This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI80X205S, 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 SI80X205S
The AirTAC SI80 Standard Air Cylinder SI80X205S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø80mm bore and 205mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI80X205S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ80 mm
- Stroke205 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAI80X205S
- 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 SI80X205S
The AirTAC SI80X205S is a discontinued double-acting ISO 15552 profile cylinder with an 80mm bore and 205mm stroke. It delivers 2513N push and 2268N pull at 0.5MPa through a G3/8 port. AirTAC replaced this legacy unit with the SAI80X205S, a direct upgrade retaining the exact ISO 15552 mounting interface, bore, stroke, force, port and accessories. The SAI features an upgraded piston seal using two Y-shaped one-way elements for low start-up pressure and long life. The SAI family also introduces variants the SI lacked, including the SAIL air-released lock, SAIF integrated valve, and BSAI clamp-lock.
This SI80X205S includes a piston magnet for legacy CS1-B/DS1-B sensors, while the SAI replacement uses current AirTAC switches. Rod material options include carbon steel, SUS420J2, or SUS304, and a Viton H seal option extends operating temperature to 150C.
Airtac SI80 Standard Air Cylinder SI80X205S Technical Specifications
| Model | Airtac SI80 Standard Air Cylinder SI80X205S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI80X205S |
| Bore size | Ø80 mm |
| Stroke | 205 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 SAI80X205S 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 SAI80X205S 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 SI80X205S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 80 | Bore size in mm. |
| ×205 | 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 SI80X205S Is Used
Press Ejection
Provides 2513N of push force at 0.5MPa to reliably eject formed metal parts from stamping dies.
Pallet Diversion
Actuates heavy-duty diverter arms on packaging lines, utilizing the 205mm stroke to redirect full pallets.
Replacing the Airtac SI80 Standard Air Cylinder SI80X205S with the SAI80X205S
To replace the discontinued SI80X205S, order the SAI80X205S. It is dimensionally interchangeable per ISO 15552, dropping directly into existing fixtures with the same 80mm bore, 205mm stroke, G3/8 port, and M20x1.5 rod thread. Confirm your mounting accessory (LB, FA, TC, etc.) and thread standard (PT, G, NPT) match. The -S suffix indicates a magnet for position sensing; the legacy CS1-B/DS1-B sensors are superseded by current AirTAC switches on the SAI.
When sizing both ways, dropping to a 63mm bore reduces push force to 1559N at 0.5MPa, while stepping up to a 100mm bore increases it to 3927N. A plain SI or SAI cylinder does not hold load on air loss; the adjustable 36mm cushion only decelerates near stroke end. For load holding, use an external pilot check valve, rod lock, or the SAIL/BSAI lock variants. For any stroke over 300mm, guide the load to prevent rod bending and side-load wear.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI80X205S
- ✓ 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 SI80X205S FAQ
Yes, the SI80X205S is discontinued. The direct replacement is the AirTAC SAI80X205S. It is dimensionally interchangeable per ISO 15552, matching the 80mm bore, 205mm stroke, 513kgf max force, G3/8 port, and mounting interface.
The 80mm bore uses a G3/8 air port. Force output is 2513N push and 2268N pull at 0.5MPa, 3518N push at 0.7MPa, 4523N push at 0.9MPa, and a theoretical maximum of 513kgf at 1.0MPa. Operating speed is 30-800mm/s.
Related AirTAC SAI Cylinders
Request a Quote for the SAI80X205S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI80X205S replacement — usually within 7-8 hours.