Airtac SAIJ80 Adjustable Cylinder SAIJ80BX75-40S
The AirTAC Airtac SAIJ80 Adjustable Cylinder SAIJ80BX75-40S 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 SAIJ80BX75-40S
The AirTAC SAIJ80X75-40-S is a double-acting, single-rod ISO 15552 profile cylinder equipped with a rear stroke adjuster. It delivers a robust 2513N push force at 0.5 MPa and features a 25mm diameter SUS304 stainless steel rod. By turning the rear adjustment screw, you can fine-tune the effective travel window down from the 75mm nominal stroke to a minimum of 35mm, giving you a 35-75mm adjustable range without needing external stops.
This model includes a built-in magnet for electronic DMSE or reed CMSE position sensing, and uses PT tapered ports. The extruded aluminum barrel provides standard ISO 15552 mounting interchangeability, while the rear adjuster acts purely as a travel stop to decelerate the load, not as a lock to hold it without live air.
Airtac SAIJ80 Adjustable Cylinder SAIJ80BX75-40S Technical Specifications
| Model | Airtac SAIJ80 Adjustable Cylinder SAIJ80BX75-40S |
|---|---|
| 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 SAIJ80BX75-40S
| 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 SAIJ80BX75-40S Is Used
Machine Changeover
Dial in the exact end-stop from 35 to 75mm during product size transitions on a packaging line without swapping out the entire cylinder.
End-Position Tuning
Fine-tune the retract position at commissioning to absorb mechanical tolerance variations, using the rear screw rather than adding external shims.
Variable Assembly Stops
Set different stroke lengths on the fly for automated assembly stations that handle multiple part heights or pressing depths.
Is the Airtac SAIJ80 Adjustable Cylinder SAIJ80BX75-40S the Right Cylinder?
Choose this 80mm bore when an application requires high thrust (up to 2513N at 0.5 MPa) but demands flexible end-position tuning during commissioning or product changeover. If you need less force, stepping down to a 63mm bore yields 1559N; if you need more, a 100mm bore provides 3927N. The adjustable stroke is ideal for variable end-stops, whereas a fixed SAI cylinder is better for rigid, unchanging travel limits.
Because the nominal stroke is 75mm, side-load risks are minimal, but the 25mm SUS304 rod still handles lateral forces well. Remember that the rear adjuster and air cushions only set the travel end; for true load-holding without live air pressure, you must use an external rod lock, a pilot-operated check valve, or switch to an AirTAC SAIL or BSAI cylinder. To match this ISO 15552 replacement, specify the 80mm bore, 75mm stroke, 40mm adjustment, PT ports, SUS304 rod, and the -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 SAIJ80 Adjustable Cylinder SAIJ80BX75-40S FAQ
At 0.5 MPa, this 80mm bore cylinder provides 2513N of push force and 2268N of pull force. At the maximum operating pressure of 1.0 MPa, it can deliver up to 513 kgf.
The rear adjuster screw lets you reduce the 75mm nominal stroke by up to 40mm, creating a usable travel window of 35-75mm. The adjuster acts as a mechanical stop to set the retract position and is not a locking mechanism.
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