Airtac SAIJ40 Adjustable Cylinder SAIJ40BX75-75S
The AirTAC Airtac SAIJ40 Adjustable Cylinder SAIJ40BX75-75S 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
About the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX75-75S
The AirTAC SAIJ40X75-75-S is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster that allows you to fine-tune the end position. With a 75 mm nominal stroke and a 75 mm adjustment range, this model provides a highly flexible 0 to 75 mm usable travel window. It delivers 628 N of push force and 528 N of pull force at 0.5 MPa, fitting perfectly into mid-range pneumatic setups.
This variant includes a SUS304 stainless steel rod for superior corrosion resistance and is equipped with a magnet (-S) for position sensing with CMSE reed or DMSE electronic switches. It uses PT tapered port threads and relies on variable air cushions at both ends to decelerate the load. The rear adjuster acts strictly as a travel stop, meaning it will not hold the load without live air pressure; for true load-holding, consider the SAIL or BSAI series.
Airtac SAIJ40 Adjustable Cylinder SAIJ40BX75-75S Technical Specifications
| Model | Airtac SAIJ40 Adjustable Cylinder SAIJ40BX75-75S |
|---|---|
| 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 SAIJ40BX75-75S
| 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 SAIJ40BX75-75S Is Used
Product Changeovers
Dial in the 0-75 mm travel window during format changes on a packaging line, setting precise end-stops for varying carton sizes without mechanical modifications.
Prototyping Fixtures
Ideal for R&D benches where the exact required stroke is unknown upfront, letting engineers adjust the rear stopper to find the optimal reach during commissioning.
Washdown Handling
The SUS304 stainless steel rod withstands moisture and mild corrosive environments, making it suitable for food or chemical process machine setup.
Is the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX75-75S the Right Cylinder?
Choose this 40 mm bore when your application requires around 628 N of push force at 0.5 MPa, offering a step up from the 32 mm bore (402 N) without the bulk of a 50 mm option. The 75 mm adjustment code is ideal for prototyping or machines handling frequent product changeovers, allowing you to dial in the exact end-stop without swapping cylinders or adding external stops. Because the stroke is relatively short, side-loading is less severe, but the 16 mm rod and M12x1.25 thread still require linear guidance for optimal seal life. Remember that the SAIJ mounting set includes Basic, FA, LB, TC, FTC, TCM1, and TCM2, omitting the FB, CA, CB, and CR options. To match this ISO 15552 cylinder, verify the 40 mm bore, 75 mm stroke, PT ports, and -S magnet.
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 SAIJ40BX75-75S FAQ
At 0.5 MPa operating pressure, this 40 mm bore cylinder provides 628 N of push force and 528 N of pull force. At the maximum 1.0 MPa pressure, it delivers up to 1130 N of push force.
The rear adjuster screw allows you to shorten the effective stroke by up to 75 mm. Because the nominal stroke is 75 mm, you can tune the usable travel window anywhere from 0 to 75 mm to meet your exact positioning needs.
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