Airtac SAIJ40 Adjustable Cylinder SAIJ40BX75-50S
The AirTAC SAIJ40 Adjustable Cylinder SAIJ40BX75-50S 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 interchangeable with other ISO 15552 cylinders at the mounting interface.
- 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 SAIJ40BX75-50S
The AirTAC SAIJ40X75-50-S is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster, providing a usable travel window of 25 to 75 mm. The PT tapered port threads ensure a robust, leak-free pneumatic connection.
Because the adjuster acts purely as a mechanical stop on the retract end, it allows for rapid end-position tuning during commissioning without swapping cylinders or adding external stops. Note that this adjuster is not a locking device; the cylinder cannot hold a load without live air pressure, requiring a SAIL or BSAI variant for true load-holding applications.
Airtac SAIJ40 Adjustable Cylinder SAIJ40BX75-50S Technical Specifications
| Model | Airtac SAIJ40 Adjustable Cylinder SAIJ40BX75-50S |
|---|---|
| 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 | 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 SAIJ40BX75-50S
| 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 SAIJ40BX75-50S Is Used
Product Changeovers
Dial in the exact end-stop for different product lengths on a packaging line without changing the cylinder, utilizing the 25-75 mm travel window.
Commissioning Calibration
Fine-tune the retract position during machine setup to achieve precise alignment, avoiding the need to bolt on external physical stops.
Corrosive Environments
Leverage the SUS304 stainless steel rod for light-duty positioning tasks in environments where standard carbon steel rods would degrade.
Is the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX75-50S the Right Cylinder?
The generous 50 mm adjustment range on a 75 mm stroke is perfect for machines processing varying product sizes, enabling rapid changeovers. For load-holding without live pressure, select a SAIL or BSAI model instead.
To match this ISO 15552 interchangeable cylinder exactly, specify: 40 mm bore, 75 mm stroke, 50 mm adjustment, PT port threads, SUS304 (B) rod material, and the -S magnet option. It supports a reduced mounting set of 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 SAIJ40BX75-50S FAQ
The rear mechanical stopper allows you to shorten the effective stroke by up to 50 mm. This creates a usable travel window of 25 to 75 mm, enabling precise end-position tuning without altering the cylinder mounting.
At 0.7 MPa, the push force increases to 879 N.
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1-Year Warranty
Covers non-human-caused product damage.
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Standard models are processed and dispatched in 3-5 business days.
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Most inquiries answered within 7-8 hours.
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