This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI80X350H, 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 SI80X350H
The AirTAC SI80 Standard Air Cylinder SI80X350H is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø80mm bore and 350mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI80X350H, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ80 mm
- Stroke350 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAI80X350H
- 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 SI80X350H
The AirTAC SI80X350H is a discontinued double-acting ISO 15552 profile cylinder with a Viton H high-temperature seal (0 to 150 C). Built for a 80 mm bore and 350 mm stroke, it delivers 2513 N push and 2268 N pull at 0.5 MPa through a G3/8 port. The direct replacement is the SAI80X350H, sharing the same interface, force, and mounting.
The SAI upgrade features two Y-shaped one-way piston seals for low start-up pressure and long life. Because this SKU lacks a magnet (-S), it cannot accept CS1-B/DS1-B sensors.
Airtac SI80 Standard Air Cylinder SI80X350H Technical Specifications
| Model | Airtac SI80 Standard Air Cylinder SI80X350H |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI80X350H |
| Bore size | Ø80 mm |
| Stroke | 350 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 SAI80X350H 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 SAI80X350H 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 SI80X350H
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 80 | Bore size in mm. |
| ×350 | 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 SI80X350H Is Used
High-Temp Ejection
Uses the Viton H seal to eject hot moulded components safely in elevated temperature zones without degrading the elastomer.
Heavy Diverting
Leverages the 2513 N push force at 0.5 MPa to push heavy pallets or workpieces onto secondary assembly lines.
Replacing the Airtac SI80 Standard Air Cylinder SI80X350H with the SAI80X350H
To replace the SI80X350H, order the SAI80X350H. Verify the ISO 15552 mounting interface, the 350 mm stroke, the G3/8 port, and your Viton H high-temperature requirement. If you need position sensing, select an SAI80X350HS (with magnet) instead, as this no-S SKU cannot take a switch. For sizing, the neighbouring 63 mm bore yields 1559 N push at 0.5 MPa, while the 100 mm bore yields 3927 N. A plain cylinder drifts on air loss—the cushion only decelerates—so use an external rod lock or pilot check valve for holding, or specify the SAIL or BSAI lock variant. With a 350 mm stroke, use an external guide to prevent rod bending and side-load wear.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI80X350H
- ✓ 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 SI80X350H FAQ
Yes, the SI80X350H is discontinued. The direct replacement is the SAI80X350H. It shares the identical ISO 15552 mounting interface, 80 mm bore, 350 mm stroke, output force, and G3/8 port, fitting directly into existing fixtures.
The 80 mm bore features a G3/8 port and provides 2513 N push and 2268 N pull at 0.5 MPa. It delivers 3518 N push at 0.7 MPa and 4523 N at 0.9 MPa, with a theoretical maximum of 513 kgf at 1.0 MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI80X350H
Send us the quantity and destination. We confirm price, stock and lead time on the SAI80X350H replacement — usually within 7-8 hours.