This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI80X20, 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 SI80X20
The AirTAC SI80 Standard Air Cylinder SI80X20 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø80mm bore and 20mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI80X20, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ80 mm
- Stroke20 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAI80X20
- 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 SI80X20
The AirTAC SI80X20 is a discontinued double-acting ISO 15552 profile cylinder with an 80mm bore and 20mm stroke, delivering 2513N push force at 0.5MPa via a G3/8 port. The direct replacement is the SAI80X20, matching the exact interface, force, and mounting.
The SAI upgrade features a two Y-shaped one-way piston seal for low start-up pressure and long life. As a no-S SKU, it lacks a magnet and cannot take CS1-B/DS1-B sensors.
Airtac SI80 Standard Air Cylinder SI80X20 Technical Specifications
| Model | Airtac SI80 Standard Air Cylinder SI80X20 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI80X20 |
| Bore size | Ø80 mm |
| Stroke | 20 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 SAI80X20 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 SAI80X20 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 SI80X20
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 80 | Bore size in mm. |
| ×20 | 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 SI80X20 Is Used
Short-Stroke Clamping
Ideal for holding heavy castings during machining, utilizing the 2513N push force over a compact 20mm travel.
Product Diversion
Provides robust actuation for deflecting heavy pallets or packages on a high-speed assembly line.
Press Ejection
Delivers rapid 30-800 mm/s ejection of formed parts from heavy-duty stamping presses.
Replacing the Airtac SI80 Standard Air Cylinder SI80X20 with the SAI80X20
To replace the SI80X20, order the SAI80X20 with the identical ISO 15552 mounting interface, 80mm bore, 20mm stroke, G3/8 port, and M20x1.5 rod thread. If you need position sensing, switch to an -S magnet version. For sizing down, a 63mm bore yields 1559N push at 0.5MPa; sizing up to 100mm provides 3927N. Remember, a plain cylinder drifts on air loss—the cushion only decelerates. For held loads, use an external pilot check valve or explore the SAIL or BSAI lock variants.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI80X20
- ✓ 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 SI80X20 FAQ
Yes, the AirTAC SI80X20 is discontinued. The direct replacement is the SAI80X20, which shares the identical ISO 15552 mounting interface, 80mm bore, 20mm stroke, output force, and G3/8 port.
The 80mm bore uses a G3/8 port. It generates 2513N push and 2268N pull at 0.5MPa, 3518N push at 0.7MPa, 4523N push at 0.9MPa, and a maximum theoretical force of 513 kgf at 1.0MPa.
Request a Quote for the SAI80X20
Send us the quantity and destination. We confirm price, stock and lead time on the SAI80X20 replacement — usually within 7-8 hours.