This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI80X1800S, 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 SI80X1800S
The AirTAC SI80 Standard Air Cylinder SI80X1800S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø80mm bore and 1800mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI80X1800S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ80 mm
- Stroke1800 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAI80X1800S
- 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 SI80X1800S
The AirTAC SI80X1800S is a discontinued double-acting ISO 15552 profile cylinder with an extruded aluminum barrel. Built for heavy-duty motion, it delivers 2513 N push force at 0.5 MPa through a G3/8 port. Because this 1800 mm stroke exceeds the 1500 mm standard maximum, it was produced as a non-standard, made-to-order unit. AirTAC replaced the SI line with the SAI family; the direct replacement is the SAI80X1800S, retaining the identical bore, stroke, output force, port size, and ISO 15552 mounting interface.
The SAI80X1800S upgrades the piston seal to two Y-shaped one-way elements for lower start-up pressure and longer life. Note that a plain cylinder drifts on air loss, as the cushion only decelerates; for load holding, explore the SAIL or BSAI lock variants. The -S suffix on this legacy unit means it has a piston magnet for CS1-B/DS1-B sensors, whereas the SAI replacement uses current AirTAC switches.
Airtac SI80 Standard Air Cylinder SI80X1800S Technical Specifications
| Model | Airtac SI80 Standard Air Cylinder SI80X1800S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI80X1800S |
| Bore size | Ø80 mm |
| Stroke | 1800 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 SAI80X1800S 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 SAI80X1800S 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 SI80X1800S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 80 | Bore size in mm. |
| ×1800 | 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 SI80X1800S Is Used
Long-Stroke Material Transfer
Pushes heavy pallets or workpieces across extended conveyor sections, utilizing the full 1800 mm travel distance.
High-Reach Vertical Lifting
Elevates loads up to 128 kg in storage retrieval systems, relying on the 2513 N thrust at 0.5 MPa.
Large Press Ejection
Clears bulky finished parts from wide machinery beds, requiring the robust 80 mm bore and heavy thrust capacity.
Replacing the Airtac SI80 Standard Air Cylinder SI80X1800S with the SAI80X1800S
To replace the discontinued SI80X1800S, order the SAI80X1800S direct equivalent. Confirm your ISO 15552 mounting interface (LB, FA, CA, TC, etc.), the G3/8 port thread (PT, G, or NPT), and the M20x1.5 rod-end thread. Because the 1800 mm stroke exceeds the 1500 mm standard maximum for this 80 mm bore, it remains a non-standard, made-to-order item; at this length, you must use external guides to prevent rod bending and side-load damage. If you need to downsize, the 63 mm bore offers 1559 N push at 0.5 MPa; if you need more force, the 100 mm bore provides 3927 N. Remember that a standard cylinder does not hold load without live air—use an external pilot check valve or the SAIL/BSAI lock variants for secure holding.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI80X1800S
- ✓ 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 SI80X1800S FAQ
Yes, the SI80X1800S is discontinued. The direct replacement is the SAI80X1800S. It is dimensionally interchangeable per ISO 15552, matching the 80 mm bore, 1800 mm stroke, output force, G3/8 port, and mounting fixtures. The SAI features an upgraded two Y-shaped element piston seal for lower start-up pressure.
At 0.5 MPa, the push force is 2513 N and the pull force is 2268 N. At 0.7 MPa it pushes 3518 N, and at 0.9 MPa it pushes 4523 N. The theoretical maximum force is 513 kgf at 1.0 MPa. Operating pressure is 0.15-1.0 MPa, speed is 30-800 mm/s, and the G3/8 port and 36 mm cushions are fixed by the 80 mm bore.
Related AirTAC SAI Cylinders
Request a Quote for the SAI80X1800S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI80X1800S replacement — usually within 7-8 hours.