Airtac SAIJ40 Adjustable Cylinder SAIJ40BX325-10S
The AirTAC Airtac SAIJ40 Adjustable Cylinder SAIJ40BX325-10S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø40mm bore and 325mm stroke, G1/4 air ports and adjustable end cushioning. Its standardized mounting interface makes it a drop-in replacement for other ISO 15552 cylinders in automation lines.
- BoreØ40 mm
- Stroke325 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM12×1.25
- CushionAdjustable, 30 mm
About the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX325-10S
The AirTAC SAIJ40X325-10-S is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster. It provides a usable travel window of 315 to 325 mm, enabling precise end-position tuning at commissioning without swapping out the unit. Delivering 628 N of push force at 0.5 MPa, it integrates a SUS304 stainless steel rod for superior corrosion resistance and includes a magnet for CMSE reed and DMSE electronic sensors.
The rear adjustment screw acts purely as a mechanical stop to fine-tune the retract stroke; it does not hold the load without live air pressure. Because the 325 mm stroke is relatively long, the 16 mm rod and M12x1.25 thread should be paired with an external guide to prevent excessive side-loading. This model features PT tapered ports and supports a reduced mounting set including Basic, FA, LB, TC, FTC, TCM1, and TCM2.
Airtac SAIJ40 Adjustable Cylinder SAIJ40BX325-10S Technical Specifications
| Model | Airtac SAIJ40 Adjustable Cylinder SAIJ40BX325-10S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø40 mm |
| Stroke | 325 mm |
| Acting type | Double acting |
| Port size | G1/4 |
| Rod thread | M12×1.25 |
| 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, 30 mm |
| Max stroke | Up to 1200 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 (Ø40mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 628 N | 528 N |
| 0.7 MPa | 880 N | — |
| Max (@1.0 MPa) | 128 kgf | |
Actual usable force is lower than theoretical due to friction and back-pressure. Size with a safety margin.
Model Code: Airtac SAIJ40 Adjustable Cylinder SAIJ40BX325-10S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 40 | 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 SAIJ40 Adjustable Cylinder SAIJ40BX325-10S Is Used
Machine Changeover
Dial in the 315-325 mm travel window during product format changes to set exact retract distances without changing hardware.
End-Stop Calibration
Use the rear adjuster to fine-tune the final end position during commissioning, compensating for mechanical tolerance stack-up.
Washdown Assembly
Leverage the SUS304 stainless steel rod and standard double-acting operation for reliable actuation in corrosive or washdown environments.
Is the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX325-10S the Right Cylinder?
Choose this 40 mm bore when you need more thrust than the 32 mm version (402 N at 0.5 MPa) but want to avoid the larger footprint of the 50 mm cylinder. The 10 mm adjustable range is selected over a fixed-stroke SAI when a machine requires variable end-stops to accommodate minor product size changes on the line. For load-holding without continuous air pressure, this cylinder is insufficient; you must specify an SAIL air-released lock, a BSAI clamp-lock, or an external pilot-operated check valve. When replacing an ISO 15552 cylinder, match the 40 mm bore, 325 mm stroke, PT port threads, and the -S magnet requirement.
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 SAIJ40 Adjustable Cylinder SAIJ40BX325-10S FAQ
At 0.5 MPa, this 40 mm bore cylinder provides 628 N of push force and 528 N of pull force. The operational speed range is 30-800 mm/s.
The rear adjuster screw lets you shorten the 325 mm nominal stroke by up to 10 mm, creating a 315-325 mm travel window. It functions as a travel stop and does not lock the load without live air.
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