Airtac SAIJ80 Adjustable Cylinder SAIJ80X300-20
The AirTAC Airtac SAIJ80 Adjustable Cylinder SAIJ80X300-20 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø80mm bore and 300mm 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
- Stroke300 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- CushionAdjustable, 36 mm
About the Airtac SAIJ80 Adjustable Cylinder SAIJ80X300-20
The AirTAC SAIJ80X300-20 is a double-acting ISO 15552 profile cylinder featuring a rear-mounted stroke adjuster. It provides a nominal 300 mm stroke that can be dialed back by up to 20 mm, creating a precise 280-300 mm usable travel window for fine-tuning end positions during commissioning. Delivering 2513 N of push force at 0.5 MPa, it handles demanding actuation tasks without requiring external stops.
This extruded aluminum profile cylinder includes variable air cushions at both ends to manage deceleration. It features a 25 mm carbon steel piston rod with an M20x1.5 thread, sized to handle greater side loads, though a 300 mm stroke still requires an external guide for unsupported loads. The PT tapered port is G3/8, and the body supports sensor grooves on both sides for CMSE or DMSE switches if a magnet is added later.
Airtac SAIJ80 Adjustable Cylinder SAIJ80X300-20 Technical Specifications
| Model | Airtac SAIJ80 Adjustable Cylinder SAIJ80X300-20 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø80 mm |
| Stroke | 300 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 SAIJ80X300-20
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 80 | Bore size in mm. |
| ×300 | 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 SAIJ80X300-20 Is Used
Product Changeover
Quickly dial in the 280-300 mm travel window during format changes on packaging lines without physically swapping cylinders or adding mechanical shims.
End-Position Tuning
Fine-tune the retract end-stop during machine commissioning to achieve exact positioning of heavy 2513 N loads, avoiding the need for external stopper blocks.
Assembly Pressing
Apply precise adjustable force for pressing operations, using the rear stopper to set exact travel limits while relying on air cushions for smooth deceleration.
Is the Airtac SAIJ80 Adjustable Cylinder SAIJ80X300-20 the Right Cylinder?
Select this 80 mm bore cylinder when an application requires substantial thrust—stepping down to a 63 mm bore yields 1559 N at 0.5 MPa, while this 80 mm model provides 2513 N. The adjustable stroke is chosen over a fixed SAI cylinder when you need variable end-stops for product changeovers or exact positioning without swapping hardware. Note that the rear adjuster acts only as a travel stop; it does not hold the load without live air. For load-holding requirements, consider an external rod lock or the AirTAC SAIL series.
When replacing an ISO 15552 cylinder, match the 80 mm bore, 300 mm nominal stroke, 20 mm adjustment range, G3/8 PT port, and mounting style. The SAIJ supports a specific mounting subset: Basic, FA, LB, TC, FTC, TCM1, and TCM2. Because the stroke is 300 mm, ensure adequate external guiding to prevent excessive rod side-loading and premature seal wear.
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 SAIJ80X300-20 FAQ
At 0.5 MPa operating pressure, this 80 mm bore cylinder provides 2513 N of push force and 2268 N of pull force. At the maximum 1.0 MPa pressure, it delivers up to 513 kgf.
The rear adjuster screw allows you to shorten the effective stroke by up to 20 mm, providing a usable travel window of 280-300 mm. It functions as a mechanical stop to fine-tune the end position and does not lock the load without continuous air pressure.
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