Airtac SAIJ80 Adjustable Cylinder SAIJ80AX240-50
The AirTAC Airtac SAIJ80 Adjustable Cylinder SAIJ80AX240-50 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 SAIJ80AX240-50
The AirTAC SAIJ80X240-50 is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster that permits fine-tuning of the retract end position. It provides a usable travel window of 190-240 mm, allowing you to dial back the nominal 240 mm stroke by up to 50 mm during commissioning. This eliminates the need to swap the cylinder or bolt on external stops when finalizing machine positions.
Delivering a robust push force of 3518 N at 0.7 MPa, this 80 mm bore unit is built with a SUS420J2 stainless steel rod for enhanced durability. The extruded aluminum barrel includes sensor grooves on both sides, and the mounting options cover a specific subset of Basic, FA, LB, TC, FTC, TCM1, and TCM2.
Airtac SAIJ80 Adjustable Cylinder SAIJ80AX240-50 Technical Specifications
| Model | Airtac SAIJ80 Adjustable Cylinder SAIJ80AX240-50 |
|---|---|
| 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 SAIJ80AX240-50
| 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 SAIJ80AX240-50 Is Used
Machine Changeover
Quickly dial in the 190-240 mm travel window during product size changes without replacing the cylinder or adding external stopper blocks.
End-Stop Tuning
Fine-tune the retract position at commissioning to perfect a 3518 N press or clamping operation without mechanical rework.
Variable Positioning
Adjust the rear stopper screw to vary the end position for flexible manufacturing lines that run multiple product lengths.
Is the Airtac SAIJ80 Adjustable Cylinder SAIJ80AX240-50 the Right Cylinder?
Choose this 80 mm bore cylinder when your application requires substantial thrust but demands flexibility in the final end-stop position. If you need less force, stepping down to a 63 mm bore yields 2182 N at 0.7 MPa; if you require more, a 100 mm bore provides 5497 N. The adjustable stroke is ideal for product changeovers on a line, whereas a fixed-stroke SAI cylinder is better for rigid, never-changing setups.
To match this ISO 15552 replacement, specify an 80 mm bore, 240 mm stroke, 50 mm adjustment, PT tapered port threads, and your chosen mounting. Note that the rear adjuster acts only as a travel stop and does not hold the load without live air; for true load-holding, consider the SAIL or BSAI series. Because the stroke is under 300 mm, side-load risks are moderate, but the 25 mm rod and M20x1.5 thread handle standard loads effectively.
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 SAIJ80AX240-50 FAQ
At 0.7 MPa operating pressure, the 80 mm bore 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 the 240 mm nominal stroke down to 190 mm. It acts as a mechanical stop to tune the end position, but it is not a lock and will not hold the load without live air pressure.
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