This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI80X340S, 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 SI80X340S
The AirTAC SI80 Standard Air Cylinder SI80X340S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø80mm bore and 340mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI80X340S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ80 mm
- Stroke340 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAI80X340S
- 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 SI80X340S
The AirTAC SI80X340S is a discontinued double-acting ISO 15552 profile cylinder featuring a 340 mm stroke and 80 mm bore. It delivers 2513 N push force at 0.5 MPa through a G3/8 port. AirTAC replaced this legacy unit with the SAI80X340S, a direct replacement retaining the exact ISO 15552 mounting interface, stroke, force, and port size.
The SAI upgrade introduces an upgraded piston seal with two Y-shaped one-way elements for low start-up pressure and extended life. The SAI family also adds SAIL, SAIF, and BSAI lock or valve variants absent in the SI line. Your -S suffix indicates a piston magnet for legacy CS1-B/DS1-B sensors.
Airtac SI80 Standard Air Cylinder SI80X340S Technical Specifications
| Model | Airtac SI80 Standard Air Cylinder SI80X340S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI80X340S |
| Bore size | Ø80 mm |
| Stroke | 340 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 SAI80X340S 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 SAI80X340S 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 SI80X340S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 80 | Bore size in mm. |
| ×340 | 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 SI80X340S Is Used
Pallet Diversion
Actuates heavy lane diverters on packaging lines, utilizing the 2513 N push force to shift loaded pallets smoothly at 0.5 MPa operating pressure.
Press Ejection
Ejects formed metal components from stamping presses, relying on the 340 mm stroke to clear the tooling area completely before the next cycle.
Replacing the Airtac SI80 Standard Air Cylinder SI80X340S with the SAI80X340S
To replace the SI80X340S, order the SAI80X340S. Verify your ISO 15552 mounting hardware (LB, FA, TC, etc.), the G3/8 port threads, and the M20x1.5 rod end. The -S magnet supports CS1-B/DS1-B switches, though the SAI uses current AirTAC sensors. If you need more force than the 2513 N push at 0.5 MPa, step up to a 100 mm bore; if less is required, a 63 mm bore provides 1559 N. Because the 340 mm stroke exceeds 300 mm, use an external guide to prevent rod bending and side-load damage. Remember, a standard cylinder drifts without live air; for load holding, specify the SAIL lock variant, BSAI clamp-lock, or an external pilot check valve.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI80X340S
- ✓ 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 SI80X340S FAQ
Yes, the SI80X340S is discontinued. The direct replacement is the AirTAC SAI80X340S. It shares the identical ISO 15552 mounting interface, 80 mm bore, 340 mm stroke, output force, and G3/8 port, fitting existing fixtures perfectly while offering an upgraded piston seal.
At 0.5 MPa, it provides 2513 N push and 2268 N pull force. At 0.7 MPa it pushes 3518 N, and 4523 N at 0.9 MPa. The theoretical max force is 513 kgf at 1.0 MPa. It operates at 30-800 mm/s, uses a G3/8 port, and features a 36 mm adjustable air cushion at both ends.
Related AirTAC SAI Cylinders
Request a Quote for the SAI80X340S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI80X340S replacement — usually within 7-8 hours.