Airtac SAIJ80 Adjustable Cylinder SAIJ80X240-50
The AirTAC Airtac SAIJ80 Adjustable Cylinder SAIJ80X240-50 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 SAIJ80X240-50
The AirTAC SAIJ80X240-50 is a double-acting, single-rod ISO 15552 profile cylinder featuring a rear-mounted stroke adjuster. It provides a usable travel window of 190 to 240 mm, enabling precise end-position tuning at commissioning without swapping out the unit. Delivering a robust 4523N of push force at 0.9 MPa, it is built to handle demanding industrial motion control.
The extruded aluminum barrel incorporates sensor grooves on both sides for direct mounting of CMSE or DMSE switches. A 25mm carbon steel rod with an M20x1.5 thread provides high side-load resistance, while the G3/8 port ensures rapid airflow for speeds up to 800 mm/s. The rear adjuster acts purely as a mechanical stop to set the retract end position and must not be confused with a locking device.
Airtac SAIJ80 Adjustable Cylinder SAIJ80X240-50 Technical Specifications
| Model | Airtac SAIJ80 Adjustable Cylinder SAIJ80X240-50 |
|---|---|
| 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 SAIJ80X240-50
| 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 SAIJ80X240-50 Is Used
Machine Changeover
Dial in the 190-240mm travel window during product size transitions to set new retract endpoints rapidly without changing hardware.
End-Position Trimming
Fine-tune the final retract position during commissioning to perfect alignment and eliminate the need for external stopper blocks.
Variable Assembly Stops
Adjust the stroke on automated lines to accommodate different part lengths, using the rear screw to set the exact clamping distance.
Is the Airtac SAIJ80 Adjustable Cylinder SAIJ80X240-50 the Right Cylinder?
Choose this 80mm bore when a 50mm bore falls short on power, as the smaller version only yields 1767N of push force at 0.9 MPa. The SAIJ80X240-50 is selected over a fixed-stroke SAI cylinder when a machine requires variable end-stops to accommodate product changeovers or fine-tune positioning without adding external physical stops. If your application must hold a load securely without live air pressure, this cylinder will not suffice; instead, consider the SAIL series with an air-released lock or the BSAI clamp-lock variant.
To replace this unit with an equivalent ISO 15552 cylinder, match the 80mm bore, 240mm stroke, 50mm adjustment range, PT tapered port thread, and the SAIJ mounting set (Basic, FA, LB, TC, FTC, TCM1, TCM2). Note that FB, CA, CB, and CR mounts are omitted from this adjustable series. Because the 240mm stroke is under the 300mm threshold, side-load stress is manageable, though an external guide is still recommended for heavy lateral loads.
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 SAIJ80X240-50 FAQ
The rear adjuster screw allows you to shorten the nominal 240mm stroke by up to 50mm, creating a usable travel window of 190 to 240mm. It functions as a mechanical stop that sets the end position; it does not lock the load or hold position without live air pressure.
At an operating pressure of 0.9 MPa, this 80mm bore cylinder generates 4523N of push force and 4071N of pull force. It can deliver a maximum force of 513 kgf at 1.0 MPa.
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