Airtac SAIJ80 Adjustable Cylinder SAIJ80X240-75
The AirTAC Airtac SAIJ80 Adjustable Cylinder SAIJ80X240-75 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 SAIJ80X240-75
The AirTAC SAIJ80X240-75 is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster that permits on-the-fly end-position tuning. With a nominal 240 mm stroke and a 75 mm adjustment range, it yields a usable travel window of 165 to 240 mm. This bore delivers 2513 N of push force at 0.5 MPa, scaling up to 4523 N at 0.9 MPa, making it well-suited for heavier actuation tasks.
The integrated rear stopper allows you to dial in the exact retract distance during commissioning without swapping out the barrel or adding external stops. The 25 mm carbon steel rod and M20x1.5 thread provide robust resistance to side loads, though an external guide is recommended for long unsupported travel. It supports the reduced SAIJ mounting set (Basic, FA, LB, TC, FTC, TCM1, TCM2) and uses PT tapered ports sized at G3/8.
Airtac SAIJ80 Adjustable Cylinder SAIJ80X240-75 Technical Specifications
| Model | Airtac SAIJ80 Adjustable Cylinder SAIJ80X240-75 |
|---|---|
| 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 SAIJ80X240-75
| 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 SAIJ80X240-75 Is Used
Product Changeovers
Shift the retract position up to 75 mm during format size changes on a conveyor without physically unbolting the cylinder.
Machine Setup Tuning
Fine-tune the 165 to 240 mm travel window during initial commissioning to dial in exact positioning for machining operations.
Adjustable End Stops
Use the rear stopper to vary the effective stroke on automated assembly lines where different product heights require flexible retraction.
Is the Airtac SAIJ80 Adjustable Cylinder SAIJ80X240-75 the Right Cylinder?
Choose this 80 mm bore when your application requires more thrust than a 63 mm bore (which provides 1559 N at 0.5 MPa) but you do not need the full 3927 N of a 100 mm cylinder. The 75 mm adjustment window is ideal for product changeovers on a packaging line, letting you shift the retract end-stop by up to 75 mm without repositioning the cylinder.
Because the rear adjuster acts solely as a travel stop and the air cushions only decelerate the load, this cylinder cannot hold a position without live air pressure. If your setup requires fail-safe load holding, consider the SAIL or BSAI series instead. When replacing an ISO 15552 cylinder, match the 80 mm bore, 240 mm stroke, 75 mm adjustment, PT G3/8 port, and mounting pattern.
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 SAIJ80X240-75 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 acts as a mechanical stop, allowing you to shorten the 240 mm nominal stroke by up to 75 mm. This creates an adjustable travel window from 165 to 240 mm without needing external stops.
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