Airtac SAIJ200 Adjustable Cylinder SAIJ200AX425-40S
The AirTAC Airtac SAIJ200 Adjustable Cylinder SAIJ200AX425-40S 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 SAIJ200AX425-40S
The AirTAC SAIJ200X425-40-S is a double-acting, single-rod ISO 15552 profile cylinder equipped with a rear stroke adjuster. It provides a substantial 28274N of thrust at 0.9 MPa and features a SUS420J2 stainless steel rod. By turning the rear adjustment screw, you can shorten the effective travel from its 425mm nominal length down to a 385mm minimum, creating a precise 385-425mm usable window. This built-in adjustability allows you to fine-tune the retract end position at commissioning without physically swapping the cylinder or adding external stops.
Because this is a massive 200mm bore unit, it uses G3/4 PT tapered ports and a robust 40mm cushion length to manage high kinetic energy. The extruded aluminum barrel includes sensor grooves on both sides, and the included -S magnet pairs directly with AirTAC CMSE reed and DMSE electronic solid-state switches for exact positioning feedback. The 40mm diameter carbon steel-based rod thread handles extreme loads, though the rear screw acts purely as a travel stop and does not lock the load without live air pressure.
Airtac SAIJ200 Adjustable Cylinder SAIJ200AX425-40S Technical Specifications
| Model | Airtac SAIJ200 Adjustable Cylinder SAIJ200AX425-40S |
|---|---|
| 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 SAIJ200AX425-40S
| 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 SAIJ200AX425-40S Is Used
Heavy Press Tuning
Dial in the exact 385-425mm retract position during heavy press commissioning to accommodate varying material thicknesses without changing the cylinder.
Product Changeover
Rapidly adjust the end-stop for different large product sizes on a high-thrust production line, minimizing downtime between manufacturing runs.
Assembly Station Setup
Fine-tune the retract distance on heavy-duty assembly machinery to ensure precise end-of-stroke positioning against rigid mechanical stops.
Is the Airtac SAIJ200 Adjustable Cylinder SAIJ200AX425-40S the Right Cylinder?
Selecting this 200mm bore adjustable cylinder makes sense when your application requires extreme thrust, such as 28274N push force at 0.9 MPa, alongside variable end-stop positioning. If you need less force, stepping down to a 160mm bore yields 18095N of push force at 0.9 MPa, which might better suit medium-heavy machinery while retaining a similar adjustment range. The SAIJ200X425-40-S is chosen over a fixed-stroke SAI cylinder when you need machine setup flexibility or product-size changeovers on the fly. It supports a mounting subset of Basic, FA, LB, TC, FTC, TCM1, and TCM2.
Since the nominal stroke is 425mm, which is 300mm or greater, the long unsupported piston rod will require an external guide to prevent excessive side-loading and premature seal wear. Remember that the rear adjuster and the air cushions only decelerate the travel end; they do not hold the load. For true position holding without live air pressure, you must integrate an external rod lock, a pilot-operated check valve, or switch to an AirTAC SAIL or BSAI clamping cylinder. This SAIJ unit 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 SAIJ200AX425-40S FAQ
At an operating pressure of 0.9 MPa, this 200mm bore cylinder provides a push force of 28274N and a pull force of 15080N. The maximum thrust at 1.0 MPa is 3204 kgf.
The rear adjusting screw allows you to trim the effective stroke by up to 40mm, giving you a usable travel window between 385mm and 425mm. This stopper fine-tunes the end position but does not lock the load without continuous air pressure.
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