Airtac SAIJ100 Adjustable Cylinder SAIJ100X325-40
The AirTAC Airtac SAIJ100 Adjustable Cylinder SAIJ100X325-40 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø100mm bore and 325mm 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
- Stroke325 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM20×1.5
- CushionAdjustable, 36 mm
About the Airtac SAIJ100 Adjustable Cylinder SAIJ100X325-40
The AirTAC SAIJ100X325-40 is a double-acting ISO 15552 profile cylinder featuring a rear mechanical adjuster that trims the nominal 325 mm stroke back by up to 40 mm, yielding a precise 285-325 mm usable travel window. It delivers 3927 N of push force and 3681 N of pull force at 0.5 MPa, making it suitable for heavy-duty positioning tasks. The extruded aluminum barrel includes sensor grooves on both sides, though this configuration omits the magnet, requiring a later -S suffix if CMSE or DMSE switches are needed.
Equipped with a robust 25 mm carbon steel rod and an M20x1.5 thread, this unit handles demanding mechanics, while the PT tapered port ensures a tight pneumatic seal at the G1/2 connection. The rear stopper allows you to fine-tune the retract end-position during commissioning without adding external stops, but remember it acts only as a travel limiter and does not hold the load without live air pressure.
Airtac SAIJ100 Adjustable Cylinder SAIJ100X325-40 Technical Specifications
| Model | Airtac SAIJ100 Adjustable Cylinder SAIJ100X325-40 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø100 mm |
| Stroke | 325 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 SAIJ100X325-40
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 100 | 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 SAIJ100 Adjustable Cylinder SAIJ100X325-40 Is Used
Product Size Changeovers
Dial in the 285-325 mm travel window during line format changes to accommodate different product lengths without physically replacing the actuator.
Heavy Press Positioning
Leverage the 3927 N push force at 0.5 MPa to move heavy pallets or platens, using the rear screw to set the exact pressing depth at commissioning.
Machine Setup Calibration
Fine-tune the retract end-stop during initial machine commissioning to perfect alignment, avoiding the need to bolt on custom external spacers.
Is the Airtac SAIJ100 Adjustable Cylinder SAIJ100X325-40 the Right Cylinder?
Select this 100 mm bore when a 63 mm bore (providing 1559 N push at 0.5 MPa) is insufficient, but a 125 mm bore (6136 N push) would be excessive overkill. The adjustable 40 mm window is ideal for product changeovers on a line, letting you dial in the exact end-stop mechanically rather than swapping out a fixed-stroke SAI cylinder. To match this ISO 15552 footprint for a direct replacement, verify the 325 mm stroke, 40 mm adjustment code, PT port thread, and mounting style.
Because the stroke is 325 mm, the extended 25 mm rod is subject to increased bending moments; an external guide rail is recommended to prevent side-load damage. If your process requires the load to be held mechanically without continuous air pressure, note that the rear adjuster and air cushions only decelerate the stroke, so you should explore an AirTAC SAIL or BSAI locking cylinder instead.
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 SAIJ100X325-40 FAQ
At 0.5 MPa operating pressure, this 100 mm bore cylinder provides 3927 N of push force and 3681 N of pull force. If you increase the pressure to 0.7 MPa, the push force rises to 5497 N.
The rear adjuster acts as a mechanical stop that allows you to shorten the 325 mm nominal stroke by up to 40 mm, creating a usable travel window of 285 to 325 mm. It only sets the end-position and does not lock the load without live air.
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