This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI80X350SH, 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 SI80X350SH
The AirTAC SI80 Standard Air Cylinder SI80X350SH 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 SAI80X350SH, 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 → SAI80X350SH
- 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 SI80X350SH
The AirTAC SI80X350SH is a discontinued double-acting ISO 15552 profile cylinder with a 350 mm stroke. It features an extruded aluminum barrel, a G3/8 port, and delivers 2513 N push force at 0.5 MPa. Because this SI unit is end-of-life, you should order the direct replacement: the SAI80X350SH. It maintains the same ISO 15552 mounting interface, bore, stroke, and output force, fitting existing fixtures perfectly.
The SAI upgrade introduces a two Y-shaped one-way piston seal for low start-up pressure and long life. The H suffix denotes a Viton seal, extending the operating temperature to 0-150 C. The built-in magnet works with legacy CS1-B/DS1-B sensors, while the SAI family adds SAIL and BSAI lock variants the SI lacked.
Airtac SI80 Standard Air Cylinder SI80X350SH Technical Specifications
| Model | Airtac SI80 Standard Air Cylinder SI80X350SH |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI80X350SH |
| 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 SAI80X350SH 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 SAI80X350SH 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 SI80X350SH
| 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 SI80X350SH Is Used
High-Temp Part Ejection
Deploy the 2513 N push force and Viton H seals to eject molded components from heated fixtures, enduring 0-150 C environments without seal degradation.
Long-Stroke Diversion
Utilize the 350 mm stroke to actuate heavy-duty diverter arms on packaging lines, ensuring complete lane changes for larger palletized goods.
Replacing the Airtac SI80 Standard Air Cylinder SI80X350SH with the SAI80X350SH
To replace the discontinued SI80X350SH, order the SAI80X350SH. Verify the ISO 15552 mounting interface, the 80 mm bore, the 350 mm stroke, and the G3/8 port. Keep your existing mounting accessories and confirm the magnet (-S) and high-temp Viton (-H) requirements. The SAI uses current AirTAC switches instead of the legacy CS1-B/DS1-B set. For sizing alternatives, neighboring bores offer different capacities: a 63 mm bore yields 1559 N push at 0.5 MPa, while a 100 mm bore yields 3927 N. Note that a plain cylinder drifts on air loss because the cushion only decelerates; for load holding, use an external rod lock, a pilot check valve, or the SAIL/BSAI lock variants. Finally, for this 350 mm stroke, use external guides to prevent rod bending and side-load wear.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI80X350SH
- ✓ 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 SI80X350SH FAQ
Yes, the SI80X350SH is discontinued. The direct replacement is the SAI80X350SH. It is a true ISO 15552 profile cylinder that matches the original 80 mm bore, 350 mm stroke, 2513 N force, G3/8 port, and mounting interface, fitting existing fixtures without modification.
This double-acting cylinder features a G3/8 air port and an M20x1.5 rod thread. It delivers 2513 N push and 2268 N pull at 0.5 MPa, 3518 N push at 0.7 MPa, 4523 N push at 0.9 MPa, and a theoretical maximum of 513 kgf at 1.0 MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI80X350SH
Send us the quantity and destination. We confirm price, stock and lead time on the SAI80X350SH replacement — usually within 7-8 hours.