This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI80BX320S, 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 SI80BX320S
The AirTAC SI80 Standard Air Cylinder SI80BX320S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø80mm bore and 320mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI80BX320S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ80 mm
- Stroke320 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAI80BX320S
- 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 SI80BX320S
The AirTAC SI80BX320S is a discontinued double-acting ISO 15552 profile cylinder with an 80 mm bore and 320 mm stroke. It delivers 2513 N push and 2268 N pull at 0.5 MPa through a G3/8 port. The direct replacement is the SAI80BX320S, matching the interface, force, and mounting. This unit features a SUS304 stainless piston rod (-B) and a magnet (-S) for CS1-B/DS1-B sensors.
The SAI upgrade introduces a two Y-shaped one-way piston seal for low start-up pressure and long life. Note that plain cylinders drift without live air; use an external rod lock or the SAIL/BSAI lock variants for holding.
Airtac SI80 Standard Air Cylinder SI80BX320S Technical Specifications
| Model | Airtac SI80 Standard Air Cylinder SI80BX320S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI80BX320S |
| Bore size | Ø80 mm |
| Stroke | 320 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 SAI80BX320S 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 SAI80BX320S 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 SI80BX320S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 80 | Bore size in mm. |
| ×320 | 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 SI80BX320S Is Used
Diverting Heavy Goods
Actuates routing arms on packaging lines, using the 2513 N push force to pivot heavy pallets reliably at high cycle speeds.
Stainless Rod Clamping
The SUS304 rod (-B) resists moisture in washdown clamping stations, while the magnet (-S) confirms end-of-stroke position.
Replacing the Airtac SI80 Standard Air Cylinder SI80BX320S with the SAI80BX320S
To replace the SI80BX320S, order the SAI80BX320S. Confirm the ISO 15552 mounting interface, the 80 mm bore, 320 mm stroke, G3/8 port, and your specific mounting accessory. The -B denotes a SUS304 stainless rod, and -S means a magnet is present for CS1-B/DS1-B switches (the SAI uses current AirTAC switches). Sizing both ways: a 63 mm bore gives 1559 N push at 0.5 MPa, while a 100 mm bore gives 3927 N. Because stroke is 320 mm, add external guides to prevent rod bending under side loads. For load holding on air loss, specify a pilot check valve or the SAIL/BSAI lock variant, as cushions only decelerate.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI80BX320S
- ✓ 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 SI80BX320S FAQ
Yes, the SI80BX320S is discontinued. The direct replacement is the SAI80BX320S. It features the same ISO 15552 mounting interface, 80 mm bore, 320 mm stroke, output force, and G3/8 port, fitting existing fixtures perfectly.
This double-acting cylinder uses a G3/8 port. At 0.5 MPa it provides 2513 N push and 2268 N pull. At 0.7 MPa push is 3518 N, and 4523 N at 0.9 MPa. The theoretical maximum force is 513 kgf at 1.0 MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI80BX320S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI80BX320S replacement — usually within 7-8 hours.