Airtac SAIJ100 Adjustable Cylinder SAIJ100X400-50S
The AirTAC Airtac SAIJ100 Adjustable Cylinder SAIJ100X400-50S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø100mm bore and 400mm stroke, G1/2 air ports and adjustable end cushioning. Its standardized mounting interface makes it a drop-in replacement for other ISO 15552 cylinders in automation lines.
- BoreØ100 mm
- Stroke400 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM20×1.5
- CushionAdjustable, 36 mm
About the Airtac SAIJ100 Adjustable Cylinder SAIJ100X400-50S
The AirTAC SAIJ100X400-50-S is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster, providing a usable travel window of 350 to 400 mm. It delivers substantial thrust, generating 7068 N of push force at 0.9 MPa, making it well-suited for heavy-duty positioning tasks. The integrated -S magnet enables precise position detection using AirTAC CMSE reed or DMSE electronic solid-state sensors housed in the dual-side barrel grooves.
This model features a robust 25 mm carbon steel rod with an M20x1.5 thread, paired with PT tapered port threading for secure pneumatic connections. The rear stopper mechanism allows you to fine-tune the retract end position during commissioning without adding external stops. Remember that this adjuster acts strictly as a travel stop and does not hold the load without live air pressure.
Airtac SAIJ100 Adjustable Cylinder SAIJ100X400-50S Technical Specifications
| Model | Airtac SAIJ100 Adjustable Cylinder SAIJ100X400-50S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø100 mm |
| Stroke | 400 mm |
| Acting type | Double acting |
| Port size | G1/2 |
| Rod thread | M20×1.5 |
| 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 – 800 mm/s |
| Cushion | Adjustable, 36 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 (Ø100mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 3927 N | 3682 N |
| 0.7 MPa | 5498 N | — |
| Max (@1.0 MPa) | 801 kgf | |
Actual usable force is lower than theoretical due to friction and back-pressure. Size with a safety margin.
Model Code: Airtac SAIJ100 Adjustable Cylinder SAIJ100X400-50S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 100 | 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 SAIJ100 Adjustable Cylinder SAIJ100X400-50S Is Used
Machine Setup Changeover
Dial in the 350-400 mm retract position mechanically during product size changes without physically replacing the cylinder or adding external stopper blocks.
Variable End-Stop Diverter
Adjust the stroke window on the fly to accommodate different package lengths on a heavy-duty sorting conveyor, utilizing the 7068 N push force at 0.9 MPa.
Heavy-Duty Positioning
Fine-tune the end of travel for large fixture clamping where the 25 mm rod and M20x1.5 thread provide high structural rigidity against side loads.
Is the Airtac SAIJ100 Adjustable Cylinder SAIJ100X400-50S the Right Cylinder?
Selecting this 100 mm bore cylinder makes sense when your application requires the 5497 N push force at 0.7 MPa it provides, stepping up from an 80 mm bore that yields 3518 N. The 50 mm adjustment range is ideal for product changeovers on a line, letting you dial in the exact 350-400 mm end-stop mechanically rather than swapping out a fixed-stroke SAI cylinder. Because the nominal stroke is 400 mm, the 25 mm rod needs external guiding to prevent excessive side-loading on the seals.
For a true ISO 15552 replacement match, confirm the 100 mm bore, 400 mm stroke, PT port thread, carbon steel rod, and -S magnet. Mounting options for this adjustable profile cylinder include Basic, FA, LB, TC, FTC, TCM1, and TCM2. If your machine requires holding a load statically without continuous air pressure, you must use an external rod lock or switch to a SAIL or BSAI series cylinder, as the SAIJ adjuster is not a locking device.
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 SAIJ100 Adjustable Cylinder SAIJ100X400-50S FAQ
At an operating pressure of 0.9 MPa, this 100 mm bore cylinder provides a push force of 7068 N and a pull force of 3681 N. It achieves a maximum push force of 801 kgf at 1.0 MPa.
The rear adjuster screw allows you to shorten the effective stroke by up to 50 mm, creating a usable travel window of 350 to 400 mm. This stopper only sets the end position and does not lock the load without live air pressure.
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