the cylinder or adding external stops. It delivers massive thrust, pushing 15708 N and pulling 15080 N at 0.5 MPa.
Built for durability, this variant features a SUS420J2 stainless steel rod (code A) for superior corrosion resistance and includes a magnet (-S) for use with AirTAC CMSE reed and DMSE electronic sensors. The extruded aluminum barrel maintains standard ISO 15552 mounting dimensions, and fluid is filtered air operating at 0.15 to 1.0 MPa. The rear screw acts purely as a travel stop to set the end position, not as a lock, so live air is required to hold the load.
Airtac SAIJ200 Adjustable Cylinder SAIJ200AX85-50S Technical Specifications
| Model | Airtac SAIJ200 Adjustable Cylinder SAIJ200AX85-50S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø200 mm |
| Stroke | 85 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 SAIJ200AX85-50S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 200 | Bore size in mm. |
| ×85 | 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 SAIJ200AX85-50S Is Used
Variable End-Stop Positioning
Dial in the exact retract distance between 35 and 85 mm during machine commissioning to accommodate different material thicknesses without external stopper hardware.
Heavy Product Changeover
Leverage the 15708 N push force at 0.5 MPa to press or move heavy assemblies, quickly adjusting the 50 mm travel window when switching production lines to new product sizes.
Sensor-Driven Actuation
Utilize the integrated magnet with DMSE electronic or CMSE reed switches mounted in the dual sensor grooves to confirm end-of-stroke positions accurately in automated setups.
Is the Airtac SAIJ200 Adjustable Cylinder SAIJ200AX85-50S the Right Cylinder?
Selecting this 200 mm bore cylinder is ideal when an application requires the maximum force class—up to 3204 kgf at 1.0 MPa—and on-the-fly end-position tuning. If you need less force, stepping down to a 160 mm bore provides 10053 N push force at 0.5 MPa. Choose the SAIJ adjustable-stroke design over a fixed SAI when your setup involves product-size changeovers or requires precise variable end-stops. To match this exact replacement, specify: 200 mm bore, 85 mm stroke, 50 mm adjustment, PT tapered ports, SUS420J2 rod, and the -S magnet.
Because the nominal stroke is 85 mm, it falls well under the 1500 mm maximum standard stroke, keeping the internal mechanics compact. The robust 40 mm rod and M36x2 thread handle significant side loads, though any long unsupported stroke over 300 mm would necessitate an external guide. For load-holding without continuous air pressure, integrate an external rod lock or look to the SAIL or BSAI series instead of relying on the adjuster. Mounting options include Basic, FA, LB, TC, FTC, TCM1, and TCM2.
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 SAIJ200AX85-50S FAQ
At 0.5 MPa operating pressure, this 200 mm bore cylinder provides a push force of 15708 N and a pull force of 15080 N. At its maximum rated pressure of 1.0 MPa, it can deliver up to 3204 kgf.
The rear adjuster screw allows you to trim the effective travel back from the nominal 85 mm stroke by up to 50 mm. This creates a usable travel window of 35 to 85 mm, enabling fine-tuning of the end position during setup without changing the cylinder.
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