Airtac SAIJ80 Adjustable Cylinder SAIJ80X275-40
The AirTAC Airtac SAIJ80 Adjustable Cylinder SAIJ80X275-40 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø80mm bore and 275mm 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
- Stroke275 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- CushionAdjustable, 36 mm
About the Airtac SAIJ80 Adjustable Cylinder SAIJ80X275-40
The AirTAC SAIJ80X275-40 is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster that permits up to 40mm of end-position trimming. This yields a usable travel window spanning 235 to 275mm, enabling precise calibration at commissioning without the need to physically swap the actuator. It delivers 2513N of push force and 2268N of pull force at 0.5 MPa, matching the robust thrust class expected of an 80mm bore.
The extruded aluminum barrel incorporates sensor grooves on both sides for straightforward position feedback integration. A standard carbon steel rod with an M20x1.5 thread provides substantial surface area for coupling, though long unsupported strokes still necessitate an external guide to prevent excessive side-loading. The rear stopper solely dictates the travel endpoint and must not be confused with a locking mechanism, as the cylinder cannot hold loads without continuous live air pressure.
Airtac SAIJ80 Adjustable Cylinder SAIJ80X275-40 Technical Specifications
| Model | Airtac SAIJ80 Adjustable Cylinder SAIJ80X275-40 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø80 mm |
| Stroke | 275 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 SAIJ80X275-40
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 80 | Bore size in mm. |
| ×275 | 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 SAIJ80X275-40 Is Used
Changeover Calibration
Dial in the 235-275mm travel window during machine setup to accommodate new product dimensions without replacing the cylinder.
Variable End-Stop Positioning
Adjust the retract endpoint on the fly for sorting diverter arms that must handle varying package lengths on a single line.
Assembly Press Tuning
Fine-tune the 2513N clamping stroke during commissioning to guarantee precise seating of components without over-travel.
Is the Airtac SAIJ80 Adjustable Cylinder SAIJ80X275-40 the Right Cylinder?
Selecting this 80mm bore actuator provides 2513N of thrust at 0.5 MPa, offering a notable step up from the 63mm bore's 1559N while avoiding the higher air consumption of a 100mm cylinder. The integrated 40mm adjustment screw is ideal for production lines requiring frequent product-size changeovers, allowing operators to dial in the exact end-stop on the fly rather than fabricating external mechanical stops. When specifying the ISO 15552 replacement parameters, confirm the 275mm stroke, 40mm adjustment range, G3/8 PT ports, and the specific mounting accessory set (Basic, FA, LB, TC, FTC, TCM1, or TCM2). Because the total stroke reaches 275mm, ensure the load is guided externally to protect the M20x1.5 rod from bending moments. This standard configuration lacks a magnet, so position sensing would require external reed or solid-state switches mounted to the barrel grooves if needed later.
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 SAIJ80X275-40 FAQ
At an operating pressure of 0.5 MPa, this 80mm bore cylinder generates 2513N of push force and 2268N of pull force. At the maximum rated pressure of 1.0 MPa, it can deliver up to 513 kgf.
The rear adjuster screw acts as a mechanical stop that lets you shorten the effective stroke by up to 40mm, creating a usable travel window of 235 to 275mm. It only sets the travel endpoint and does not lock or hold the load without continuous air pressure.
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