This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI80AX45S, 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 SI80AX45S
The AirTAC SI80 Standard Air Cylinder SI80AX45S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø80mm bore and 45mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI80AX45S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ80 mm
- Stroke45 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAI80AX45S
- 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 SI80AX45S
The AirTAC SI80AX45S is a discontinued double-acting ISO 15552 profile cylinder with an extruded aluminum barrel, adjustable air cushions, and a 45 mm stroke. It delivers a push force of 2513 N and pull force of 2268 N at 0.5 MPa, utilizing a G3/8 port and a SUS420J2 stainless steel piston rod (the -A option) for corrosion resistance. The direct replacement is the SAI80AX45S, which shares the same ISO 15552 mounting interface, bore, stroke, force, and port size.
The SAI upgrade features a modernized piston seal with two Y-shaped one-way elements for low start-up pressure and extended life. This -S model includes a piston magnet for legacy CS1-B/DS1-B sensors, while the SAI family also introduces SAIL, SAIF, and BSAI lock variants the original SI lacked.
Airtac SI80 Standard Air Cylinder SI80AX45S Technical Specifications
| Model | Airtac SI80 Standard Air Cylinder SI80AX45S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI80AX45S |
| 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 standard stroke | Up to 1500 mm |
Specifications follow the official AirTAC SI datasheet (now discontinued). The SAI80AX45S 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 SAI80AX45S 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 SI80AX45S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 80 | Bore size in mm. |
| ×45 | 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 SI80AX45S Is Used
Clamp and Press Operations
Ideal for mid-tier clamping fixtures requiring reliable 2513 N push force at 0.5 MPa, where the SUS420J2 stainless rod resists moisture in washdown machining areas.
Short-Stroke Diverting
The 45 mm stroke provides rapid actuation for lane diverters or package stops on production lines, operating efficiently at 30-800 mm/s.
Replacing the Airtac SI80 Standard Air Cylinder SI80AX45S with the SAI80AX45S
To replace the SI80AX45S, order the SAI80AX45S. Confirm your ISO 15552 mounting interface, the 45 mm stroke, the G3/8 port, and your specific mounting accessory (LB, FA, TC, etc.). Because this unit has the -S magnet, it supports CS1-B/DS1-B switches, though the SAI replacement uses current AirTAC sensors. Sizing both ways: the 80 mm bore yields 2513 N push at 0.5 MPa, while the neighboring 63 mm bore offers 1559 N. If your application requires load holding on air loss, note that a plain cylinder drifts and the cushion only decelerates; you must add an external rod lock, a pilot check valve, or step up to the SAIL or BSAI lock variant.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI80AX45S
- ✓ 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 SI80AX45S FAQ
Yes, the SI80AX45S is discontinued. The direct replacement is the AirTAC SAI80AX45S. It is dimensionally interchangeable per ISO 15552, retaining the exact same bore, stroke, force, G3/8 port, and mounting interface for a seamless fixture swap.
This double-acting 80 mm bore cylinder uses a G3/8 air port. It generates a push force of 2513 N and a pull force of 2268 N at 0.5 MPa. At 0.7 MPa the push force is 3518 N, and the theoretical maximum force is 513 kgf at 1.0 MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI80AX45S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI80AX45S replacement — usually within 7-8 hours.