This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI80BX300H, 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 SI80BX300H
The AirTAC SI80 Standard Air Cylinder SI80BX300H 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 SAI80BX300H, 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 → SAI80BX300H
- 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 SI80BX300H
The AirTAC SI80BX300H is a discontinued double-acting ISO 15552 profile cylinder with an extruded aluminum barrel, delivering 2513 N push force at 0.5 MPa. This specific SKU features a SUS304 stainless piston rod (-B) for corrosion resistance and a Viton H seal for high-temperature duty up to 150 C. Because it lacks a -S magnet, it cannot accept position sensors. The direct replacement is the SAI80BX300H, sharing the identical G3/8 port, M20x1.5 thread, 300 mm stroke and ISO 15552 mounting interface.
Upgrading to the SAI80BX300H retains all ratings but introduces an upgraded piston seal with two Y-shaped one-way elements for low start-up pressure and long life. The SAI family also adds lock and valve variants the SI lacked, such as the SAIL and BSAI.
Airtac SI80 Standard Air Cylinder SI80BX300H Technical Specifications
| Model | Airtac SI80 Standard Air Cylinder SI80BX300H |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI80BX300H |
| 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 SAI80BX300H 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 SAI80BX300H 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 SI80BX300H
| 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 SI80BX300H Is Used
High-Temp Forming Press
Ideal for actuating small presses or forming dies in heated environments up to 150 C, leveraging the Viton H seals and SUS304 rod.
Heavy Transfer Diverters
Provides robust 2513 N push force at 0.5 MPa to divert heavy pallets or components on a manufacturing line without magnetic sensing.
Corrosive Washdown Gates
The SUS304 stainless rod excels in washdown or chemically corrosive areas where a standard carbon steel rod would degrade.
Replacing the Airtac SI80 Standard Air Cylinder SI80BX300H with the SAI80BX300H
To replace the discontinued SI80BX300H, order the SAI80BX300H. It is dimensionally interchangeable per ISO 15552 mounting-interface dimensions, matching the 80 mm bore, 300 mm stroke, G3/8 port, and M20x1.5 rod thread. Confirm your mounting accessory (LB, FA, TC, etc.) and note that this no-S SKU cannot support magnetic sensing. Sizing both ways: a 100 mm bore offers 3927 N at 0.5 MPa, while a 63 mm bore provides 1559 N. Because this is a 300 mm stroke, use an external guide to prevent rod-bending side loads. A plain cylinder drifts on air loss; for load holding, use an external rod lock, a pilot check valve, or the SAIL/BSAI lock variant.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI80BX300H
- ✓ 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 SI80BX300H FAQ
Yes, the SI80BX300H is discontinued. The direct replacement is the SAI80BX300H. It is dimensionally interchangeable per ISO 15552, retaining the identical 80 mm bore, 300 mm stroke, 513 kgf max force, G3/8 port, and mounting interface.
The bore is 80 mm with a G3/8 air port. The thrust 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, and a theoretical maximum of 513 kgf at 1.0 MPa. It operates at 30-800 mm/s.
Related AirTAC SAI Cylinders
Request a Quote for the SAI80BX300H
Send us the quantity and destination. We confirm price, stock and lead time on the SAI80BX300H replacement — usually within 7-8 hours.