This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI80X78, 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 SI80X78
The AirTAC SI80 Standard Air Cylinder SI80X78 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø80mm bore and 78mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI80X78, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ80 mm
- Stroke78 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAI80X78
- 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 SI80X78
The AirTAC SI80X78 is a discontinued double-acting ISO 15552 profile cylinder with an 80 mm bore and 78 mm stroke. It delivers 2513 N push and 2268 N pull at 0.5 MPa, operating at 30-800 mm/s through a G3/8 port. Because this legacy unit is end-of-life, you should order the SAI80X78 direct replacement. The SAI retains the exact ISO 15552 mounting interface, bore, stroke, output force, port size and accessories, fitting existing fixtures perfectly.
The SAI upgrade features a new piston seal with two Y-shaped one-way elements for low start-up pressure and long life. Note this specific SI80X78 SKU lacks a magnet (-S), so it cannot accept CS1-B or DS1-B sensors. If you need load holding on air loss, the cushion only decelerates; consider the SAIL lock or BSAI clamp-lock variants.
Airtac SI80 Standard Air Cylinder SI80X78 Technical Specifications
| Model | Airtac SI80 Standard Air Cylinder SI80X78 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI80X78 |
| Bore size | Ø80 mm |
| Stroke | 78 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 SAI80X78 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 SAI80X78 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 SI80X78
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 80 | Bore size in mm. |
| ×78 | 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 SI80X78 Is Used
Mid-Tonnage Pressing
Applies the 2513 N push force at 0.5 MPa for seating bearings, stamping light sheet metal, or clinching components in automated assembly lines.
Package Diversion
Drives 78 mm stroke sorter gates or pusher arms to redirect heavy cartons on material handling conveyors without overshooting.
Pallet Lift Stops
Acts as a robust physical stop or indexing pin for pallets entering lift stations, absorbing kinetic energy via its 36 mm adjustable air cushion.
Replacing the Airtac SI80 Standard Air Cylinder SI80X78 with the SAI80X78
To replace the discontinued SI80X78, order the SAI80X78. Confirm the ISO 15552 mounting accessory (LB, FA, CA, TC) and the G3/8 port thread (PT, G or NPT) match your manifold. This non-magnetic SKU cannot take a sensor; if position feedback is needed, select an SAI80X78S and use current AirTAC switches. Sizing both ways: the 80 mm bore gives 2513 N push at 0.5 MPa, while the neighbouring 63 mm bore offers 1559 N. A plain cylinder drifts on air loss—the cushion only decelerates—so for holding use the SAIL or BSAI variant, or an external pilot check valve.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI80X78
- ✓ 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 SI80X78 FAQ
Yes, the SI80X78 is discontinued. The direct replacement is the AirTAC SAI80X78. It is dimensionally interchangeable per ISO 15552, keeping the same 80 mm bore, 78 mm stroke, G3/8 port, 2513 N force and mounting interface.
The 80 mm bore uses a G3/8 port. It generates 2513 N push and 2268 N pull at 0.5 MPa, 3518 N push at 0.7 MPa, and a theoretical maximum of 513 kgf at 1.0 MPa.
Request a Quote for the SAI80X78
Send us the quantity and destination. We confirm price, stock and lead time on the SAI80X78 replacement — usually within 7-8 hours.