This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI80BX120S, 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 SI80BX120S
The AirTAC SI80 Standard Air Cylinder SI80BX120S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø80mm bore and 120mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI80BX120S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ80 mm
- Stroke120 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAI80BX120S
- 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 SI80BX120S
The AirTAC SI80BX120S is a discontinued double-acting ISO 15552 profile cylinder featuring a SUS304 stainless steel rod and a piston magnet. Built for a 120 mm stroke, it delivers 2513 N push force at 0.5 MPa through a G3/8 port. The direct replacement is the SAI80BX120S, matching the bore, stroke, force, and ISO 15552 mounting interface.
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 and BSAI lock variants absent in the SI line.
Airtac SI80 Standard Air Cylinder SI80BX120S Technical Specifications
| Model | Airtac SI80 Standard Air Cylinder SI80BX120S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI80BX120S |
| Bore size | Ø80 mm |
| Stroke | 120 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 SAI80BX120S 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 SAI80BX120S 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 SI80BX120S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 80 | Bore size in mm. |
| ×120 | 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 SI80BX120S Is Used
Stainless Rod Clamping
Leverages the SUS304 rod for corrosion resistance while providing 2513 N of clamping force in washdown manufacturing environments.
Package Diverting
Uses the 120 mm stroke and integrated magnet to actuate routing gates on high-speed packaging conveyors with precise end-position sensing.
Pallet Stops
Deploys the 36 mm adjustable air cushions to decelerate heavy 128 kg vertical loads smoothly at stroke end without mechanical impact.
Replacing the Airtac SI80 Standard Air Cylinder SI80BX120S with the SAI80BX120S
To replace the SI80BX120S, order the SAI80BX120S. Verify the ISO 15552 mounting fixture, the G3/8 port, the M20x1.5 rod thread, and the -S magnet for CS1-B/DS1-B switches (the SAI uses current AirTAC switches). If sizing up or down, adjacent bores are 63 mm (1559 N push @0.5 MPa) and 100 mm (3927 N push @0.5 MPa). Note that a plain cylinder drifts on air loss; the cushion only decelerates. For load holding, use an external rod lock, pilot check valve, or the SAIL/BSAI lock variant.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI80BX120S
- ✓ 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 SI80BX120S FAQ
Yes, the SI80BX120S is discontinued. The direct replacement is the SAI80BX120S. It is dimensionally interchangeable per ISO 15552, retaining the same 80 mm bore, 120 mm stroke, 513 kgf max force, G3/8 port, and mounting interface.
This double-acting cylinder uses a G3/8 air port. It provides 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 maximum force of 513 kgf at 1.0 MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI80BX120S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI80BX120S replacement — usually within 7-8 hours.