Airtac SAIJ40 Adjustable Cylinder SAIJ40BX80-75
The AirTAC Airtac SAIJ40 Adjustable Cylinder SAIJ40BX80-75 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø40mm bore and 80mm 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
- Stroke80 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM12×1.25
- CushionAdjustable, 30 mm
About the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX80-75
The AirTAC SAIJ40X80-75 is a double-acting ISO 15552 profile cylinder featuring a rear-mounted stroke adjuster. It provides a nominal 80 mm stroke that can be dialed back by up to 75 mm, yielding a highly flexible 5 to 80 mm usable travel window for exact end-position tuning. Equipped with a SUS304 stainless steel rod, it delivers 628 N of push force at 0.5 MPa and operates at speeds between 30 and 800 mm/s.
This model uses PT tapered port threads (G1/4) and excludes a magnet. The rear screw acts purely as a mechanical stop to fine-tune deceleration and position without swapping components. It is dimensionally interchangeable per ISO 15552 and supports a specific mounting subset including Basic, FA, LB, TC, FTC, TCM1, and TCM2.
Airtac SAIJ40 Adjustable Cylinder SAIJ40BX80-75 Technical Specifications
| Model | Airtac SAIJ40 Adjustable Cylinder SAIJ40BX80-75 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø40 mm |
| Stroke | 80 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 SAIJ40BX80-75
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×80 | 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 SAIJ40BX80-75 Is Used
Product Size Changeovers
Dial in the exact end-stop for varying package lengths on a packaging line without physically swapping the cylinder or adding external shims.
End-Position Calibration
Fine-tune the retract position during machine commissioning to achieve precise alignment, utilizing the wide 5 to 80 mm travel window.
Variable End Stops
Provide a mechanical stop for delicate operations where the effective stroke needs to be repeatedly adjusted between production runs.
Is the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX80-75 the Right Cylinder?
Choose this 40 mm bore when an application demands extreme variability over a short travel distance, as the 75 mm adjustment range allows a single cylinder to handle multiple product sizes. If you need less adjustability but higher force, stepping up to a 63 mm bore yields 1559 N of push force at 0.5 MPa. Conversely, dropping to a 32 mm bore reduces the footprint and force to 402 N.
Because the stroke is under 300 mm, side-load stress on the 16 mm rod is minimal, though external guides are still recommended for heavy lateral loads. Remember that the rear adjuster is a travel stop, not a lock; the SAIJ40X80-75 cannot hold a load without live air pressure. For positive load-holding, consider an external pilot-operated check valve or the SAIL lock cylinder series. To replace an existing unit, match the 40 mm bore, 80 mm stroke, PT port, and desired mounting hardware.
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 SAIJ40BX80-75 FAQ
At an operating pressure of 0.5 MPa, this 40 mm bore cylinder provides 628 N of push force and 528 N of pull force. At 0.7 MPa, the push force increases to 879 N.
The rear adjuster screw allows you to shorten the 80 mm nominal stroke by up to 75 mm, creating a usable travel window of 5 to 80 mm. The adjuster acts as a mechanical stop to set the retract end position and does not lock the load without air pressure.
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