This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI80X1440S, 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 SI80X1440S
The AirTAC SI80 Standard Air Cylinder SI80X1440S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø80mm bore and 1440mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI80X1440S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ80 mm
- Stroke1440 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAI80X1440S
- 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 SI80X1440S
The AirTAC SI80X1440S is a discontinued double-acting ISO 15552 profile cylinder with a 1440 mm stroke, delivering 2513 N push force at 0.5 MPa through its G3/8 port. AirTAC replaced this legacy unit with the SAI80X1440S, a direct replacement matching the exact bore, stroke, force, port, and ISO 15552 mounting interface.
The SAI upgrade features a redesigned piston seal with two Y-shaped one-way elements for low start-up pressure and extended life. The SAI family also introduces lock variants (SAIL, BSAI) absent in the SI line, and the original -S magnet works with legacy CS1-B/DS1-B sensors.
Airtac SI80 Standard Air Cylinder SI80X1440S Technical Specifications
| Model | Airtac SI80 Standard Air Cylinder SI80X1440S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI80X1440S |
| Bore size | Ø80 mm |
| Stroke | 1440 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 SAI80X1440S 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 SAI80X1440S 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 SI80X1440S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 80 | Bore size in mm. |
| ×1440 | 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 SI80X1440S Is Used
Long-Stroke Diversion
Pushes heavy pallets across wide transfer lines using the full 1440 mm travel, relying on the 2513 N thrust at 0.5 MPa to overcome friction.
Vertical Material Lift
Elevates goods up to 128 kg in storage retrieval systems, requiring external linear guides to prevent rod bending over the extended length.
Automated Press Clamping
Secures large workpieces in machining centers where the 80 mm bore and adjustable 36 mm cushions ensure smooth deceleration of heavy masses.
Replacing the Airtac SI80 Standard Air Cylinder SI80X1440S with the SAI80X1440S
To replace the SI80X1440S, order the SAI80X1440S. Confirm the ISO 15552 mounting interface (LB, FA, CA, TC, etc.), the G3/8 port thread (PT/G/NPT), and the -S magnet for position sensing. Because the 1440 mm stroke is very long, prevent rod bending by guiding the load externally and minimizing side loads. If sizing down, a 63 mm bore yields 1559 N push at 0.5 MPa; if sizing up, a 100 mm bore yields 3927 N. Note that a standard cylinder drifts on air loss—the cushion only decelerates near stroke end. For load holding on air failure, use an external pilot check valve, rod lock, or the SAIL/BSAI lock variants. Rod material options include carbon steel, SUS420J2 (A), and SUS304 (B).
Replacement checklist
- ✓ Same ISO 15552 interface → SAI80X1440S
- ✓ 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 SI80X1440S FAQ
Yes, the SI80X1440S is discontinued. The direct replacement is the AirTAC SAI80X1440S. It features the same ISO 15552 mounting interface, 80 mm bore, 1440 mm stroke, output force, and G3/8 port, dropping directly into existing fixtures.
The 80 mm bore uses a G3/8 air port. At 0.5 MPa it provides 2513 N push and 2268 N pull force. At 0.7 MPa push is 3518 N, and at 0.9 MPa it is 4523 N. The theoretical maximum force is 513 kgf at 1.0 MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI80X1440S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI80X1440S replacement — usually within 7-8 hours.