This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI80BX510S, 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 SI80BX510S
The AirTAC SI80 Standard Air Cylinder SI80BX510S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø80mm bore and 510mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI80BX510S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ80 mm
- Stroke510 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAI80BX510S
- 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 SI80BX510S
The AirTAC SI80BX510S is a discontinued double-acting ISO 15552 profile cylinder with an 80mm bore, 510mm stroke, and SUS304 stainless piston rod. Delivering 2513 N push force at 0.5 MPa, it is replaced by the SAI80BX510S. This direct upgrade matches the G3/8 port, M20x1.5 thread, and mounting interface exactly.
The SAI revision upgrades the piston seal to two Y-shaped one-way elements for low start-up pressure and long life. The original -S magnet supports legacy CS1-B/DS1-B sensors, while the SAI family introduces SAIL lock and BSAI clamp variants absent in the SI line.
Airtac SI80 Standard Air Cylinder SI80BX510S Technical Specifications
| Model | Airtac SI80 Standard Air Cylinder SI80BX510S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI80BX510S |
| Bore size | Ø80 mm |
| Stroke | 510 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 SAI80BX510S 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 SAI80BX510S 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 SI80BX510S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 80 | Bore size in mm. |
| ×510 | 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 SI80BX510S Is Used
Long-Stroke Diverting
Pushes heavy pallets across a 510mm transfer zone using the 2513 N push force, guided externally to prevent rod bending.
Washdown Actuation
Shifts testing fixtures in humid environments using the SUS304 rod option, with CS1-B/DS1-B sensors tracking position.
Replacing the Airtac SI80 Standard Air Cylinder SI80BX510S with the SAI80BX510S
To replace the SI80BX510S, order the SAI80BX510S to get the identical ISO 15552 mounting interface, 80mm bore, 510mm stroke, G3/8 port, and SUS304 rod. If sizing up or down, neighboring bores are 63mm (1559 N push @0.5 MPa) and 100mm (3927 N push @0.5 MPa). Because this is a 510mm stroke, prevent rod bending by guiding the load externally to avoid side-load forces. A plain cylinder drifts on air loss—the cushion only decelerates—so use the SAIL or BSAI lock variant, or an external pilot check valve, to hold loads safely.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI80BX510S
- ✓ 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 SI80BX510S FAQ
Yes, the SI80BX510S is discontinued. The direct replacement is the SAI80BX510S, which shares the same ISO 15552 mounting interface, 80mm bore, 510mm stroke, force, G3/8 port, and SUS304 rod.
The G3/8 port cylinder delivers 2513 N push and 2268 N pull at 0.5 MPa, 3518 N push at 0.7 MPa, and a theoretical max of 513 kgf at 1.0 MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI80BX510S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI80BX510S replacement — usually within 7-8 hours.