Airtac SAIJ80 Adjustable Cylinder SAIJ80AX425-75
The AirTAC Airtac SAIJ80 Adjustable Cylinder SAIJ80AX425-75 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 SAIJ80AX425-75
The AirTAC SAIJ80X425-75 is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster, allowing you to dial back the 425 mm nominal travel by up to 75 mm for a usable window of 350-425 mm. It delivers a robust 2513 N push force at 0.5 MPa, making it well-suited for heavy-duty positioning tasks. The extruded aluminum barrel features sensor grooves on both sides for straightforward switch placement.
This variant features a SUS420J2 stainless steel piston rod (material code A) and PT tapered port threads. The rear adjustment mechanism acts purely as a mechanical stop to set the retract end-position and relies on the integrated air cushions for end-of-stroke deceleration; it does not lock or hold the load without continuous air pressure. For load-holding requirements without live air, consider the SAIL or BSAI series.
Airtac SAIJ80 Adjustable Cylinder SAIJ80AX425-75 Technical Specifications
| Model | Airtac SAIJ80 Adjustable Cylinder SAIJ80AX425-75 |
|---|---|
| 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 SAIJ80AX425-75
| 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 SAIJ80AX425-75 Is Used
Product Changeover Adjustment
Dial in the retract position from 350 to 425 mm during packaging line format changes without physically replacing the cylinder or adding external stopper blocks.
Heavy-Duty Pressing
Leverage the 2513 N push force at 0.5 MPa for clamping or pressing assemblies, using the rear screw to fine-tune the exact end-of-stroke contact point.
Long-Stroke Material Handling
Actuate heavy pallet lifts or pushes over a 425 mm travel distance, utilizing the built-in air cushions and adjustable stop to manage deceleration of moving loads.
Is the Airtac SAIJ80 Adjustable Cylinder SAIJ80AX425-75 the Right Cylinder?
Select this 80 mm bore cylinder when your application requires substantial thrust (2513 N push at 0.5 MPa) alongside variable end-stop positioning. If your force requirements are lower, stepping down to a 63 mm bore provides 1559 N, whereas moving up to a 100 mm bore yields 3927 N. The adjustable stroke is ideal for machine setups requiring fine end-position tuning during commissioning or product changeovers, eliminating the need to swap out a fixed-stroke SAI cylinder. When replacing an ISO 15552 unit, match the 425 mm stroke, 75 mm adjustment, PT G3/8 port, and mounting style.
Because the 425 mm stroke creates a long unsupported rod extension, an external guide is recommended to prevent side-load wear, even though the 25 mm rod diameter and M20x1.5 thread offer high structural rigidity. SAIJ mounting options include Basic, FA, LB, TC, FTC, TCM1, and TCM2, omitting the FB, CA, CB, and CR variants. Operating speed ranges from 30-800 mm/s.
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 SAIJ80AX425-75 FAQ
The rear adjuster screw acts as a mechanical stop that shortens the effective retract stroke. For the SAIJ80X425-75, you can trim the nominal 425 mm stroke back by up to 75 mm, providing a usable travel window of 350-425 mm for precise end-position tuning at commissioning.
At a 0.5 MPa operating pressure, this 80 mm bore double-acting cylinder generates a push force of 2513 N and a pull force of 2268 N. The maximum thrust is 513 kgf at 1.0 MPa.
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