Airtac SAIJ80 Adjustable Cylinder SAIJ80X240-40
The AirTAC Airtac SAIJ80 Adjustable Cylinder SAIJ80X240-40 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø80mm bore and 240mm 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
- Stroke240 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- CushionAdjustable, 36 mm
About the Airtac SAIJ80 Adjustable Cylinder SAIJ80X240-40
The AirTAC SAIJ80X240-40 is a double-acting ISO 15552 profile cylinder featuring a rear-mounted stroke adjuster. It provides a usable travel window of 200 to 240 mm, allowing you to dial back the nominal stroke by up to 40 mm during commissioning. Delivering a push force of 3518 N at 0.7 MPa, it fits robust actuation needs perfectly.
This model uses a G3/8 PT tapered port and a 25 mm carbon steel rod with an M20x1.5 thread, offering high side-load resilience. The extruded aluminum barrel includes sensor grooves on both sides for CMSE reed or DMSE electronic switches. It supports a reduced mounting set of Basic, FA, LB, TC, FTC, TCM1, and TCM2, omitting FB, CA, CB, and CR.
Airtac SAIJ80 Adjustable Cylinder SAIJ80X240-40 Technical Specifications
| Model | Airtac SAIJ80 Adjustable Cylinder SAIJ80X240-40 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø80 mm |
| Stroke | 240 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 SAIJ80X240-40
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 80 | Bore size in mm. |
| ×240 | 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 SAIJ80X240-40 Is Used
Product Changeover
Dial in the exact 200 to 240 mm retract position on packaging lines when switching to a new container size, eliminating the need to physically swap cylinders.
End-Stop Tuning
Fine-tune the final end-position during machine commissioning to perfect a pressing or forming operation without adding external mechanical stops.
Variable Diverter Arm
Adjust the stroke length on a conveyor sorting arm to accommodate different package depths on the fly, ensuring accurate routing.
Is the Airtac SAIJ80 Adjustable Cylinder SAIJ80X240-40 the Right Cylinder?
Choose this 80 mm bore when a 63 mm bore (2182 N push at 0.5 MPa) is insufficient, or step down to a 63 mm cylinder if your load requires less than 1559 N. The 40 mm adjustable stopper is ideal for product-size changeovers, letting you fine-tune the retract end-position without swapping the cylinder or adding external stops. Since the 240 mm stroke is below the 300 mm side-load threshold, standard mounting is usually sufficient, though long unsupported loads still need a guide.
The rear adjuster acts purely as a travel stop and cannot hold a load without live air pressure. For true fail-safe load holding, select the SAIL (air-released lock) or BSAI (clamp-lock) series instead. To match this ISO 15552 footprint exactly, specify an 80 mm bore, 240 mm stroke, 40 mm adjustment, G3/8 PT port, and your required mounting accessory.
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 SAIJ80X240-40 FAQ
At a 0.7 MPa operating pressure, this 80 mm bore cylinder provides a push force of 3518 N and a pull force of 2268 N. At 0.5 MPa, it delivers 2513 N push and 2268 N pull.
The rear adjuster screw lets you shorten the effective travel from 240 mm down to 200 mm. It functions as a mechanical stop to set the retract position precisely, but it is not a lock and requires live air pressure to hold the load.
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