Airtac SAIJ200 Adjustable Cylinder SAIJ200AX185-20S
The AirTAC Airtac SAIJ200 Adjustable Cylinder SAIJ200AX185-20S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø200mm bore and 185mm 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
- Stroke185 mm
- Port sizeG3/4
- Acting typeDouble acting
- Rod threadM36×2
- CushionAdjustable, 50 mm
About the Airtac SAIJ200 Adjustable Cylinder SAIJ200AX185-20S
The AirTAC SAIJ200X185-20-S is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster, providing a usable travel window of 165 to 185 mm. Delivering 15708 N of push force at 0.5 MPa, this bore 200 unit handles heavy-duty positioning. The extruded aluminum barrel features sensor grooves on both sides, and this -S variant includes a magnet for precise end-of-stroke detection using AirTAC CMSE reed or DMSE electronic solid-state switches.
This model features a SUS420J2 stainless steel rod (code A) and PT tapered port threads. The external rear adjusting screw acts purely as a travel stop to fine-tune the retract end position during commissioning. It does not lock or hold the load without live air pressure; for fail-safe load holding, consider the SAIL or BSAI series instead.
Airtac SAIJ200 Adjustable Cylinder SAIJ200AX185-20S Technical Specifications
| Model | Airtac SAIJ200 Adjustable Cylinder SAIJ200AX185-20S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø200 mm |
| Stroke | 185 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 SAIJ200AX185-20S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 200 | Bore size in mm. |
| ×185 | 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 SAIJ200AX185-20S Is Used
Heavy Press Tuning
Dial in the exact 165 to 185 mm retract distance during heavy press commissioning to accommodate varying material thicknesses without external mechanical stops.
Product Line Changeover
Quickly adjust the end position on automated assembly lines when switching between product sizes, leveraging the 20 mm adjustment range to save setup time.
Large Material Positioning
Move heavy workpieces with 15708 N of thrust at 0.5 MPa, using the rear stopper to fine-tune the resting coordinate precisely to the machine zero point.
Is the Airtac SAIJ200 Adjustable Cylinder SAIJ200AX185-20S the Right Cylinder?
Choose this 200 mm bore cylinder when an application requires up to 15708 N of thrust at 0.5 MPa (or 21991 N at 0.7 MPa) alongside a variable end-stop. If your force requirements are lower, stepping down to a 160 mm bore yields 10053 N at 0.5 MPa, which may offer a more compact footprint. The adjustable 20 mm window is ideal for product changeovers, allowing you to dial in the exact retract distance without swapping cylinders or adding external stops.
When specifying a replacement, match the 200 mm bore, 185 mm nominal stroke, 20 mm adjustment, PT port threads, and the -S magnet. The SAIJ mounting set includes Basic, FA, LB, TC, FTC, TCM1, and TCM2—omitting the FB, CA, CB, and CR brackets found on other types. Because the stroke is 185 mm, standard internal air cushions at both ends manage deceleration, though long unsupported loads still require an external guide to prevent rod side-loading damage.
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 SAIJ200AX185-20S FAQ
At a 0.5 MPa operating pressure, this 200 mm bore cylinder provides 15708 N of push force and 15080 N of pull force. It can reach a maximum push force of 28274 N at 0.9 MPa.
The rear adjuster screw limits the piston's retract travel, creating a usable stroke window between 165 and 185 mm. It functions strictly as a travel stop and does not hold the load without continuous air pressure.
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