Airtac SAIJ40 Adjustable Cylinder SAIJ40X75-75S
The AirTAC Airtac SAIJ40 Adjustable Cylinder SAIJ40X75-75S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø40mm bore and 75mm 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
- Stroke75 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 SAIJ40X75-75S
The AirTAC SAIJ40X75-75-S is a double-acting, single-rod ISO 15552 profile cylinder featuring a rear-mounted stroke adjuster. It provides a usable travel window of 0-75 mm, allowing you to dial in the exact end position during commissioning without swapping out the unit. In this specific configuration, the 75 mm adjustment range fully matches the 75 mm nominal stroke, effectively allowing the retract end-position to be varied across the entire stroke length. The 40 mm bore generates 879 N of push force at 0.7 MPa, making it well-suited for moderate load positioning tasks.
This variant includes a standard carbon steel piston rod and a built-in magnet (-S) for electronic position sensing. It is designed to work seamlessly with AirTAC CMSE reed switches and DMSE solid-state sensors fitted into the dual-side sensor grooves on the extruded aluminum barrel. The rear adjuster acts purely as a mechanical stop to fine-tune travel; it does not lock or hold the load without continuous air pressure.
Airtac SAIJ40 Adjustable Cylinder SAIJ40X75-75S Technical Specifications
| Model | Airtac SAIJ40 Adjustable Cylinder SAIJ40X75-75S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø40 mm |
| Stroke | 75 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 SAIJ40X75-75S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×75 | 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 SAIJ40X75-75S Is Used
Machine Changeover
Dial in the exact retract position from 0 to 75 mm during product size transitions without physically replacing the cylinder or adding external stopper blocks.
End-Position Tuning
Fine-tune the final end-of-stroke location during initial commissioning to perfect a mechanical pick-off or engagement point on an assembly fixture.
Variable Diverter Stops
Adjust the travel distance on the fly to handle different package sizes on a conveyor line, ensuring precise physical stops for sorting operations.
Is the Airtac SAIJ40 Adjustable Cylinder SAIJ40X75-75S the Right Cylinder?
Choose this 40 mm bore adjustable cylinder when your application requires variable end-stops or frequent machine changeovers, stepping down from a 50 mm bore (which yields 1374 N push at 0.7 MPa) if your loads are lighter and you need a more compact footprint. The SAIJ40X75-75-S is specified with PT tapered port threads and a carbon steel rod. Because the adjustment range equals the full stroke, you can effectively reduce the travel down to zero if needed for setup, which is highly advantageous for product-size changes on a line.
When replacing an ISO 15552 cylinder, match the 40 mm bore, 75 mm stroke, PT port, and mounting choice from the SAIJ subset (Basic, FA, LB, TC, FTC, TCM1, TCM2). Note that the rear adjuster and the variable air cushions at both ends only decelerate the travel end; they do not function as a brake. For load-holding without live air pressure, consider an external rod lock or pilot-operated check valve.
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 SAIJ40X75-75S FAQ
The 40 mm bore generates a push force of 879 N and a pull force of 528 N at 0.7 MPa. At the maximum operating pressure of 1.0 MPa, it provides up to 128 kgf of push force.
The rear adjusting screw allows you to mechanically shorten the effective stroke by up to 75 mm. Since the nominal stroke is 75 mm, you can trim the travel window anywhere from 0 to 75 mm to achieve the exact end-position required without altering the cylinder's fixed mounting.
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