Airtac SAIJ80 Adjustable Cylinder SAIJ80X140-75
The AirTAC Airtac SAIJ80 Adjustable Cylinder SAIJ80X140-75 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø80mm bore and 140mm 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
- Stroke140 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- CushionAdjustable, 36 mm
About the Airtac SAIJ80 Adjustable Cylinder SAIJ80X140-75
The AirTAC SAIJ80X140-75 is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster that allows you to fine-tune the effective travel anywhere within a 65-140 mm window. By simply turning the external stopper screw during commissioning, you can establish a new end position without bolting on external stops or physically swapping the cylinder. Delivering a robust 2513 N of push force and 2268 N of pull force at 0.5 MPa, it provides substantial thrust for heavy positioning tasks.
This 80 mm bore unit uses a G3/8 port and a 25 mm carbon steel rod with an M20x1.5 thread, offering excellent rigidity and side-load resistance for industrial assembly. It features adjustable air cushions at both ends to manage kinetic energy, and the extruded aluminum barrel includes sensor grooves on both sides for flexible switch placement. Mounting options include Basic, FA, LB, TC, FTC, TCM1, and TCM2.
Airtac SAIJ80 Adjustable Cylinder SAIJ80X140-75 Technical Specifications
| Model | Airtac SAIJ80 Adjustable Cylinder SAIJ80X140-75 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø80 mm |
| Stroke | 140 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 SAIJ80X140-75
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 80 | Bore size in mm. |
| ×140 | 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 SAIJ80X140-75 Is Used
Product Size Changeovers
Rapidly dial the stroke back from 140 mm to 65 mm when switching the production line to a smaller product format, eliminating the need to physically remount cylinders or add external spacers.
End-Position Tuning
Fine-tune the retract end-stop during machine commissioning to perfectly align heavy clamping or pressing forces without disassembling the pneumatic circuit.
Heavy Assembly Pressing
Leverage the 2513 N push force at 0.5 MPa to seat large bearings or form components, using the adjustable stop to precisely control the pressing depth.
Is the Airtac SAIJ80 Adjustable Cylinder SAIJ80X140-75 the Right Cylinder?
Choose this 80 mm bore when your application requires high thrust between the 50 mm bore (982 N push at 0.5 MPa) and the 100 mm bore (3927 N push). The massive 75 mm adjustment range on this 140 mm stroke cylinder is ideal for machines that process multiple product sizes on a single line, allowing operators to dial in the exact end-stop rapidly during changeover. Because the 140 mm stroke is below the 300 mm threshold, side-load risks are moderate, though the 25 mm rod still handles off-center loads well.
When matching this cylinder for an ISO 15552 interchange, verify the 80 mm bore, 140 mm stroke, 75 mm adjustment, G3/8 PT tapered ports, and standard carbon steel rod. Note that the rear adjuster is strictly a travel stop that decelerates the piston; it does not hold the load without live air. For true fail-safe load holding, consider an AirTAC SAIL or BSAI cylinder instead.
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 SAIJ80X140-75 FAQ
The rear adjuster acts as an external mechanical stop that limits the piston's inward travel. For this model, you can trim the effective stroke by up to 75 mm, creating a usable travel window between 65 mm and 140 mm. It is a travel stop, not a lock, so it will not hold the load if air pressure is removed.
At 0.5 MPa, the SAIJ80X140-75 generates 2513 N of push force and 2268 N of pull force. The standard speed range for this 80 mm bore size is 30-800 mm/s, which can be regulated via the G3/8 port airflow.
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