Airtac SAIJ200 Adjustable Cylinder SAIJ200AX425-20S
The AirTAC Airtac SAIJ200 Adjustable Cylinder SAIJ200AX425-20S 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 a drop-in replacement for other ISO 15552 cylinders in automation lines.
- BoreØ200 mm
- Stroke425 mm
- Port sizeG3/4
- Acting typeDouble acting
- Rod threadM36×2
- CushionAdjustable, 50 mm
About the Airtac SAIJ200 Adjustable Cylinder SAIJ200AX425-20S
The AirTAC SAIJ200X425-20-S is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster, allowing you to dial back the 425mm nominal stroke by up to 20mm. This yields a precise 405-425mm usable travel window, enabling fine end-position tuning during commissioning without swapping the barrel or adding external stops. It delivers substantial thrust, pushing with 15708N and pulling with 15080N at 0.5 MPa.
This configuration features a SUS420J2 stainless steel rod (option A) for enhanced corrosion resistance and includes a magnet (-S) for position sensing with AirTAC CMSE reed and DMSE electronic switches. The robust 40mm rod and M36x2 thread handle high side loads well, though at 425mm of travel, an external guide is still recommended to prevent rod wear. The adjuster acts purely as a travel stop and does not hold the load without live air.
Airtac SAIJ200 Adjustable Cylinder SAIJ200AX425-20S Technical Specifications
| Model | Airtac SAIJ200 Adjustable Cylinder SAIJ200AX425-20S |
|---|---|
| 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 | 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 SAIJ200AX425-20S
| 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 SAIJ200AX425-20S Is Used
Heavy Pressing Operations
Dial in the exact 405-425mm end-stop for large-scale pressing and forming tasks, ensuring precise contact force during machine setup without physical spacers.
Product Size Changeover
Quickly adapt automated machinery to varying product lengths by adjusting the retract position up to 20mm, minimizing downtime between production runs.
Large Fixture Clamping
Secure oversized workpieces on a conveyor by fine-tuning the clamping endpoint, using the 200mm bore's massive 15708N push force at 0.5 MPa.
Is the Airtac SAIJ200 Adjustable Cylinder SAIJ200AX425-20S the Right Cylinder?
Choose this 200mm bore cylinder when your application requires extreme force, such as the 15708N push at 0.5 MPa, and you need the flexibility to trim the retract end-position by up to 20mm for product changeovers. If your process demands less force, stepping down to a 160mm bore provides 10053N of push force at 0.5 MPa, which may be sufficient and lighter. Because this is a 425mm stroke, you must use an external guide to support the load and prevent excessive side-load wear on the rod seals.
This SAIJ model is dimensionally interchangeable per ISO 15552 and uses a reduced mounting set (Basic, FA, LB, TC, FTC, TCM1, TCM2), omitting FB, CA, CB, and CR. It features PT tapered ports. For load-holding without live air pressure, the rear adjuster is insufficient as it is only a stop; you would need to look at the SAIL (air-released lock) or BSAI (clamp-lock) cylinders 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 SAIJ200AX425-20S FAQ
At a 0.5 MPa operating pressure, this 200mm bore cylinder provides a push force of 15708N and a pull force of 15080N. At 0.7 MPa, the push force increases to 21991N.
The rear adjuster screw acts as a mechanical stop that lets you shorten the 425mm nominal stroke by up to 20mm, creating a 405-425mm usable travel window. It only sets the end position and does not lock or hold the load without continuous air pressure.
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