Airtac SAIJ40 Adjustable Cylinder SAIJ40AX325-75
The AirTAC SAIJ40 Adjustable Cylinder SAIJ40AX325-75 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 interchangeable with other ISO 15552 cylinders at the mounting interface.
- BoreØ40 mm
- Stroke325 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM12×1.25
- CushionAdjustable, 30 mm
- No minimum order. A single piece can be ordered.
- Ready in 3–5 business days. That is the time we take to process the order and hand it to the carrier. Transit time after that depends on the destination.
About the Airtac SAIJ40 Adjustable Cylinder SAIJ40AX325-75
The AirTAC SAIJ40X325-75 is a double-acting, double-rod ISO 15552 profile cylinder featuring a rear mechanical adjuster. It provides a nominal 325 mm stroke that can be dialed back by up to 75 mm, creating a precise 250-325 mm usable travel window for on-the-fly positioning.
This variant is built with an SUS420J2 stainless steel rod (material code A) for improved corrosion resistance compared to standard carbon steel. It uses PT tapered port threads (G1/4) and lacks a standard piston magnet, meaning it requires external proximity sensors rather than AirTAC CMSE reed or DMSE electronic switches unless specifically modified. The extruded aluminum barrel includes sensor grooves on both sides for flexible mounting.
Airtac SAIJ40 Adjustable Cylinder SAIJ40AX325-75 Technical Specifications
| Model | Airtac SAIJ40 Adjustable Cylinder SAIJ40AX325-75 |
|---|---|
| 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 | 528 N | 528 N |
| 0.7 MPa | 739 N | — |
| Max (@1.0 MPa) | 108 kgf | |
Double-rod model: the rod passes through the rear cover, so both piston faces lose rod area and push is shown at the annular-area value. Actual usable force is lower than theoretical due to friction and back-pressure. Size with a safety margin.
Model Code: Airtac SAIJ40 Adjustable Cylinder SAIJ40AX325-75
| 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 SAIJ40AX325-75 Is Used
Machine Changeover
Dial in the 250-325 mm travel window rapidly when switching between product sizes on a packaging line, avoiding the need to bolt on external hard stops.
Variable End Stops
Sort or divert items on a conveyor by adjusting the retract position on the fly to accommodate different package depths without changing the cylinder.
Setup Commissioning
Fine-tune the final end-of-stroke position during initial machine build to perfectly time the 16 mm rod extension against mechanical limits.
Is the Airtac SAIJ40 Adjustable Cylinder SAIJ40AX325-75 the Right Cylinder?
Choose this 40 mm bore adjustable cylinder when an application requires fine-tuning the retract end-position during commissioning or product changeover without physically swapping components. Because the 325 mm stroke is relatively long, an external guide is recommended to support the load and prevent excessive side-loading on the 16 mm rod.
The rear screw acts purely as a travel stop and works alongside the standard adjustable air cushions to decelerate the load, but it does not lock the rod in place without live air pressure. For load-holding requirements, consider the SAIL (air-released lock) or BSAI (clamp-lock) variants. This SAIJ model accepts a reduced set of ISO 15552 mounting interfaces: Basic, FA, LB, TC, FTC, TCM1, and TCM2 (omitting FB, CA, CB, and CR).
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 SAIJ40AX325-75 FAQ
At the maximum 1.0 MPa pressure, it can deliver up to 128 kgf.
The rear adjuster screw allows you to shorten the effective stroke by up to 75 mm from the nominal 325 mm, giving a usable travel range of 250-325 mm. It functions as a mechanical stop to set the end position and does not hold the load without continuous air pressure.
Authorized Export Seller
Genuine AirTAC parts produced by AirTAC factory.
1-Year Warranty
Covers non-human-caused product damage.
Fast Dispatch
Standard models are processed and dispatched in 3-5 business days.
Fast Reply
Most inquiries answered within 7-8 hours.
Request a Quote for Airtac SAIJ40 Adjustable Cylinder SAIJ40AX325-75
Send us the quantity and destination. We confirm price, stock and lead time — usually within 7-8 hours.