This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI80X400H, 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 SI80X400H
The AirTAC SI80 Standard Air Cylinder SI80X400H is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø80mm bore and 400mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI80X400H, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ80 mm
- Stroke400 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAI80X400H
- 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 SI80X400H
The AirTAC SI80X400H is a discontinued double-acting ISO 15552 profile cylinder with an 80mm bore and 400mm stroke. Generating 2513N push force at 0.5MPa, it features a G3/8 port, M20x1.5 rod thread, and Viton H high-temperature seals (0-150 C). The direct replacement is the SAI80X400H, matching the exact ISO 15552 mounting interface, force, and porting.
The SAI upgrade introduces an upgraded piston seal with two Y-shaped one-way elements for low start-up pressure and long life. This specific SKU lacks a magnet and cannot accept position sensors. For load-holding needs the SI line lacked, explore the SAIL or BSAI lock variants.
Airtac SI80 Standard Air Cylinder SI80X400H Technical Specifications
| Model | Airtac SI80 Standard Air Cylinder SI80X400H |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI80X400H |
| Bore size | Ø80 mm |
| Stroke | 400 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 SAI80X400H 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 SAI80X400H 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 SI80X400H
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 80 | Bore size in mm. |
| ×400 | 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 SI80X400H Is Used
Injection Mold Ejection
Drives heavy ejector plates in high-temperature molding cells, utilizing the Viton H seal and 2513N force to reliably strip finished parts.
Pallet Diversion
Extends 400mm to push heavy product pallets off a main conveyor line, requiring external guides to manage the long stroke side-load.
Replacing the Airtac SI80 Standard Air Cylinder SI80X400H with the SAI80X400H
To replace the discontinued SI80X400H, order the SAI80X400H. Verify your ISO 15552 mounting accessories (LB, FA, CA, TC), the G3/8 port, and the 400mm stroke. Because this is a 400mm stroke, use external guides to prevent rod bending and side-load wear. This SKU has no magnet (-S), so it cannot support CS1-B/DS1-B sensors; order a magnet-equipped SAI if sensing is needed. The plain cylinder does not hold load on air loss; use an external rod lock or pilot check valve for holding. If downsizing, a 63mm bore yields 1559N push; if upsizing, a 100mm bore yields 3927N at 0.5MPa. The Viton H seal supports 0-150 C.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI80X400H
- ✓ 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 SI80X400H FAQ
Yes, the SI80X400H is discontinued. The direct replacement is the SAI80X400H. It is dimensionally interchangeable per ISO 15552, matching the 80mm bore, 400mm stroke, G3/8 port, and mounting interface.
The 80mm bore uses a G3/8 port and features a 25mm rod. It generates 2513N push and 2268N pull at 0.5MPa, 3518N push at 0.7MPa, and a theoretical max of 513 kgf at 1.0MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI80X400H
Send us the quantity and destination. We confirm price, stock and lead time on the SAI80X400H replacement — usually within 7-8 hours.