This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI80BX185S, 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 SI80BX185S
The AirTAC SI80 Standard Air Cylinder SI80BX185S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø80mm bore and 185mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI80BX185S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ80 mm
- Stroke185 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAI80BX185S
- 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 SI80BX185S
The AirTAC SI80BX185S is a discontinued double-acting ISO 15552 profile cylinder with an 80mm bore, 185mm stroke, and a SUS304 stainless steel rod. Delivering 2513 N push force at 0.5 MPa, it is replaced by the SAI80BX185S. This direct successor matches the exact G3/8 port, M20x1.5 thread, and ISO 15552 mounting interface.
The SAI upgrade features a two Y-shaped one-way piston seal for low start-up pressure and long life. The -S magnet works with legacy CS1-B/DS1-B sensors, while the SAI family adds SAIL lock and BSAI clamp variants.
Airtac SI80 Standard Air Cylinder SI80BX185S Technical Specifications
| Model | Airtac SI80 Standard Air Cylinder SI80BX185S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI80BX185S |
| Bore size | Ø80 mm |
| Stroke | 185 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 SAI80BX185S 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 SAI80BX185S 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 SI80BX185S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 80 | Bore size in mm. |
| ×185 | 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 SI80BX185S Is Used
Product Diversion
Drives heavy lane diverters on packaging lines, using the 2513 N thrust to push cartons smoothly onto auxiliary belts.
Press Fixture
Applies consistent downward clamping force in assembly jigs, with the SUS304 rod resisting moisture in washdown areas.
Pallet Handling
Actuates stops and lifts within automated storage systems, where the 128 kg vertical lift capacity handles loaded trays securely.
Replacing the Airtac SI80 Standard Air Cylinder SI80BX185S with the SAI80BX185S
To replace the SI80BX185S, order the SAI80BX185S to retain the identical ISO 15552 mounting interface, 80mm bore, 185mm stroke, G3/8 port, and SUS304 stainless rod. If downgrading to a 63mm bore, force drops to 1559 N push at 0.5 MPa; upgrading to 100mm yields 3927 N. The 185mm stroke is standard (max 1500mm), so no side-load guide is strictly required, but always verify alignment. Because this is a plain cylinder, air loss causes piston drift—the cushion only decelerates. For load holding, use an external pilot check valve or explore the SAIL air-released lock or BSAI clamp-lock variants.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI80BX185S
- ✓ 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 SI80BX185S FAQ
Yes, the SI80BX185S is discontinued. The direct replacement is the SAI80BX185S. It provides a dimensionally interchangeable ISO 15552 mounting interface, matching the 80mm bore, 185mm stroke, G3/8 port, and output force, so it fits existing fixtures perfectly.
The bore is 80mm with 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, and a theoretical max of 513 kgf at 1.0 MPa. It operates at 30-800 mm/s.
Related AirTAC SAI Cylinders
Request a Quote for the SAI80BX185S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI80BX185S replacement — usually within 7-8 hours.