Airtac SAIJ80 Adjustable Cylinder SAIJ80AX425-50S
The AirTAC Airtac SAIJ80 Adjustable Cylinder SAIJ80AX425-50S 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 SAIJ80AX425-50S
The AirTAC SAIJ80X425-50-S is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster that allows you to trim the effective travel back by up to 50 mm. This specific SKU provides a usable stroke window of 375 to 425 mm, enabling precise end-position tuning at commissioning without swapping out the entire actuator. Built with a 25 mm carbon steel core and a SUS420J2 (A) stainless steel rod, it handles heavy loads with 3518 N of push force at 0.7 MPa and 4523 N at 0.9 MPa.
The -S magnet option supports position sensing via AirTAC CMSE reed and DMSE electronic switches, which mount directly into the extruded aluminum barrel's dual sensor grooves. Fluid supply arrives through PT G3/8 tapered ports, while the 36 mm variable air cushions at both ends manage deceleration. The rear adjuster acts purely as a mechanical stop to set the travel end and does not hold the load without live air pressure; for fail-safe load holding, consider the SAIL or BSAI series.
Airtac SAIJ80 Adjustable Cylinder SAIJ80AX425-50S Technical Specifications
| Model | Airtac SAIJ80 Adjustable Cylinder SAIJ80AX425-50S |
|---|---|
| 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 SAIJ80AX425-50S
| 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 SAIJ80AX425-50S Is Used
Product Changeover Lines
Dial the stroke back by up to 50 mm to accommodate different package sizes on a conveyor without physically replacing the cylinder or bolting on external stops.
Machine Setup Tuning
Fine-tune the 375 to 425 mm travel window during initial commissioning to perfectly time the tooling contact point, avoiding costly mechanical rework.
Heavy Assembly Stations
Leverage the 80 mm bore's 4523 N push force at 0.9 MPa to press or seat heavy components, using the rear adjuster to limit over-travel precisely.
Is the Airtac SAIJ80 Adjustable Cylinder SAIJ80AX425-50S the Right Cylinder?
Choose this 80 mm bore when a 50 mm bore's 1374 N push at 0.5 MPa is insufficient, but a 100 mm bore's 5497 N at 0.7 MPa is excessive. The 50 mm adjustment range is ideal for product-size changeovers on a line, letting you dial in a new end-stop on the fly instead of adding external stopper blocks. When replacing an ISO 15552 cylinder, match the 80 mm bore, 425 mm nominal stroke, 50 mm adjustment, PT G3/8 port, and -S magnet.
Because the 425 mm stroke creates a long unsupported rod extension, you must use an external guide to prevent side-load damage to the rod seals. The SAIJ mounting set includes Basic, FA, LB, TC, FTC, TCM1, and TCM2, omitting the FB, CA, CB, and CR options found on other variants.
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 SAIJ80AX425-50S FAQ
The rear adjusting screw acts as a mechanical stop that lets you shorten the nominal 425 mm stroke by up to 50 mm, providing an effective travel window of 375 to 425 mm. It sets the end position but does not lock the load without live air pressure.
At 0.7 MPa operating pressure, the SAIJ80 bore generates 3518 N of push force and 2268 N of pull force. At 0.9 MPa, the push force increases to 4523 N.
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