Airtac SAIJ80 Adjustable Cylinder SAIJ80AX70-20
The AirTAC Airtac SAIJ80 Adjustable Cylinder SAIJ80AX70-20 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 SAIJ80AX70-20
The AirTAC SAIJ80X70-20 is a double-acting, single-rod ISO 15552 profile cylinder equipped with a rear stroke adjuster. It delivers a robust 2513N of push force at 0.5 MPa, featuring a 25mm SUS420J2 stainless steel rod and PT tapered G3/8 ports. By turning the rear screw, you can trim the effective travel into a precise 50-70mm window, perfect for dialing in end positions during machine setup.
This adjustable model utilizes an extruded aluminum barrel with sensor grooves on both sides, maintaining a true profile design rather than a tie-rod construction. The rear stopper acts solely as a travel limit to fine-tune deceleration alongside the standard air cushions; it is not a locking device and will not hold a load without continuous live air pressure.
Airtac SAIJ80 Adjustable Cylinder SAIJ80AX70-20 Technical Specifications
| Model | Airtac SAIJ80 Adjustable Cylinder SAIJ80AX70-20 |
|---|---|
| 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 SAIJ80AX70-20
| 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 SAIJ80AX70-20 Is Used
Product Changeovers
Quickly dial in the 50-70mm travel window during format size changes on packaging lines without replacing hardware.
End-Stop Tuning
Fine-tune the retract position at commissioning to achieve precise mechanical alignment for critical tooling.
Variable End Positioning
Adjust the rear stopper screw on the fly to accommodate minor variations in incoming part dimensions.
Is the Airtac SAIJ80 Adjustable Cylinder SAIJ80AX70-20 the Right Cylinder?
Select this 80mm bore when an application requires higher thrust than a 63mm cylinder (which provides 1559N push at 0.5 MPa) but still needs compact 70mm nominal travel. The 20mm adjustment range is ideal for product-size changeovers on a line, allowing operators to shift the end-stop without physically swapping the cylinder or adding external stops. For load-holding requirements without live air pressure, consider an AirTAC SAIL or BSAI cylinder instead.
To match this exact ISO 15552 footprint for a direct replacement, ensure you specify the 80mm bore, 70mm stroke, 20mm adjustment range, PT port thread, and SUS420J2 rod material. Mounting options include the standard SAIJ subset: Basic, FA, LB, TC, FTC, TCM1, and TCM2.
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 SAIJ80AX70-20 FAQ
At a 0.5 MPa operating pressure, this 80mm bore cylinder provides 2513N of push force and 2268N of pull force. At the maximum 1.0 MPa pressure, it can deliver up to 513 kgf.
The rear adjuster screw allows you to shorten the 70mm nominal stroke by up to 20mm, creating a usable travel window of 50 to 70mm. This stopper only limits the travel end and does not lock the load without air pressure.
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