Airtac SAIJ80 Adjustable Cylinder SAIJ80AX45-20S
The AirTAC Airtac SAIJ80 Adjustable Cylinder SAIJ80AX45-20S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø80mm bore and 45mm 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
- Stroke45 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- CushionAdjustable, 36 mm
About the Airtac SAIJ80 Adjustable Cylinder SAIJ80AX45-20S
The AirTAC SAIJ80X45-20-S is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster that allows you to fine-tune the usable travel window from 25 to 45 mm without adding external stops. Delivering 2513 N of push force at 0.5 MPa, it handles demanding positioning tasks. The extruded aluminum barrel includes sensor grooves on both sides, and this -S configuration includes a magnet for use with AirTAC CMSE reed and DMSE solid-state switches.
This variant uses a SUS420J2 stainless steel rod for improved corrosion resistance and features PT tapered port threads (G3/8). The 25 mm piston rod and M20x1.5 rod thread provide a robust interface that handles higher side loads, though an external guide is still recommended for rigid payloads. The rear adjuster acts purely as a travel stop to set the end position and does not lock or hold the load without continuous air pressure.
Airtac SAIJ80 Adjustable Cylinder SAIJ80AX45-20S Technical Specifications
| Model | Airtac SAIJ80 Adjustable Cylinder SAIJ80AX45-20S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø80 mm |
| Stroke | 45 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 SAIJ80AX45-20S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 80 | Bore size in mm. |
| ×45 | 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 SAIJ80AX45-20S Is Used
Variable End-Stop Positioning
Dial in the exact clamping depth for varying material thicknesses on the fly, utilizing the 25 to 45 mm travel window to prevent over-travel without reprogramming the machine.
Machine Setup & Commissioning
Fine-tune the retract end-position during initial installation to perfectly align tooling, using the rear adjuster screw rather than fabricating custom external stopper blocks.
Product-Size Changeover Lines
Quickly adapt the stroke length for different product sizes running down a conveyor, adjusting the travel limit by up to 20 mm to handle family-of-parts efficiently.
Is the Airtac SAIJ80 Adjustable Cylinder SAIJ80AX45-20S the Right Cylinder?
Choose this 80 mm bore when an application requires more thrust than a 63 mm cylinder (which provides 1559 N push at 0.5 MPa) but does not need the full output of a 100 mm unit. The 20 mm adjustment range is ideal for machine changeovers, allowing operators to dial in the exact end-stop for different product sizes on the fly instead of physically swapping out a fixed-stroke SAI cylinder. Because the stroke is a short 45 mm, side-load stress is minimal, but the robust 25 mm rod further helps absorb any offset forces.
For an exact ISO 15552 replacement match, ensure your setup accommodates an 80 mm bore, 45 mm stroke, 20 mm adjustment range, G3/8 PT ports, and a magnet for position sensing. The SAIJ mounting set includes Basic, FA, LB, TC, FTC, TCM1, and TCM2 options, deliberately omitting FB, CA, CB, and CR. If your process requires true load-holding without live air pressure, this cylinder is insufficient; you should specify an AirTAC SAIL pneumatic lock or BSAI clamp-lock cylinder instead.
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 SAIJ80AX45-20S FAQ
At 0.5 MPa operating pressure, this 80 mm bore cylinder provides 2513 N of push force and 2268 N of pull force. At the maximum rated pressure of 1.0 MPa, it delivers up to 513 kgf of push force.
The rear adjuster screw acts as a mechanical stop that lets you shorten the effective stroke from the nominal 45 mm down to as little as 25 mm. This allows you to set the exact end-position at commissioning or during product changeovers without replacing the cylinder, though it does not lock the load without live air pressure.
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