Airtac SAIJ100 Adjustable Cylinder SAIJ100BX325-40
The AirTAC Airtac SAIJ100 Adjustable Cylinder SAIJ100BX325-40 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 SAIJ100BX325-40
The AirTAC SAIJ100X325-40 is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster. It provides a 285-325mm usable travel window by allowing you to dial back the 325mm nominal stroke by up to 40mm during commissioning. Delivering 3927N of push force at 0.5MPa, it handles heavy-duty positioning tasks. This configuration uses a SUS304 stainless steel rod for enhanced corrosion resistance and pairs with PT tapered port threads.
The adjustable rear stopper acts solely as a travel end-point, meaning it cannot hold a load without continuous live air pressure. For true load-holding without air, an external pilot-operated check valve or a related AirTAC locking cylinder like the SAIL or BSAI is required. The extruded aluminum barrel includes sensor grooves on both sides, ready for CMSE reed or DMSE electronic switches if a magnet is added later.
Airtac SAIJ100 Adjustable Cylinder SAIJ100BX325-40 Technical Specifications
| Model | Airtac SAIJ100 Adjustable Cylinder SAIJ100BX325-40 |
|---|---|
| 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 SAIJ100BX325-40
| 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 SAIJ100BX325-40 Is Used
Machine Setup & Changeover
Fine-tune the 285-325mm travel window during line changeovers to accommodate different product lengths without physically replacing the actuator.
Heavy-Duty Positioning
Leverage the 3927N push force at 0.5MPa to move heavy jigs or tooling into exact working positions, relying on the rear stopper to dial in the final coordinate.
Variable End-Stop Assembly
Use the 40mm adjustment range to set precise pressing or clamping depths on the fly, avoiding the need to bolt on secondary external stop blocks.
Is the Airtac SAIJ100 Adjustable Cylinder SAIJ100BX325-40 the Right Cylinder?
Select this 100mm bore cylinder when your application requires substantial thrust—stepping up from a 63mm bore yields 1559N push force at 0.5MPa, while dropping to an 80mm bore reduces it to 2513N. The adjustable stroke is ideal for product changeovers or variable end-stops, letting you fine-tune the exact 285-325mm position without swapping the cylinder or adding external stops. When matching an ISO 15552 replacement, verify the 325mm stroke, 40mm adjuster, PT G1/2 port, and the SUS304 (B) rod material.
Because the 325mm stroke is relatively long, the 25mm rod diameter should still be supported by an external guide to prevent excessive side-loading and premature seal wear. Note that the SAIJ mounting set is limited to Basic, FA, LB, TC, FTC, TCM1, and TCM2, omitting FB, CA, CB, and CR brackets.
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 SAIJ100BX325-40 FAQ
At a 0.5MPa operating pressure, this 100mm bore cylinder provides 3927N of push force and 3681N of pull force. If you increase the pressure to 0.7MPa, the push force rises to 5497N.
The rear adjuster screw lets you mechanically shorten the 325mm nominal stroke by up to 40mm, creating a usable travel window of 285-325mm. The adjuster acts as a physical stop to tune end-positions at commissioning, but it does not lock or hold the load without live air pressure.
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