This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI80X305SFB, 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 SI80X305SFB
The AirTAC SI80 Standard Air Cylinder SI80X305SFB is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø80mm bore and 305mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI80X305SFB, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ80 mm
- Stroke305 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAI80X305SFB
- 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 SI80X305SFB
The AirTAC SI80X305SFB is a discontinued double-acting ISO 15552 profile cylinder with a 305 mm stroke and FB flange mounting. Delivering 2513 N push and 2268 N pull at 0.5 MPa, it features a built-in piston magnet for CS1-B/DS1-B switches. AirTAC replaced this EOL unit with the SAI80X305SFB, a direct sharing the exact 80 mm bore, stroke, output force, G3/8 port and ISO 15552 mounting interface.
The SAI upgrade introduces a two Y-shaped one-way piston seal for low start-up pressure and extended life. For load-holding, note that a plain cylinder drifts on air loss—the cushion only decelerates—so use an external rod lock or pilot check valve.
Airtac SI80 Standard Air Cylinder SI80X305SFB Technical Specifications
| Model | Airtac SI80 Standard Air Cylinder SI80X305SFB |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI80X305SFB |
| Bore size | Ø80 mm |
| Stroke | 305 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 SAI80X305SFB 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 SAI80X305SFB 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 SI80X305SFB
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 80 | Bore size in mm. |
| ×305 | 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 SI80X305SFB Is Used
Pallet Diversion
Actuates heavy lane diverters on packaging lines, utilizing the 2513 N push force at 0.5 MPa to shift loaded pallets smoothly.
Vertical Lift Gate
Raises and lowers access gates using the 305 mm stroke, safely handling loads up to the 128 kg vertical lift capacity.
Press Ejection
Ejects formed metal parts from press beds, relying on adjustable end cushions to decelerate the 80 mm bore at high speeds.
Replacing the Airtac SI80 Standard Air Cylinder SI80X305SFB with the SAI80X305SFB
To replace the SI80X305SFB, order the SAI80X305SFB direct. Verify the ISO 15552 FB flange interface, 80 mm bore, 305 mm stroke, G3/8 port (PT/G/NPT thread options) and the -S magnet. If you need to size up or down, neighbouring bores are 63 mm (1559 N [email protected]) and 100 mm (3927 N [email protected]). For locked loads, the plain SAI drifts without live air, so specify the SAIL or BSAI lock variant, or an external pilot check valve. Because the 305 mm stroke is long, use an external guide to prevent rod bending and side-load wear.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI80X305SFB
- ✓ 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 SI80X305SFB FAQ
Yes, the SI80X305SFB is discontinued. The direct replacement is the SAI80X305SFB. It shares the identical ISO 15552 mounting interface, 80 mm bore, 305 mm stroke, output force, G3/8 port and FB flange, fitting existing fixtures perfectly.
The G3/8 port feeds a 25 mm rod. It provides 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 max of 513 kgf at 1.0 MPa. Operating speed is 30-800 mm/s.
Related AirTAC SAI Cylinders
Request a Quote for the SAI80X305SFB
Send us the quantity and destination. We confirm price, stock and lead time on the SAI80X305SFB replacement — usually within 7-8 hours.