This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI80X900S, 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 SI80X900S
The AirTAC SI80 Standard Air Cylinder SI80X900S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø80mm bore and 900mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI80X900S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ80 mm
- Stroke900 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAI80X900S
- 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 SI80X900S
The AirTAC SI80X900S is a discontinued double-acting ISO 15552 profile cylinder featuring an extruded aluminum barrel, a 900 mm stroke, and a G3/8 port. Delivering 2513 N of push force at 0.5 MPa, it is replaced directly by the SAI80X900S. The SAI upgrade introduces a two Y-shaped one-way piston seal for low start-up pressure and long life, while the SAI family adds SAIL, SAIF, and BSAI lock variants the SI lacked.
This unit includes a -S magnet for legacy CS1-B/DS1-B switches. The SAI replacement is dimensionally interchangeable per ISO 15552 mounting-interface dimensions, fitting existing fixtures perfectly.
Airtac SI80 Standard Air Cylinder SI80X900S Technical Specifications
| Model | Airtac SI80 Standard Air Cylinder SI80X900S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI80X900S |
| Bore size | Ø80 mm |
| Stroke | 900 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 SAI80X900S 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 SAI80X900S 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 SI80X900S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 80 | Bore size in mm. |
| ×900 | 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 SI80X900S Is Used
Long-Stroke Diversion
Pushes heavy pallets across 900 mm transfer lines using 2513 N of thrust at 0.5 MPa.
Large Fixture Actuation
Indexes heavy welding fixtures over a 900 mm span, relying on the 36 mm adjustable cushions for smooth stops.
Replacing the Airtac SI80 Standard Air Cylinder SI80X900S with the SAI80X900S
To replace the SI80X900S, order the SAI80X900S. Confirm the ISO 15552 mounting accessory (LB, FA, TC, etc.), the G3/8 port thread (PT/G/NPT), and the -S magnet for current AirTAC switches. Sizing both ways: the neighboring 63 mm bore yields 1559 N push at 0.5 MPa, while the 100 mm bore yields 3927 N. For this 900 mm stroke, use an external guide to prevent rod bending and side-load damage. A plain cylinder drifts on air loss; for load holding, use an external rod lock, pilot check valve, or the SAIL/BSAI lock variant.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI80X900S
- ✓ 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 SI80X900S FAQ
Yes, the SI80X900S is discontinued. The direct replacement is the SAI80X900S. It shares the exact same ISO 15552 mounting interface, 80 mm bore, 900 mm stroke, G3/8 port, and output force, fitting existing fixtures without modification.
It features a G3/8 air port, a 25 mm rod, and an M20x1.5 thread. Force output is 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 maximum theoretical force of 513 kgf at 1.0 MPa. Operating speed is 30-800 mm/s.
Related AirTAC SAI Cylinders
Request a Quote for the SAI80X900S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI80X900S replacement — usually within 7-8 hours.