This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI80AX145, with the same bore, stroke, output force, port and mounting, so it fits the same application. The SAI replacement keeps the same ISO 15552 mounting interface, bore, stroke, output force and accessories, so it drops straight into existing fixtures. It is the current-production version of this cylinder with an upgraded piston seal.
Airtac SI80 Standard Air Cylinder SI80AX145
The AirTAC SI80 Standard Air Cylinder SI80AX145 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø80mm bore and 145mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI80AX145, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ80 mm
- Stroke145 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAI80AX145
- No minimum order. A single piece can be ordered.
- Ready in 3–5 business days. That is the time we take to process the order and hand it to the carrier. Transit time after that depends on the destination.
About the Airtac SI80 Standard Air Cylinder SI80AX145
The AirTAC SI80AX145 is a discontinued double-acting ISO 15552 profile cylinder with an 80mm bore and 145mm stroke. Delivering 2513 N push force at 0.5 MPa, it is replaced by the SAI80AX145. This direct upgrade shares the exact ISO 15552 mounting interface, G3/8 port, and M20x1.5 rod thread. The SAI features an upgraded piston seal with two Y-shaped one-way elements for low start-up pressure and long life. This SI80AX145-A variant uses a SUS420J2 stainless piston rod for corrosion resistance. It lacks a magnet, so it cannot accept a position switch.
Standard cylinders do not hold loads without live air; the 36mm adjustable cushions only decelerate near stroke ends. For load holding, use an external pilot check valve or the SAIL/BSAI lock variants. The SAI family also adds the SAIF integrated valve option. Operating pressure is 0.15-1.0 MPa, with a Viton H seal option extending heat resistance to 150 C.
Airtac SI80 Standard Air Cylinder SI80AX145 Technical Specifications
| Model | Airtac SI80 Standard Air Cylinder SI80AX145 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI80AX145 |
| Bore size | Ø80 mm |
| Stroke | 145 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 standard stroke | Up to 1500 mm |
Specifications follow the official AirTAC SI datasheet (now discontinued). The SAI80AX145 carries the same ISO 15552 ratings. Confirm against the product label before installation. Thread options: PT / G / 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 | |
The SAI80AX145 produces the same force from the same bore. Actual usable force is lower than theoretical; size with a margin.
Model Code: Airtac SI80 Standard Air Cylinder SI80AX145
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 80 | Bore size in mm. |
| ×145 | Stroke length in mm. |
| -S | Optional built-in magnet for sensor position sensing. |
Legacy SI-family variants: SID (double rod), SIJ (adjustable stroke) — each maps to its SAI equivalent (SID→SAID, SIJ→SAIJ). Rod material: carbon steel (blank) / SUS420J2 (A) / SUS304 (B).
Where the Airtac SI80 Standard Air Cylinder SI80AX145 Is Used
Mid-Tonnage Pressing
Applies 2513 N of push force at 0.5 MPa for assembling bearings or stamping light components, utilizing the SUS420J2 stainless rod in humid environments.
Transfer Diversion
Moves products along a 145mm stroke using the ISO 15552 mounting interface to fit existing conveyor frameworks without redesigning fixtures.
Replacing the Airtac SI80 Standard Air Cylinder SI80AX145 with the SAI80AX145
To replace the discontinued SI80AX145, order the SAI80AX145. Verify the ISO 15552 mounting interface, 145mm stroke, G3/8 port, and your specific mounting accessory (LB, FA, TC, etc.). Because this is the -A variant, ensure you specify the SUS420J2 stainless rod. This SKU has no magnet (-S), so it cannot support legacy CS1-B/DS1-B sensors; if sensing is needed, order an SAI with S. For sizing, the 80mm bore yields 2513 N push at 0.5 MPa; if less force is needed, a 63mm bore offers 1559 N, while a 100mm bore provides 3927 N. Since this is a 145mm stroke, check for side-load rod-bending risks and use guide rails if the load is not perfectly axial. For load holding on air loss, select the SAIL or BSAI lock variant, or add an external rod lock.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI80AX145
- ✓ Same bore / stroke / force
- ✓ Port/thread type (PT/G/NPT)
- ✓ Magnet (-S) for sensors?
- ✓ Mounting reused (FA/FB/CA/CB/CR/LB/TC)
Airtac SI80 Standard Air Cylinder SI80AX145 FAQ
Yes, the SI80AX145 is discontinued. The direct replacement is the SAI80AX145. It shares the same ISO 15552 mounting interface, 80mm bore, 145mm stroke, G3/8 port, and output force, fitting directly into existing fixtures.
The 80mm bore features a G3/8 port and delivers 2513 N push / 2268 N pull at 0.5 MPa, 3518 N push at 0.7 MPa, 4523 N push at 0.9 MPa, and a maximum theoretical force of 513 kgf at 1.0 MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI80AX145
Send us the quantity and destination. We confirm price, stock and lead time on the SAI80AX145 replacement — usually within 7-8 hours.