This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI80AX120, 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 SI80AX120
The AirTAC SI80 Standard Air Cylinder SI80AX120 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø80mm bore and 120mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI80AX120, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ80 mm
- Stroke120 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAI80AX120
- 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 SI80AX120
The AirTAC SI80AX120 is a discontinued double-acting ISO 15552 profile cylinder with an 80mm bore and 120mm stroke. It delivers 2513N push force at 0.5MPa through a G3/8 port. The direct replacement is the SAI80AX120, which matches the interface, bore, stroke, force, and mounting exactly. The SAI features an upgraded piston seal with two Y-shaped one-way elements for low start-up pressure and long life. The -A suffix denotes a SUS420J2 stainless piston rod for corrosion resistance. With no -S magnet, this SKU cannot accept a sensor.
The SAI family also introduces variants the SI lacked, including the SAIL air-released lock and BSAI clamp-lock for load holding, plus the SAIF integrated valve for bores up to 100mm.
Airtac SI80 Standard Air Cylinder SI80AX120 Technical Specifications
| Model | Airtac SI80 Standard Air Cylinder SI80AX120 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI80AX120 |
| Bore size | Ø80 mm |
| Stroke | 120 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 SAI80AX120 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 SAI80AX120 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 SI80AX120
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 80 | Bore size in mm. |
| ×120 | 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 SI80AX120 Is Used
Package Diverting
Drives diverting arms on packaging lines where the 120mm stroke and 2513N push force reliably redirect heavy cartons at speed.
Clamp Actuation
Secures large steel workpieces in machining fixtures, utilizing the SUS420J2 stainless rod to resist coolant corrosion.
Pallet Stopping
Functions as a heavy-duty end-stop on roller conveyors, absorbing pallet impacts using the 36mm adjustable air cushions.
Replacing the Airtac SI80 Standard Air Cylinder SI80AX120 with the SAI80AX120
To replace the SI80AX120, order the SAI80AX120. Verify the ISO 15552 mounting interface, 80mm bore, 120mm stroke, G3/8 port (PT/G/NPT thread options), and your specific mounting accessory. Because this SKU lacks the -S magnet, it cannot support magnetic sensing; if position feedback is needed, select an SAI80X120S and use current AirTAC switches. If sizing up or down, neighboring bores are 63mm (1559N push @0.5MPa) and 100mm (3927N push @0.5MPa). Note that a plain cylinder drifts on air loss—the cushion only decelerates—so for load holding use an external rod lock, pilot check valve, or the SAIL/BSAI lock variant.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI80AX120
- ✓ 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 SI80AX120 FAQ
Yes, the SI80AX120 is discontinued. The direct replacement is the SAI80AX120. It is dimensionally interchangeable per ISO 15552, retaining the same 80mm bore, 120mm stroke, output force, G3/8 port, and mounting interface.
The 80mm bore uses a G3/8 port. At 0.5MPa it provides 2513N push and 2268N pull force. At 0.7MPa push is 3518N, and at 0.9MPa push is 4523N. The theoretical maximum force is 513kgf at 1.0MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI80AX120
Send us the quantity and destination. We confirm price, stock and lead time on the SAI80AX120 replacement — usually within 7-8 hours.