Airtac SAIJ80 Adjustable Cylinder SAIJ80X180-40
The AirTAC Airtac SAIJ80 Adjustable Cylinder SAIJ80X180-40 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø80mm bore and 180mm 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
- Stroke180 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- CushionAdjustable, 36 mm
About the Airtac SAIJ80 Adjustable Cylinder SAIJ80X180-40
The AirTAC SAIJ80X180-40 is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster that permits fine-tuning the effective travel down from the 180mm nominal stroke. This creates a usable 140-180mm end-position window, allowing you to dial in the exact retract distance during commissioning without adding external mechanical stops. The extruded aluminum barrel includes sensor grooves on both sides for flexible mounting of CMSE or DMSE switches.
Operating at 0.5 MPa, this 80mm bore generates 2513N of push thrust and 2268N of pull thrust, making it well-suited for heavier handling tasks. It features a G3/8 port and a robust 25mm carbon steel rod with an M20x1.5 thread, which provides excellent resistance to side loads. The mounting interface supports Basic, FA, LB, TC, FTC, TCM1, and TCM2 attachments, deliberately omitting the FB, CA, CB, and CR options found on some fixed-stroke variants.
Airtac SAIJ80 Adjustable Cylinder SAIJ80X180-40 Technical Specifications
| Model | Airtac SAIJ80 Adjustable Cylinder SAIJ80X180-40 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø80 mm |
| Stroke | 180 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 SAIJ80X180-40
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 80 | Bore size in mm. |
| ×180 | 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 SAIJ80X180-40 Is Used
Machine Changeover Setup
Dial in the 140-180mm travel window during product family changeovers to set new retract endpoints without physically swapping the cylinder or adding external shims.
Heavy Payload Positioning
Leverage the 2513N push force at 0.5 MPa to move heavy jigs into exact working positions, using the rear stopper to absorb final mechanical limits.
Assembly Press Tuning
Adjust the effective stroke on the fly to perfect the pressing distance of components, ensuring precise seating without over-travel.
Is the Airtac SAIJ80 Adjustable Cylinder SAIJ80X180-40 the Right Cylinder?
Select this 80mm bore model when your application requires substantial force—such as the 2513N push thrust at 0.5 MPa—but also demands precise end-position variability. If your setup only needs lighter actuation, stepping down to a 63mm bore offers 1559N of push force, saving space and air consumption. Conversely, moving up to a 100mm bore yields 3927N for heavier payloads.
The SAIJ80X180-40 is chosen over a fixed SAI cylinder when you need to accommodate product size changeovers or fine-tune a machine setup without physically swapping the actuator. Remember that the rear adjuster is a travel stop, not a locking device; it cannot hold a load without live air pressure. For true drop-out protection, consider an external pilot-operated check valve or the AirTAC SAIL or BSAI locking cylinder series. When specifying a drop-in replacement, confirm the 180mm stroke, 40mm adjustment range, PT port threads, and the correct mounting subset.
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 SAIJ80X180-40 FAQ
At a 0.5 MPa operating pressure, this 80mm bore cylinder provides 2513N of push force and 2268N of pull force. At the maximum 1.0 MPa pressure, it can deliver up to 4523N of push force.
The rear adjuster screw allows you to shorten the 180mm nominal stroke by up to 40mm, creating a usable travel window of 140-180mm. This stopper only limits the retract end-position and does not lock the load without live air pressure.
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