This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI80X390, 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 SI80X390
The AirTAC SI80 Standard Air Cylinder SI80X390 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø80mm bore and 390mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI80X390, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ80 mm
- Stroke390 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAI80X390
- 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 SI80X390
The AirTAC SI80X390 is a discontinued double-acting ISO 15552 profile cylinder with an 80mm bore and 390mm stroke. Delivering 2513N push force at 0.5MPa via a G3/8 port, it is directly replaced by the SAI80X390. This direct upgrade shares the exact ISO 15552 mounting interface, bore, stroke, force and accessories, fitting existing fixtures perfectly.
The SAI upgrade features a revised piston seal with two Y-shaped one-way elements for low start-up pressure and long life. This SKU lacks the -S magnet, so it cannot accept CS1-B/DS1-B sensors. For load holding, note the air cushion only decelerates; use SAIL or BSAI lock variants.
Airtac SI80 Standard Air Cylinder SI80X390 Technical Specifications
| Model | Airtac SI80 Standard Air Cylinder SI80X390 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI80X390 |
| Bore size | Ø80 mm |
| Stroke | 390 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 SAI80X390 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 SAI80X390 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 SI80X390
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 80 | Bore size in mm. |
| ×390 | 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 SI80X390 Is Used
Package Diverting
Drives diverting arms on high-throughput packaging lines, utilizing the 390mm stroke to push heavy cartons cleanly off the main belt.
Pallet Handling
Actuates large pallet stops and positioning gates in automated storage systems, providing robust 2513N force at 0.5MPa.
Material Pressing
Applies downward clamping pressure for light material assembly and pressing tasks, safely handling loads up to 1508N.
Replacing the Airtac SI80 Standard Air Cylinder SI80X390 with the SAI80X390
To replace the SI80X390, order the SAI80X390. Verify the ISO 15552 mounting interface, the G3/8 port, the M20x1.5 rod thread, and your specific mounting accessory (LB, FA, TC, etc.). Because this SKU lacks the -S magnet, it cannot support position sensing; if needed, order an SAI with S. For sizing, neighboring bores offer different forces: a 63mm bore yields 1559N push at 0.5MPa, while a 100mm bore yields 3927N. Since the 390mm stroke is long, use an external guide to prevent rod bending and side-load damage. A plain cylinder drifts on air loss; for held loads, specify the SAIL lock or BSAI clamp-lock variant, or use an external pilot check valve.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI80X390
- ✓ 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 SI80X390 FAQ
Yes, the SI80X390 is discontinued. The direct replacement is the AirTAC SAI80X390. It shares the same ISO 15552 mounting interface, 80mm bore, 390mm stroke, output force, and G3/8 port, dropping straight into existing fixtures.
The 80mm bore uses a G3/8 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.
Request a Quote for the SAI80X390
Send us the quantity and destination. We confirm price, stock and lead time on the SAI80X390 replacement — usually within 7-8 hours.