Airtac SAIJ40 Adjustable Cylinder SAIJ40BX750-75S
The AirTAC Airtac SAIJ40 Adjustable Cylinder SAIJ40BX750-75S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø40mm bore and 750mm 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
- Stroke750 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM12×1.25
- CushionAdjustable, 30 mm
About the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX750-75S
The AirTAC SAIJ40X750-75-S is a double-acting, single-rod ISO 15552 profile cylinder equipped with a rear stroke adjuster. It delivers 628N of push force at 0.5 MPa and features a 750mm nominal stroke that can be fine-tuned down by up to 75mm, yielding a precise 675-750mm usable travel window. This built-in adjustability allows you to dial in the retract end-position at commissioning without swapping the cylinder or adding external stops.
This configuration includes a SUS304 stainless steel rod for superior corrosion resistance and a magnet (-S) for position sensing. It is fully compatible with AirTAC CMSE reed and DMSE electronic solid-state switches mounted in the dual-side sensor grooves. The extruded aluminum barrel maintains standard ISO 15552 mounting dimensions while omitting the FB, CA, CB, and CR bracket options found on some fixed-stroke variants.
Airtac SAIJ40 Adjustable Cylinder SAIJ40BX750-75S Technical Specifications
| Model | Airtac SAIJ40 Adjustable Cylinder SAIJ40BX750-75S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø40 mm |
| Stroke | 750 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 SAIJ40BX750-75S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×750 | 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 SAIJ40BX750-75S Is Used
Product Changeovers
Quickly dial in the 675-750mm retract position during format size changes on a packaging line without bolting on new external stoppers.
End-Position Tuning
Fine-tune the exact end-of-stroke landing point during machine commissioning to prevent mechanical crashing and optimize motion sequences.
Variable Diverter Stops
Adjust the physical stop distance on the fly for conveyor sorting arms handling different package lengths.
Is the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX750-75S the Right Cylinder?
Select this 40mm bore when an application requires approximately 628N push force at 0.5 MPa, stepping up from a 32mm bore (402N) if more thrust is needed, or down from a 50mm bore (982N) to save space. The 75mm adjustment window is ideal for product changeovers on a line, letting you reposition the retract stop quickly. Because the stroke is 750mm, the 16mm rod and M12x1.25 thread will still experience leverage forces; an external guide is recommended to prevent excessive side-loading.
For an exact ISO 15552 replacement, match the 40mm bore, 750mm stroke, 75mm adjustment, PT tapered port threads, and the -S magnet. Remember that the rear adjuster acts only as a travel stop and the air cushions handle deceleration; neither will hold a load without live air. If static load-holding is required without continuous air pressure, consider an AirTAC SAIL or BSAI 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 SAIJ40 Adjustable Cylinder SAIJ40BX750-75S FAQ
The rear adjuster screw allows you to shorten the effective stroke by up to 75mm. This creates a usable travel window of 675-750mm, letting you set the exact retract end-position without changing the cylinder's physical mounting.
At 0.5 MPa operating pressure, it provides 628N of push force and 528N of pull force. At 0.7 MPa, the push force increases to 879N.
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