Airtac SAIJ80 Adjustable Cylinder SAIJ80X240-20
The AirTAC Airtac SAIJ80 Adjustable Cylinder SAIJ80X240-20 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 SAIJ80X240-20
The AirTAC SAIJ80X240-20 is a double-acting, single-rod ISO 15552 profile cylinder featuring a rear-mounted stroke adjuster. It delivers a robust 2513N push force at 0.5 MPa and utilizes a PT-tapered G3/8 port. By turning the rear screw, you achieve a 220-240mm usable travel window, perfect for fine-tuning the retract end position during commissioning.
This extruded aluminum profile cylinder includes variable air cushions at both ends to decelerate the load smoothly. The adjuster functions strictly as a mechanical stop and does not hold the load without live air pressure. 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 SAIJ80X240-20 Technical Specifications
| Model | Airtac SAIJ80 Adjustable Cylinder SAIJ80X240-20 |
|---|---|
| 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 SAIJ80X240-20
| 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 SAIJ80X240-20 Is Used
Machine Changeover
Quickly adapt the retract end position within the 220-240mm window when switching product sizes on a packaging line.
End-Position Tuning
Fine-tune the exact stopping point during commissioning without machining external stopper blocks.
Assembly Pressing
Leverage the 2513N push force at 0.5 MPa for pressing tasks while trimming the stroke to prevent over-travel.
Is the Airtac SAIJ80 Adjustable Cylinder SAIJ80X240-20 the Right Cylinder?
Choose this 80mm bore when a 50mm bore (982N push at 0.5 MPa) lacks thrust but a 100mm bore (3927N) is excessive. The 20mm adjustment window is ideal for product changeovers, letting you dial in the exact end-stop without swapping the cylinder. If your machine requires true load-holding without continuous air, select the SAIL or BSAI series instead, as the SAIJ adjuster is not a lock.
For this 240mm stroke, the 25mm carbon steel rod and M20x1.5 thread handle moderate side loads, but an external guide is recommended for heavy off-center loads. To replace an ISO 15552 cylinder, match the 80mm bore, 240mm stroke, 20mm adjust, PT port, and desired mounting. Sensors require the -S magnet option to fit the dual-side sensor grooves.
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 SAIJ80X240-20 FAQ
At 0.5 MPa operating pressure, this 80mm bore cylinder provides 2513N of push force and 2268N of pull force. At 0.7 MPa, the push force increases to 3518N.
A rear screw acts as a mechanical stop, allowing you to shorten the effective travel from the 240mm nominal stroke down to 220mm. It sets the end position but does not lock the load without live air.
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