Airtac SAIJ80 Adjustable Cylinder SAIJ80BX75-40
The AirTAC Airtac SAIJ80 Adjustable Cylinder SAIJ80BX75-40 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø80mm bore and 75mm stroke, G3/8 air ports and adjustable end cushioning. Its standardized mounting interface makes it a drop-in replacement for other ISO 15552 cylinders in automation lines.
- BoreØ80 mm
- Stroke75 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- CushionAdjustable, 36 mm
About the Airtac SAIJ80 Adjustable Cylinder SAIJ80BX75-40
The AirTAC SAIJ80X75-40 is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster that trims the effective travel. With a 75 mm nominal stroke and a 40 mm adjustment code, it provides a usable 35-75 mm travel window for fine end-position tuning at commissioning. It delivers 2513 N of push force at 0.5 MPa, scaling up to 4523 N at 0.9 MPa, making it suited for heavier positioning tasks.
This unit uses a SUS304 stainless steel rod for corrosion resistance and features a PT tapered port. The extruded aluminum barrel includes sensor grooves on both sides, though this SKU omits the internal magnet, so external proximity sensing is required. The rear adjuster acts purely as a mechanical stop to set the retract position, not as a lock, meaning it will not hold a load without live air pressure.
Airtac SAIJ80 Adjustable Cylinder SAIJ80BX75-40 Technical Specifications
| Model | Airtac SAIJ80 Adjustable Cylinder SAIJ80BX75-40 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø80 mm |
| Stroke | 75 mm |
| Acting type | Double acting |
| Port size | G3/8 |
| Rod thread | M20×1.5 |
| 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, 36 mm |
| Max stroke | Up to 1500 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 (Ø80mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 2513 N | 2268 N |
| 0.7 MPa | 3519 N | — |
| Max (@1.0 MPa) | 513 kgf | |
Actual usable force is lower than theoretical due to friction and back-pressure. Size with a safety margin.
Model Code: Airtac SAIJ80 Adjustable Cylinder SAIJ80BX75-40
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 80 | 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 SAIJ80 Adjustable Cylinder SAIJ80BX75-40 Is Used
Variable End-Stop Machining
Dial in the exact 35-75 mm retract position during machine setup to accommodate different part lengths without changing the cylinder.
Product Changeover Diverter
Quickly tune the stroke length on a packaging line diverter when switching between box sizes, using the rear screw to set the new end point.
Assembly Press Tuning
Leverage the 2513 N push force at 0.5 MPa to seat components, adjusting the travel window on the fly to prevent over-travel during delicate pressing.
Is the Airtac SAIJ80 Adjustable Cylinder SAIJ80BX75-40 the Right Cylinder?
Choose this 80 mm bore when the 50 mm class (982 N push at 0.5 MPa) is insufficient but the 100 mm class (3927 N) is oversized. An adjustable stroke is selected over a fixed SAI when a machine requires variable end-stops to handle minor product size changes without physically swapping cylinders. For load-holding without continuous air pressure, this plain SAIJ is insufficient; instead, specify a SAIL (air-released lock) or BSAI (clamp-lock) cylinder.
To match this ISO 15552 interchangeable cylinder for a replacement, verify the 80 mm bore, 75 mm stroke, 40 mm adjustment range, PT G3/8 port, and the absence of a magnet. The mounting interface accepts Basic, FA, LB, TC, FTC, TCM1, or TCM2 accessories, deliberately omitting the FB, CA, CB, and CR styles. The 25 mm rod and M20x1.5 thread provide robust side-load resistance, though any application approaching the 75 mm travel limit should still use an external guide rail.
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 SAIJ80 Adjustable Cylinder SAIJ80BX75-40 FAQ
At 0.5 MPa it provides 2513 N of push force and 2268 N of pull force. At 0.9 MPa, the push force increases to 4523 N.
The rear adjuster screw lets you shorten the 75 mm nominal stroke by up to 40 mm, creating a 35-75 mm usable travel window. It functions as a mechanical stop for end-position tuning and does not lock the load.
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