Airtac SAIJ80 Adjustable Cylinder SAIJ80X300-20S
The AirTAC Airtac SAIJ80 Adjustable Cylinder SAIJ80X300-20S 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 SAIJ80X300-20S
The AirTAC SAIJ80X300-20-S is a double-acting, single-rod ISO 15552 profile cylinder equipped with a rear stroke adjuster. It delivers 2513 N of push force at 0.5 MPa and features a 300 mm nominal stroke that can be fine-tuned down by up to 20 mm, creating a precise 280-300 mm usable travel window. This built-in adjustability allows you to dial in the retract end position during commissioning without swapping hardware.
This variant includes a magnet for position sensing with CMSE reed and DMSE electronic switches, utilizing the dual sensor grooves machined into the extruded aluminum barrel. It uses a PT tapered port and a 25 mm carbon steel rod with an M20x1.5 thread. The rear adjuster acts strictly as a travel stop for end-position tuning, not a load-holding lock.
Airtac SAIJ80 Adjustable Cylinder SAIJ80X300-20S Technical Specifications
| Model | Airtac SAIJ80 Adjustable Cylinder SAIJ80X300-20S |
|---|---|
| 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 SAIJ80X300-20S
| 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 SAIJ80X300-20S Is Used
Machine Changeover
Fine-tune the 280-300 mm retract window during product size changeovers without adding external mechanical stops.
End-Position Calibration
Dial in the exact end-of-stroke position during commissioning to perfect the 2513 N push force contact point.
Variable Diverter Stops
Adjust the stroke on the fly for conveyor diverters handling different package sizes using CMSE/DMSE sensors.
Is the Airtac SAIJ80 Adjustable Cylinder SAIJ80X300-20S the Right Cylinder?
Choose this 80 mm bore when you need 2513 N push force at 0.5 MPa, stepping up from a 63 mm bore (1559 N) or down from a 100 mm bore (3927 N). The adjustable stroke is selected over a fixed SAI cylinder when a machine requires variable end-stops or product-size changeovers, letting you trim the 300 mm stroke back to 280 mm on the fly. Because the nominal stroke is 300 mm, the 25 mm rod and M20x1.5 thread will still experience leverage forces; an external guide is recommended to prevent excessive side-loading on the piston.
For a direct ISO 15552 replacement match, confirm the 80 mm bore, 300 mm stroke, 20 mm adjustment, PT port thread, and the -S magnet option. Remember that a plain SAIJ does not hold its load without live air. If your application requires true load-holding without pneumatic pressure, consider an AirTAC SAIL pneumatic lock, a BSAI clamp-lock cylinder, or an external pilot-operated check valve.
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 SAIJ80X300-20S 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 0.7 MPa, the push force increases to 3518 N.
The rear adjuster screw lets you shorten the 300 mm nominal stroke by up to 20 mm, providing a usable travel window of 280-300 mm. It functions as a mechanical stop for position tuning and does not lock the load without live air pressure.
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