This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI80BX20, 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 SI80BX20
The AirTAC SI80 Standard Air Cylinder SI80BX20 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø80mm bore and 20mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI80BX20, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ80 mm
- Stroke20 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAI80BX20
- 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 SI80BX20
The AirTAC SI80BX20 is a discontinued double-acting ISO 15552 profile cylinder with an 80 mm bore and 20 mm stroke. It delivers 2513 N push force at 0.5 MPa through a G3/8 port. The direct replacement is the SAI80BX20, which maintains the exact same interface, force, and mounting dimensions.
This SAI upgrade introduces a two Y-shaped one-way piston seal for low start-up pressure and long life. The SI80BX20 features a SUS304 stainless steel rod (B option) for corrosion resistance. Note that this SKU lacks a magnet and cannot accept a sensor.
Airtac SI80 Standard Air Cylinder SI80BX20 Technical Specifications
| Model | Airtac SI80 Standard Air Cylinder SI80BX20 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI80BX20 |
| Bore size | Ø80 mm |
| Stroke | 20 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 SAI80BX20 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 SAI80BX20 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 SI80BX20
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 80 | Bore size in mm. |
| ×20 | 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 SI80BX20 Is Used
Short-Stroke Clamping
Ideal for high-force 2513 N clamping tasks in machining fixtures where a brief 20 mm travel securely locks heavy workpieces in place.
Press Fit Ejection
Provides a robust 2268 N pull force at 0.5 MPa to eject densely assembled parts from tight manufacturing molds using the stainless rod.
Holding Brakes
Acts as a heavy-duty actuator in automated lines, supplying reliable 3518 N push force at 0.7 MPa for positioning heavy industrial loads.
Replacing the Airtac SI80 Standard Air Cylinder SI80BX20 with the SAI80BX20
To replace the discontinued SI80BX20, order the SAI80BX20. Verify your ISO 15552 mounting interface, 80 mm bore, 20 mm stroke, G3/8 port, and M20x1.5 rod thread. Because this is a no-S SKU, it cannot support magnetic sensing; if position feedback is needed, select an SAI80BX20S instead. For sizing down, a 63 mm bore offers 1559 N push at 0.5 MPa; for sizing up, a 100 mm bore provides 3927 N. If you need load holding on air loss, note that the standard cushion only decelerates; use an external pilot check valve or the SAIL/BSAI lock variants.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI80BX20
- ✓ 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 SI80BX20 FAQ
Yes, the AirTAC SI80BX20 is discontinued. The direct replacement is the SAI80BX20. It is dimensionally interchangeable per ISO 15552, retaining the same 80 mm bore, 20 mm stroke, 2513 N force, G3/8 port, and mounting interface to fit existing fixtures directly.
The 80 mm bore uses a G3/8 air port. At 0.5 MPa it provides 2513 N push and 2268 N pull force. At 0.7 MPa push is 3518 N, and at 0.9 MPa push is 4523 N. The theoretical maximum force is 513 kgf at 1.0 MPa.
Request a Quote for the SAI80BX20
Send us the quantity and destination. We confirm price, stock and lead time on the SAI80BX20 replacement — usually within 7-8 hours.