This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI80BX300S, 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 SI80BX300S
The AirTAC SI80 Standard Air Cylinder SI80BX300S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø80mm bore and 300mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI80BX300S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ80 mm
- Stroke300 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAI80BX300S
- 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 SI80BX300S
The AirTAC SI80BX300S is a discontinued double-acting ISO 15552 profile cylinder featuring a 300 mm stroke and a SUS304 stainless steel piston rod. It delivers 2513 N push force at 0.5 MPa. AirTAC replaced this legacy unit with the SAI80BX300S, a direct sharing the same bore, stroke, 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 longevity. The original -S magnet supports CS1-B/DS1-B sensors, while the SAI uses current AirTAC switches.
Airtac SI80 Standard Air Cylinder SI80BX300S Technical Specifications
| Model | Airtac SI80 Standard Air Cylinder SI80BX300S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI80BX300S |
| Bore size | Ø80 mm |
| Stroke | 300 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 SAI80BX300S 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 SAI80BX300S 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 SI80BX300S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 80 | Bore size in mm. |
| ×300 | 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 SI80BX300S Is Used
Pallet Stopper Gate
Acts as a robust pneumatic stop in pallet handling systems, using its 128 kg vertical lift margin to manage loads while resisting corrosion via the SUS304 rod.
Machine Tool Clamping
Secures heavy cast components during CNC machining, relying on the 3518 N push force at 0.7 MPa and external guides to handle the 300 mm stroke safely.
Replacing the Airtac SI80 Standard Air Cylinder SI80BX300S with the SAI80BX300S
To replace the SI80BX300S, order the SAI80BX300S and verify your ISO 15552 mounting interface, G3/8 port thread, and M20x1.5 rod-end connection. The -B code indicates a SUS304 stainless rod for corrosion resistance, and -S confirms the piston magnet for switch sensing. When sizing both ways, a neighbouring 63 mm bore yields 1559 N push at 0.5 MPa, whereas a 100 mm bore provides 3927 N. Note that a plain cylinder drifts on air loss since the cushion only decelerates; for load holding, specify an external rod lock, pilot check valve, or the SAIL/BSAI lock variants. Because the 300 mm stroke invites side-load and rod-bending risks, use external guides to prevent premature wear.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI80BX300S
- ✓ 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 SI80BX300S FAQ
Yes, the SI80BX300S is discontinued. The direct replacement is the SAI80BX300S. It shares the identical ISO 15552 mounting interface, 80 mm bore, 300 mm stroke, G3/8 port, and output force, fitting directly into existing fixtures.
The bore features a G3/8 air port. Force output is 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, with a theoretical max of 513 kgf at 1.0 MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI80BX300S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI80BX300S replacement — usually within 7-8 hours.