This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI80AX145S, 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 SI80AX145S
The AirTAC SI80 Standard Air Cylinder SI80AX145S 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 SAI80AX145S, 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 → SAI80AX145S
- 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 SI80AX145S
The AirTAC SI80AX145S is a discontinued double-acting ISO 15552 profile cylinder with an 80mm bore and 145mm stroke. Featuring a SUS420J2 stainless piston rod and a built-in magnet for legacy CS1-B/DS1-B sensors, it delivers 2513 N push and 2268 N pull at 0.5 MPa through its G3/8 port.
AirTAC replaced this EOL unit with the SAI80AX145S, a direct sharing the same ISO 15552 mounting interface, force, and cushions. The SAI upgrades the piston seal to two Y-shaped one-way elements for low start-up pressure.
Airtac SI80 Standard Air Cylinder SI80AX145S Technical Specifications
| Model | Airtac SI80 Standard Air Cylinder SI80AX145S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI80AX145S |
| 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 SAI80AX145S 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 SAI80AX145S 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 SI80AX145S
| 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 SI80AX145S Is Used
Mid-Tonnage Clamping
Holds heavy workpieces during machining, utilizing the 2513 N push force at 0.5 MPa with the SUS420J2 stainless rod resisting coolant corrosion.
Package Diversion
Drives heavy-duty routing gates on high-throughput lines, where the 145 mm stroke and 30-800 mm/s speed range provide rapid actuation.
Replacing the Airtac SI80 Standard Air Cylinder SI80AX145S with the SAI80AX145S
To replace the SI80AX145S, order the SAI80AX145S. It drops directly into existing fixtures via the identical ISO 15552 interface, 80mm bore, 145mm stroke, G3/8 port, and M20x1.5 rod thread. Retain your mounting accessory and confirm the -S magnet for current AirTAC switches. Neighbouring bores are 63mm (1559 N @0.5) and 100mm (3927 N @0.5); this 80mm bore gives 2513 N push @0.5 MPa. The -A rod denotes SUS420J2 stainless steel for corrosion resistance. A plain cylinder drifts on air loss—the cushion only decelerates. For load holding, use an external pilot check valve or the SAIL/BSAI lock variants.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI80AX145S
- ✓ 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 SI80AX145S FAQ
Yes, the SI80AX145S is discontinued. The direct replacement is the SAI80AX145S. It shares the identical ISO 15552 mounting interface, 80mm bore, 145mm stroke, output force, and G3/8 port, fitting existing fixtures perfectly while upgrading the piston seal.
The 80mm bore features a G3/8 air port and M20x1.5 rod thread. It delivers 2513 N push and 2268 N pull at 0.5 MPa, 3518 N push at 0.7 MPa, 4523 N push at 0.9 MPa, and a theoretical max of 513 kgf at 1.0 MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI80AX145S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI80AX145S replacement — usually within 7-8 hours.