Airtac SAIJ200 Adjustable Cylinder SAIJ200X425-30
The AirTAC SAIJ200 Adjustable Cylinder SAIJ200X425-30 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø200mm bore and 425mm stroke, G3/4 air ports and adjustable end cushioning. Its standardized mounting interface makes it interchangeable with other ISO 15552 cylinders at the mounting interface.
- BoreØ200 mm
- Stroke425 mm
- Port sizeG3/4
- Acting typeDouble acting
- Rod threadM36×2
- CushionAdjustable, 50 mm
- No minimum order. A single piece can be ordered.
- Ready in 3–5 business days. That is the time we take to process the order and hand it to the carrier. Transit time after that depends on the destination.
About the Airtac SAIJ200 Adjustable Cylinder SAIJ200X425-30
The AirTAC SAIJ200X425-30 is a double-acting ISO 15552 profile cylinder featuring a rear-mounted stroke adjuster. It provides a usable travel window of 395 to 425 mm, allowing you to dial back the nominal 425 mm stroke by up to 30 mm during commissioning. The extruded aluminum barrel includes sensor grooves on both sides for flexible switch placement.
This model uses a reduced mounting interface set—Basic, FA, LB, TC, FTC, TCM1, and TCM2—omitting the FB, CA, CB, and CR options found on some other variants. The rear adjuster acts purely as a mechanical stop to fine-tune the end position without swapping the cylinder, while the built-in variable air cushions handle end-of-stroke deceleration. Neither the adjuster nor the cushions will hold a load without live air pressure.
Airtac SAIJ200 Adjustable Cylinder SAIJ200X425-30 Technical Specifications
| Model | Airtac SAIJ200 Adjustable Cylinder SAIJ200X425-30 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø200 mm |
| Stroke | 425 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 | 15080 N | 15080 N |
| 0.7 MPa | 21111 N | — |
| Max (@1.0 MPa) | 3075 kgf | |
Double-rod model: the rod passes through the rear cover, so both piston faces lose rod area and push is shown at the annular-area value. Actual usable force is lower than theoretical due to friction and back-pressure. Size with a safety margin.
Model Code: Airtac SAIJ200 Adjustable Cylinder SAIJ200X425-30
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 200 | Bore size in mm. |
| ×425 | 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 SAIJ200X425-30 Is Used
Heavy Machinery Changeover
Dial in the 395-425 mm travel window during machine setup to accommodate different large product sizes without replacing the cylinder.
Variable End Stops
Use the rear stopper to fine-tune the final retracted position precisely, ensuring accurate positioning of heavy industrial loads.
Assembly Press Tuning
Adjust the effective stroke on-site during commissioning to perfect the pressing depth of large components, avoiding external stops.
Is the Airtac SAIJ200 Adjustable Cylinder SAIJ200X425-30 the Right Cylinder?
If your application requires less force, stepping down to a 160 mm bore yields 10053 N, making it a lighter, more compact alternative. The adjustable stroke is highly beneficial for product changeovers on large machinery, allowing you to set variable end stops on the fly without adding external stopper blocks.
Because the 425 mm stroke is substantial and the rod is heavy, an external guide is strongly recommended to prevent excessive side-loading on the rod and rod thread. For applications requiring the cylinder to hold its position without continuous air pressure, this plain SAIJ model is insufficient; you should instead look at the SAIL (air-released lock) or BSAI (clamp-lock) series. This cylinder is dimensionally interchangeable per ISO 15552 standards.
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 SAIJ200X425-30 FAQ
At 0.7 MPa, the push force increases to 21991 N.
The rear adjuster acts as a mechanical stop that lets you shorten the effective travel from 425 mm down to 395 mm. It sets the end position but does not lock or hold the load without live air pressure.
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