Airtac SAIJ200 Adjustable Cylinder SAIJ200AX325-40S
The AirTAC Airtac SAIJ200 Adjustable Cylinder SAIJ200AX325-40S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø200mm bore and 325mm 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
- Stroke325 mm
- Port sizeG3/4
- Acting typeDouble acting
- Rod threadM36×2
- CushionAdjustable, 50 mm
About the Airtac SAIJ200 Adjustable Cylinder SAIJ200AX325-40S
The AirTAC SAIJ200X325-40-S is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster, allowing you to dial back the 325 mm nominal travel to a precise 285-325 mm window. It delivers immense thrust, providing 28274 N of push force at 0.9 MPa, making it suitable for heavy-duty pressing and clamping. The extruded aluminum barrel features sensor grooves on both sides, and the included -S magnet works seamlessly with AirTAC CMSE reed and DMSE electronic sensors for end-of-stroke detection.
This model uses a robust 40 mm piston rod with an M36x2 thread and SUS420J2 stainless steel construction (code A) for superior corrosion resistance. Because the 325 mm stroke is substantial, relying on the 40 mm diameter rod alone is insufficient for high side loads; an external guide mechanism is recommended to prevent rod binding and premature seal wear. The rear adjuster acts purely as a mechanical stop to set the retract end position during commissioning, and the variable air cushions at both ends manage deceleration.
Airtac SAIJ200 Adjustable Cylinder SAIJ200AX325-40S Technical Specifications
| Model | Airtac SAIJ200 Adjustable Cylinder SAIJ200AX325-40S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø200 mm |
| Stroke | 325 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 SAIJ200AX325-40S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 200 | Bore size in mm. |
| ×325 | 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 SAIJ200AX325-40S Is Used
Press Fitment Tuning
Dial in the exact 285-325 mm insertion depth for heavy bearing presses without machining custom spacers or swapping out the entire cylinder body.
Product Line Changeover
Quickly adjust the retract end-stop by up to 40 mm when switching between different product sizes on the same conveyor line setup.
Heavy Clamping Stations
Leverage the 28274 N push force at 0.9 MPa to secure large metal fabrications, using the rear stop to regulate the final clamping position.
Is the Airtac SAIJ200 Adjustable Cylinder SAIJ200AX325-40S the Right Cylinder?
Choose this 200 mm bore cylinder when a 160 mm bore (offering 18095 N push at 0.5 MPa) cannot provide enough force for your heavy-load application. The adjustable stroke is ideal for product changeovers on a line, allowing you to fine-tune the end position without swapping the cylinder or adding external stops. For any stroke of 300 mm or more, an external guide is necessary to handle side loads and prevent rod damage.
When replacing an ISO 15552 cylinder, match the 200 mm bore, 325 mm stroke, 40 mm adjustment, PT tapered ports, and the -S magnet. Note that SAIJ 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 and air cushions only decelerate the load; they do not hold it without live air. For fail-safe load holding, consider the SAIL or BSAI series.
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 SAIJ200AX325-40S FAQ
At 0.9 MPa operating pressure, this 200 mm bore cylinder provides 28274 N of push force and 24260 N of pull force. At 0.5 MPa, it delivers 15708 N push and 15080 N pull.
The rear mechanical stopper allows you to shorten the 325 mm nominal stroke by up to 40 mm, creating a usable travel window of 285 to 325 mm. The adjuster sets the end position but does not lock the load without continuous air pressure.
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