Airtac SAIJ80 Adjustable Cylinder SAIJ80X140-20S
The AirTAC Airtac SAIJ80 Adjustable Cylinder SAIJ80X140-20S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø80mm bore and 140mm 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
- Stroke140 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- CushionAdjustable, 36 mm
About the Airtac SAIJ80 Adjustable Cylinder SAIJ80X140-20S
The AirTAC SAIJ80X140-20-S is a double-acting ISO 15552 profile cylinder featuring a rear-mounted stroke adjuster. It provides a usable travel window of 120 to 140 mm, letting you dial back the retract end-position by up to 20 mm during commissioning without swapping hardware. It delivers a robust 2513 N push force at 0.5 MPa, utilizing a 25 mm carbon steel rod and M20x1.5 thread to handle high side-load stresses.
This unit includes a magnet for position sensing, supporting AirTAC CMSE reed and DMSE solid-state switches housed within the dual-side sensor grooves. Fluid supply connects via G3/8 PT tapered ports, and the extruded aluminum barrel integrates adjustable air cushions at both ends to decelerate the load smoothly.
Airtac SAIJ80 Adjustable Cylinder SAIJ80X140-20S Technical Specifications
| Model | Airtac SAIJ80 Adjustable Cylinder SAIJ80X140-20S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø80 mm |
| Stroke | 140 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 SAIJ80X140-20S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 80 | Bore size in mm. |
| ×140 | 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 SAIJ80X140-20S Is Used
Machine Changeover
Quickly reposition the retract stop by up to 20 mm when switching product sizes on a packaging line, avoiding the need to physically swap out the cylinder.
End-Position Truing
Fine-tune the 120-140 mm travel window during initial commissioning to perfectly align a heavy press tool without adding bulky external mechanical stops.
Assembly Actuation
Leverage the 2513 N push force to drive heavy component seating operations, using the rear screw to compensate for minor mechanical variance.
Is the Airtac SAIJ80 Adjustable Cylinder SAIJ80X140-20S the Right Cylinder?
Choose this 80 mm bore when an application requires substantial thrust (2513 N push at 0.5 MPa) but demands finer end-position tuning than a fixed-stroke SAI cylinder offers. If your setup only needs 1402 N pull force, stepping down to a 63 mm bore saves space, while exceeding 4523 N push at 0.9 MPa requires stepping up to a 100 mm bore. Remember that the rear adjuster acts only as a travel stop, not a lock; the SAIJ cannot hold a load without live air pressure, so for dead-pilot holding, select an SAIL or BSAI cylinder instead.
For ISO 15552 replacement matching, specify an 80 mm bore, 140 mm stroke, 20 mm adjustment range, G3/8 PT ports, and the -S magnet option. Mounting choices are restricted to Basic, FA, LB, TC, FTC, TCM1, and TCM2. Because the 140 mm stroke is below the 300 mm threshold, external guide requirements are minimal, though the 25 mm rod still provides excellent resistance to deflection.
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 SAIJ80X140-20S FAQ
The rear adjuster screw acts as a mechanical stop that trims the effective stroke back from the nominal 140 mm down to a minimum of 120 mm. It allows you to set the exact retract end-position at commissioning, but it is not a lock and requires live air pressure to hold the load.
At a 0.5 MPa operating pressure, this 80 mm bore cylinder generates 2513 N of push force and 2268 N of pull force. At the maximum 1.0 MPa pressure, it can deliver up to 513 kgf of push force.
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