Airtac SAIJ80 Adjustable Cylinder SAIJ80AX425-20
The AirTAC Airtac SAIJ80 Adjustable Cylinder SAIJ80AX425-20 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø80mm bore and 425mm 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
- Stroke425 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- CushionAdjustable, 36 mm
About the Airtac SAIJ80 Adjustable Cylinder SAIJ80AX425-20
The AirTAC SAIJ80X425-20 is a double-acting ISO 15552 profile cylinder with a rear stroke adjuster, providing a usable travel window of 405 to 425 mm. It delivers 2513 N of push force and 2268 N of pull force at a 0.5 MPa operating pressure, making it well-suited for heavy-duty positioning tasks. The extruded aluminum barrel features sensor grooves on both sides for straightforward detection integration.
This variant features a SUS420J2 stainless steel rod (option A) for improved corrosion resistance and uses PT tapered port threads. The rear adjustment screw functions purely as a travel stop to dial in the exact end position during commissioning without adding external stops; it does not hold the load without live air pressure.
Airtac SAIJ80 Adjustable Cylinder SAIJ80AX425-20 Technical Specifications
| Model | Airtac SAIJ80 Adjustable Cylinder SAIJ80AX425-20 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø80 mm |
| Stroke | 425 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 SAIJ80AX425-20
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 80 | Bore size in mm. |
| ×425 | 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 SAIJ80AX425-20 Is Used
Machine Changeover
Dial in the exact retract stop within the 405-425 mm window during product size changes on a packaging line, eliminating the need to physically swap out cylinders for different formats.
Material Pusher Alignment
Precisely tune the end-of-stroke position to match varying conveyor belt widths or pusher distances at commissioning without installing bulky external hard stops.
Heavy Fixture Positioning
Leverage the 2513 N thrust at 0.5 MPa to move heavy machining fixtures, using the rear screw to gently set the final resting coordinates for high-accuracy operations.
Is the Airtac SAIJ80 Adjustable Cylinder SAIJ80AX425-20 the Right Cylinder?
Select this 80 mm bore when a 50 mm bore (offering 982 N push at 0.5 MPa) is insufficient, but a 100 mm bore (3927 N push) would be excessive. The 20 mm rear adjuster is ideal for fine-tuning the retract end-position during machine setup or product changeover, avoiding the need to physically swap a fixed-stroke SAI cylinder. For load-holding without continuous air pressure, consider the SAIL or BSAI series, as the SAIJ adjuster is only a stop.
With a 425 mm stroke, the 25 mm rod diameter and M20x1.5 rod thread provide robust mechanical strength, but the extended travel distance means an external guide rail is highly recommended to prevent excessive side-loading on the piston rod. This model uses a reduced SAIJ mounting set (Basic, FA, LB, TC, FTC, TCM1, TCM2) and omits FB, CA, CB, and CR mounts.
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 SAIJ80AX425-20 FAQ
At a 0.5 MPa operating pressure, this 80 mm bore cylinder provides 2513 N of push force and 2268 N of pull force. It can reach a maximum thrust of 513 kgf at 1.0 MPa.
The rear adjuster screw lets you shorten the 425 mm nominal stroke by up to 20 mm, creating a 405-425 mm usable travel window. It acts as a mechanical stop for end-position tuning and is not a lock, meaning it cannot hold a load without live air pressure.
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