Airtac SAIJ80 Adjustable Cylinder SAIJ80AX70-50
The AirTAC Airtac SAIJ80 Adjustable Cylinder SAIJ80AX70-50 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø80mm bore and 70mm 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
- Stroke70 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- CushionAdjustable, 36 mm
About the Airtac SAIJ80 Adjustable Cylinder SAIJ80AX70-50
The AirTAC SAIJ80X70-50 is a double-acting ISO 15552 profile cylinder featuring a rear-mounted stroke adjuster. It delivers 2513N of push force at 0.5 MPa and provides a usable travel window of 20-70mm, letting you trim the nominal 70mm stroke by up to 50mm during machine setup. The extruded aluminum barrel includes sensor grooves on both sides for flexible switch placement.
This unit is configured with an SUS420J2 stainless steel rod (code A) for improved corrosion resistance and features PT tapered port threads with a G3/8 connection. The rear stopper acts purely as a travel end-limit, meaning it cannot hold a load without continuous live air pressure. For locking requirements, consider the SAIL or BSAI variants.
Airtac SAIJ80 Adjustable Cylinder SAIJ80AX70-50 Technical Specifications
| Model | Airtac SAIJ80 Adjustable Cylinder SAIJ80AX70-50 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø80 mm |
| Stroke | 70 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 SAIJ80AX70-50
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 80 | Bore size in mm. |
| ×70 | 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 SAIJ80AX70-50 Is Used
Machine Changeover
Quickly adjust the 20-70mm travel window to accommodate new product sizes on a packaging line without swapping the actuator.
End-Stop Calibration
Fine-tune the exact retraction point during commissioning to prevent mechanical crashes, using the rear screw instead of external shims.
Variable Positioning
Set precise lower endpoints for assembly presses that need to adapt stroke depth on the fly for different workpiece heights.
Is the Airtac SAIJ80 Adjustable Cylinder SAIJ80AX70-50 the Right Cylinder?
Select this 80mm bore actuator when an application requires moderate thrust (2513N push at 0.5 MPa) alongside highly variable end-position tuning. If your setup demands less force, stepping down to a 63mm bore yields 1559N, whereas moving up to a 100mm bore provides 3927N. The SAIJ80X70-50 is chosen over a fixed-stroke SAI cylinder when you need to dial in the exact end-stop during commissioning or product changeovers without adding external mechanical stops.
When replacing an ISO 15552 cylinder, match the 80mm bore, 70mm nominal stroke, 50mm adjustment range, G3/8 PT ports, and the desired mounting style. SAIJ supports a specific subset of mounts: Basic, FA, LB, TC, FTC, TCM1, and TCM2, omitting FB, CA, CB, and CR options. Because the stroke is under 300mm, side-load stress on the 25mm rod is manageable, though external guides are still recommended for heavy lateral loads.
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 SAIJ80AX70-50 FAQ
At 0.5 MPa operating pressure, this 80mm bore cylinder provides 2513N of push force and 2268N of pull force. At 0.7 MPa, the push force increases to 3518N.
The rear adjuster allows you to shorten the effective stroke by up to 50mm from the nominal 70mm, creating a usable travel window of 20-70mm. This stopper only limits the travel end and does not lock the load without live air pressure.
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