Airtac SAIJ200 Adjustable Cylinder SAIJ200AX425-50
The AirTAC Airtac SAIJ200 Adjustable Cylinder SAIJ200AX425-50 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 SAIJ200AX425-50
The AirTAC SAIJ200X425-50 is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster, delivering massive thrust up to 28274N at 0.9 MPa. It provides a usable travel window of 375 to 425 mm, allowing you to dial in the exact retract position without adding external stops. The 40 mm piston rod is constructed from SUS420J2 stainless steel, offering high resistance to corrosion and wear in harsh environments.
This adjustable-stroke model allows fine end-position tuning at commissioning or during product changeovers, eliminating the need to swap the entire cylinder. The rear screw acts purely as a mechanical stop to set the travel end, complementing the standard variable air cushions at both ends. It is dimensionally interchangeable per ISO 15552 and features an extruded aluminum barrel with sensor grooves on both sides.
Airtac SAIJ200 Adjustable Cylinder SAIJ200AX425-50 Technical Specifications
| Model | Airtac SAIJ200 Adjustable Cylinder SAIJ200AX425-50 |
|---|---|
| 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 SAIJ200AX425-50
| 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 SAIJ200AX425-50 Is Used
Heavy Pressing Operations
Provides up to 28274N of thrust for assembling large components, with the 50 mm adjuster allowing precise bottoming-out tuning without mechanical shims.
Product Line Changeover
Quickly modify the retract distance from 375 to 425 mm when switching part sizes on a production line, minimizing downtime.
Variable End-Stop Setup
Ideal for automated machinery requiring exact positioning at the retract end, where the rear stopper fine-tunes the travel window during commissioning.
Is the Airtac SAIJ200 Adjustable Cylinder SAIJ200AX425-50 the Right Cylinder?
Choose this 200 mm bore when your application requires extreme force, such as heavy pressing or large load manipulation, since it yields 21991N of push force at 0.7 MPa. If your force requirements are lower, stepping down to a 160 mm bore provides 14074N at 0.7 MPa, which may better suit medium-duty machinery. Because the stroke is 425 mm, long unsupported travel necessitates an external guide to prevent side-loading damage to the rod and seals.
The adjustable stroke is ideal for setups needing variable end-stops on the fly, rather than committing to a fixed-stroke SAI cylinder. Note that the rear adjuster and air cushions only decelerate the travel end; they do not hold the load without live air pressure. For load-holding requirements without continuous air, consider the SAIL or BSAI series. This configuration uses PT tapered ports and omits the FB, CA, CB, and CR mounting options, utilizing a reduced set of Basic, FA, LB, TC, FTC, TCM1, and TCM2 mounts.
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 SAIJ200AX425-50 FAQ
The rear adjuster screw lets you shorten the effective stroke by up to 50 mm, creating a usable travel window between 375 and 425 mm. It acts as a mechanical stop to fine-tune the end position at commissioning without swapping cylinders.
At an operating pressure of 0.9 MPa, the SAIJ200X425-50 generates a push force of 28274N and a pull force of 15080N. It operates at a speed range of 30-500 mm/s.
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