Airtac SAIJ80 Adjustable Cylinder SAIJ80X25-20S
The AirTAC Airtac SAIJ80 Adjustable Cylinder SAIJ80X25-20S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø80mm bore and 25mm 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
- Stroke25 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- CushionAdjustable, 36 mm
About the Airtac SAIJ80 Adjustable Cylinder SAIJ80X25-20S
The AirTAC SAIJ80X25-20-S is a double-acting, single-rod ISO 15552 profile cylinder featuring a rear stroke adjuster. It provides a 2513N push force at 0.5 MPa and utilizes a carbon steel piston rod with an M20x1.5 thread. Because it carries the -20 adjustment code, you can dial back the nominal 25mm stroke to fine-tune the exact end position, creating a highly precise 5-25mm usable travel window without adding external stops.
This adjustable design is ideal for machine setups requiring variable end-stops during product changeovers. The extruded aluminum barrel features sensor grooves on both sides, and the integrated -S magnet enables position detection with AirTAC CMSE reed or DMSE solid-state sensors. It supports a reduced mounting set (Basic, FA, LB, TC, FTC, TCM1, TCM2) and uses PT tapered port threads (G3/8).
Airtac SAIJ80 Adjustable Cylinder SAIJ80X25-20S Technical Specifications
| Model | Airtac SAIJ80 Adjustable Cylinder SAIJ80X25-20S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø80 mm |
| Stroke | 25 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 SAIJ80X25-20S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 80 | Bore size in mm. |
| ×25 | 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 SAIJ80X25-20S Is Used
Product Changeovers
Leverage the 5-25mm travel window to quickly set new end-stops during machine format changes without physically swapping the cylinder.
Commissioning Calibration
Use the rear adjusting screw to precisely dial in the exact retract position during initial machine setup, absorbing minor mechanical tolerances.
Short-Stroke Pressing
Apply the 2513N push force at 0.5 MPa for heavy-duty clamping or pressing tasks that require strict positional limits and short movements.
Is the Airtac SAIJ80 Adjustable Cylinder SAIJ80X25-20S the Right Cylinder?
Choose this 80mm bore when an application demands high thrust (up to 4523N push at 0.9 MPa) but requires shorter travel. If you need less force, stepping down to a 63mm bore yields a 1402N pull at 0.5 MPa. The rear adjuster acts purely as a mechanical stop for end-position tuning and does not lock the load; for true fail-safe load holding without live air pressure, select an SAIL or BSAI cylinder instead. As a dimensionally interchangeable ISO 15552 cylinder, it matches standard SAI replacements by bore, stroke, 20mm adjustment, PT G3/8 port, and -S magnet.
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 SAIJ80X25-20S FAQ
At an operating pressure of 0.5 MPa, 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 513 kgf.
The rear adjuster allows you to mechanically shorten the 25mm nominal stroke by up to 20mm, resulting in a usable travel window of 5-25mm. This stopper sets the end position but does not lock the load without continuous air pressure.
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