Airtac SAIJ200 Adjustable Cylinder SAIJ200AX400-20S
The AirTAC Airtac SAIJ200 Adjustable Cylinder SAIJ200AX400-20S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø200mm bore and 400mm 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
- Stroke400 mm
- Port sizeG3/4
- Acting typeDouble acting
- Rod threadM36×2
- CushionAdjustable, 50 mm
About the Airtac SAIJ200 Adjustable Cylinder SAIJ200AX400-20S
The AirTAC SAIJ200X400-20-S is a double-acting ISO 15552 profile cylinder featuring a rear-mounted stroke adjuster. It provides a usable travel window of 380 to 400 mm, allowing you to dial back the nominal 400 mm stroke by up to 20 mm during machine commissioning. Belonging to the 200 mm bore class, it delivers massive thrust, pushing 28274 N and pulling 27144 N at 0.9 MPa.
This specific configuration includes a SUS420J2 stainless steel rod (option A) for enhanced corrosion resistance and uses PT tapered port threads. The extruded aluminum barrel features sensor grooves on both sides, and because this is an -S model, it includes a magnet ready for AirTAC CMSE reed and DMSE solid-state switches. The rear adjuster acts purely as a mechanical stop for end-position tuning and does not lock the load without live air pressure.
Airtac SAIJ200 Adjustable Cylinder SAIJ200AX400-20S Technical Specifications
| Model | Airtac SAIJ200 Adjustable Cylinder SAIJ200AX400-20S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø200 mm |
| Stroke | 400 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 SAIJ200AX400-20S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 200 | Bore size in mm. |
| ×400 | 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 SAIJ200AX400-20S Is Used
Heavy Press Tuning
Fine-tune the 380-400 mm travel window during heavy press commissioning to achieve precise end-of-stroke contact without adding external mechanical stops.
Product Size Changeover
Accommodate varying product sizes on a line by adjusting the rear stopper up to 20 mm, ensuring consistent positioning across different batches.
Automated Assembly End-Stop
Set exact retraction limits in large-scale automated assembly machinery where the 200 mm bore's 28274 N push force at 0.9 MPa is required to move heavy pallets.
Is the Airtac SAIJ200 Adjustable Cylinder SAIJ200AX400-20S the Right Cylinder?
Select this 200 mm bore cylinder when your application requires extreme force—up to 3204 kgf at 1.0 MPa—and you need the flexibility to fine-tune the retract end-position without swapping out physical components. If your setup only requires 21991 N of push force at 0.7 MPa, stepping down to a 160 mm bore saves space and weight. The adjustable stroke is ideal for product changeovers where the end-stop varies slightly, unlike a fixed-stroke SAI cylinder.
Because the stroke is 400 mm, the long unsupported rod requires an external guide to prevent excessive side-loading and premature seal wear. For dimensionally interchangeable ISO 15552 replacements, match the 200 mm bore, 400 mm stroke, PT port threads, and -S magnet. Remember that the SAIJ mounting set is limited to Basic, FA, LB, TC, FTC, TCM1, and TCM2. If you need true load-holding without continuous air pressure, use an external rod lock or pilot-operated check valve, or look to the SAIL or BSAI series instead.
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 SAIJ200AX400-20S FAQ
At an operating pressure of 0.9 MPa, this 200 mm bore cylinder provides a push force of 28274 N and a pull force of 27144 N. At the maximum rated pressure of 1.0 MPa, it achieves a push force of 3204 kgf.
The rear adjusting screw acts as a mechanical stop that lets you shorten the effective stroke from 400 mm down to 380 mm. This allows for precise end-position tuning at commissioning without replacing the cylinder, though it does not lock the load when air is removed.
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