Airtac SAIJ200 Adjustable Cylinder SAIJ200AX400-40S
The AirTAC Airtac SAIJ200 Adjustable Cylinder SAIJ200AX400-40S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø200mm bore and 400mm 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
- Stroke400 mm
- Port sizeG3/4
- Acting typeDouble acting
- Rod threadM36×2
- CushionAdjustable, 50 mm
About the Airtac SAIJ200 Adjustable Cylinder SAIJ200AX400-40S
The AirTAC SAIJ200X400-40-S is a double-acting, single-rod ISO 15552 profile cylinder engineered for heavy-duty tasks, delivering 15708 N of push force at 0.5 MPa. It features a 400 mm nominal stroke paired with a rear mechanical adjuster that allows you to dial back the travel by up to 40 mm. This creates a precise 360 to 400 mm usable positioning window, letting you fine-tune the retract end-stop during commissioning without adding external stops.
Built with an SUS420J2 stainless steel rod (material code A) and a robust 40 mm rod diameter with an M36x2 thread, it handles substantial side loads. The extruded aluminum barrel includes sensor grooves on both sides, and because this SKU includes a magnet (-S), it integrates directly with AirTAC CMSE reed and DMSE electronic solid-state switches. Fluid supply must be filtered air (40 um) operating between 0.15 and 1.0 MPa.
Airtac SAIJ200 Adjustable Cylinder SAIJ200AX400-40S Technical Specifications
| Model | Airtac SAIJ200 Adjustable Cylinder SAIJ200AX400-40S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø200 mm |
| Stroke | 400 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 SAIJ200AX400-40S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 200 | Bore size in mm. |
| ×400 | 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 SAIJ200AX400-40S Is Used
Heavy Press Changeover
Dial in the 360-400 mm stroke window during product size changeovers on large forming presses without physically swapping the actuator.
Large Fixture Positioning
Fine-tune the retract position of heavy welding fixtures by up to 40 mm at commissioning to align large structural components accurately.
Variable End-Stop Dosing
Adjust the rear stop screw to modify the full retract distance on heavy material dispensers, allowing quick volume recalibration.
Is the Airtac SAIJ200 Adjustable Cylinder SAIJ200AX400-40S the Right Cylinder?
Selecting this 200 mm bore cylinder makes sense when your application requires extreme thrust, such as 21991 N push at 0.7 MPa, which far exceeds the 10053 N push of the neighbouring 160 mm bore. You would choose this adjustable SAIJ variant over a fixed-stroke SAI when a machine handles multiple product sizes and requires a variable retract end-stop to accommodate changeovers quickly. To match this exact ISO 15552 replacement, specify: 200 mm bore, 400 mm stroke, 40 mm adjustment, PT tapered port threads, and the -S magnet option.
Because the stroke is 400 mm, the extended rod is subject to bending forces; an external guide rail is recommended to prevent premature seal wear. Remember that the rear adjuster acts only as a travel stop and the air cushions handle deceleration, but neither will hold the load if air pressure drops. For true load-holding without live air, consider an AirTAC SAIL pneumatic lock or BSAI clamp-lock cylinder. Mounting options include Basic, FA, LB, TC, FTC, TCM1, and TCM2.
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 SAIJ200AX400-40S FAQ
At 0.5 MPa, it provides 15708 N of push force and 15080 N of pull force. At 0.7 MPa, the push force increases to 21991 N, with a maximum rated push force of 28274 N at 0.9 MPa.
A rear stopper screw lets you mechanically shorten the 400 mm nominal stroke by up to 40 mm, providing an effective travel window of 360 to 400 mm. This stopper sets the end position but does not lock the load without live air pressure.
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