Airtac SAIJ200 Adjustable Cylinder SAIJ200AX425-40
The AirTAC Airtac SAIJ200 Adjustable Cylinder SAIJ200AX425-40 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 SAIJ200AX425-40
The AirTAC SAIJ200X425-40 is a double-acting ISO 15552 profile cylinder engineered for heavy-duty applications, featuring a robust 200 mm bore and a 425 mm nominal stroke. An integrated rear adjusting screw allows you to fine-tune the effective travel, providing a usable window of 385 to 425 mm. This built-in adjustability enables precise end-position tuning during commissioning without the need to physically swap the cylinder or bolt on external stopper blocks.
Delivering substantial thrust, this model generates 15708 N of push force and 15080 N of pull force at 0.5 MPa, peaking at 3204 kgf at 1.0 MPa. It features a SUS420J2 stainless steel rod for enhanced durability and utilizes PT tapered port threads with a G3/4 connection. Operating at speeds of 30-500 mm/s, the extruded aluminum barrel includes dual sensor grooves, though this specific configuration omits the magnet required for CMSE or DMSE electronic switches.
Airtac SAIJ200 Adjustable Cylinder SAIJ200AX425-40 Technical Specifications
| Model | Airtac SAIJ200 Adjustable Cylinder SAIJ200AX425-40 |
|---|---|
| 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 SAIJ200AX425-40
| 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 SAIJ200AX425-40 Is Used
Heavy Press Tuning
Dial in the exact 385-425 mm end-stop during heavy press commissioning to accommodate varying material thicknesses without changing the cylinder.
Pallet Changeover
Adjust the rear stroke stopper quickly on the fly to handle different pallet sizes on a high-force transfer line.
Large Mold Handling
Position heavy molds precisely by trimming the effective stroke up to 40 mm, avoiding the need for external mechanical stops.
Is the Airtac SAIJ200 Adjustable Cylinder SAIJ200AX425-40 the Right Cylinder?
Selecting this 200 mm bore cylinder is appropriate when your application demands massive linear force that smaller bores cannot provide, such as replacing a 160 mm bore that only yields 10053 N push force at 0.5 MPa. The adjustable 385-425 mm travel window is highly beneficial for heavy machinery requiring frequent product-size changeovers, allowing operators to dial in the exact end-stop mechanically. Because the 425 mm stroke is substantial, always support the load with an external guide to prevent excessive side-loading on the 40 mm rod, despite the robust M36x2 rod thread.
When specifying a replacement, ensure you match the 200 mm bore, 425 mm stroke, 40 mm adjustment range, PT G3/4 port, and the absence of a magnet. This SAIJ model uses a reduced mounting set (Basic, FA, LB, TC, FTC, TCM1, TCM2) and omits FB, CA, CB, and CR brackets. Remember that the rear adjuster functions strictly as a travel stop, not a lock; the cylinder will not hold a load without live air, so consider an AirTAC SAIL or BSAI cylinder if true load-holding is required.
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 SAIJ200AX425-40 FAQ
At 0.5 MPa, this 200 mm bore cylinder provides a push force of 15708 N and a pull force of 15080 N. At its maximum operating pressure of 1.0 MPa, it delivers a peak force of 3204 kgf.
The rear adjuster screw acts as a mechanical stop that lets you shorten the 425 mm nominal stroke by up to 40 mm, creating a usable travel window of 385 to 425 mm. It only sets the end position and does not lock the load without continuous air pressure.
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