This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI80BX500S, 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 SI80BX500S
The AirTAC SI80 Standard Air Cylinder SI80BX500S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø80mm bore and 500mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI80BX500S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ80 mm
- Stroke500 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAI80BX500S
- 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 SI80BX500S
The AirTAC SI80BX500S is a discontinued double-acting ISO 15552 profile cylinder featuring a SUS304 stainless piston rod and a 500 mm stroke. Delivering 2513 N push force at 0.5 MPa with a G3/8 port, it is replaced by the SAI80BX500S. This direct successor matches the exact ISO 15552 mounting interface, bore, and output force.
The SAI upgrade introduces a two Y-shaped one-way piston seal for low start-up pressure and long life. The SAI family also adds SAIL, SAIF, and BSAI lock variants the SI lacked.
Airtac SI80 Standard Air Cylinder SI80BX500S Technical Specifications
| Model | Airtac SI80 Standard Air Cylinder SI80BX500S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI80BX500S |
| Bore size | Ø80 mm |
| Stroke | 500 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 SAI80BX500S 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 SAI80BX500S 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 SI80BX500S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 80 | Bore size in mm. |
| ×500 | 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 SI80BX500S Is Used
Long-Stroke Diversion
Drives large packages across 500 mm gaps on packaging lines where the 2513 N push force at 0.5 MPa easily overcomes transfer friction.
Fixture Actuation
Positions large welding fixtures requiring the robust 80 mm bore and 4523 N output at 0.9 MPa to seat heavy tooling firmly.
Replacing the Airtac SI80 Standard Air Cylinder SI80BX500S with the SAI80BX500S
To replace the SI80BX500S, order the SAI80BX500S. Confirm the ISO 15552 mounting interface, 80 mm bore, 500 mm stroke, G3/8 port (PT/G/NPT), and mounting accessory. The -S magnet enables CS1-B/DS1-B sensors; the SAI uses current AirTAC switches. The -B rod is SUS304 stainless. Sizing both ways: neighbour bores are 63 mm (1559 N [email protected]) and 100 mm (3927 N [email protected]). A plain cylinder drifts without air; use an external rod lock, pilot check valve, or SAIL/BSAI variant to hold loads. For the 500 mm stroke, use external guides to prevent rod bending and side loads.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI80BX500S
- ✓ 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 SI80BX500S FAQ
Yes, the SI80BX500S is discontinued. The direct replacement is the SAI80BX500S. It shares the same ISO 15552 mounting interface, 80 mm bore, 500 mm stroke, G3/8 port, and output force, fitting existing fixtures perfectly.
It features a G3/8 air port. The force ratings are: push 2513 N and pull 2268 N at 0.5 MPa, push 3518 N at 0.7 MPa, push 4523 N at 0.9 MPa, and a theoretical maximum of 513 kgf at 1.0 MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI80BX500S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI80BX500S replacement — usually within 7-8 hours.