This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI80BX185, 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 SI80BX185
The AirTAC SI80 Standard Air Cylinder SI80BX185 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 SAI80BX185, 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 → SAI80BX185
- 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 SI80BX185
The AirTAC SI80BX185 is a discontinued double-acting ISO 15552 profile cylinder with an 80mm bore, 185mm stroke, and a SUS304 stainless steel rod. It delivers 2513 N push and 2268 N pull at 0.5 MPa. AirTAC replaced this EOL unit with the SAI80BX185, a direct sharing the same ISO 15552 mounting interface, bore, output force, G3/8 port, and stroke. Because 185mm is not a standard stroke increment, it is flagged as nonstandard.
The SAI upgrade features a new piston seal with two Y-shaped one-way elements for low start-up pressure and long life. For sensing, note this specific SKU lacks a magnet and cannot accept a CS1-B/DS1-B switch.
Airtac SI80 Standard Air Cylinder SI80BX185 Technical Specifications
| Model | Airtac SI80 Standard Air Cylinder SI80BX185 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI80BX185 |
| 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 SAI80BX185 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 SAI80BX185 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 SI80BX185
| 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 SI80BX185 Is Used
Stainless Rod Clamping
Ideal for packaging or washdown stations where the SUS304 rod resists corrosion while providing 2513 N of clamping thrust.
Press Fixture Actuation
Drops directly into existing ISO 15552 fixture holes to actuate medium-duty press assemblies using the G3/8 air port.
Replacing the Airtac SI80 Standard Air Cylinder SI80BX185 with the SAI80BX185
To replace the SI80BX185, order the SAI80BX185. Confirm the ISO 15552 mounting interface, the 80mm bore, the 185mm stroke, the G3/8 port (available in PT, G, or NPT), and your mounting accessory (LB, FA, FB, CA, CB, TC, etc.). Because this SKU has no -S suffix, it lacks a magnet and cannot host a sensor; if position detection is needed, order an SAI80 equivalent with the magnet option. Size both ways: the neighboring 63mm bore yields 1559 N push at 0.5 MPa, while the 100mm bore yields 3927 N. A plain cylinder does not hold load on air loss—the 36mm adjustable cushions only decelerate near stroke ends. For load holding, use an external pilot check valve, a rod lock, or the SAIL/BSAI lock variants. Since the 185mm stroke is nonstandard, verify delivery times.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI80BX185
- ✓ 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 SI80BX185 FAQ
Yes, the AirTAC SI80BX185 is discontinued. The direct replacement is the SAI80BX185. It shares the identical ISO 15552 mounting interface, 80mm bore, 185mm stroke, output force, and G3/8 port, fitting existing fixtures perfectly.
This double-acting cylinder uses a G3/8 port, an M20x1.5 rod thread, and 36mm adjustable cushions. It operates at 30-800 mm/s. Force ratings are: 2513 N push and 2268 N pull at 0.5 MPa, 3518 N push at 0.7 MPa, and a maximum theoretical force of 513 kgf at 1.0 MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI80BX185
Send us the quantity and destination. We confirm price, stock and lead time on the SAI80BX185 replacement — usually within 7-8 hours.