This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI80BX155S, 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 SI80BX155S
The AirTAC SI80 Standard Air Cylinder SI80BX155S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø80mm bore and 155mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI80BX155S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ80 mm
- Stroke155 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAI80BX155S
- 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 SI80BX155S
The AirTAC SI80BX155S is a discontinued double-acting ISO 15552 profile cylinder with an 80 mm bore, 155 mm stroke, and a SUS304 stainless steel rod. Delivering 2513 N push force at 0.5 MPa, it is replaced direct by the SAI80BX155S. The SAI upgrade retains the G3/8 port and M20x1.5 thread but uses an upgraded piston seal (two Y-shaped one-way elements) for lower start-up pressure and longer life.
This -S model includes a piston magnet for legacy CS1-B/DS1-B sensors. Note that standard cylinders drift without live air; for load holding, use an external rod lock or the SAIL/BSAI lock variants.
Airtac SI80 Standard Air Cylinder SI80BX155S Technical Specifications
| Model | Airtac SI80 Standard Air Cylinder SI80BX155S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI80BX155S |
| Bore size | Ø80 mm |
| Stroke | 155 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 SAI80BX155S 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 SAI80BX155S 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 SI80BX155S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 80 | Bore size in mm. |
| ×155 | 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 SI80BX155S Is Used
Heavy Material Diversion
Handles robust diverting arms on packaging lines where the 2513 N push force reliably pushes heavy cartons onto secondary chutes.
Stainless Rod Clamping
The SUS304 rod option excels in washdown clamping stations, resisting moisture corrosion while securing parts for machining.
Pallet Lift Stops
Acts as a heavy-duty stopper in automated storage systems, using its 128 kg vertical lift capacity to arrest moving pallets safely.
Replacing the Airtac SI80 Standard Air Cylinder SI80BX155S with the SAI80BX155S
To replace the discontinued SI80BX155S, order the SAI80BX155S. Verify the ISO 15552 mounting interface, 80 mm bore, 155 mm stroke, G3/8 port, and your specific mounting accessories. The -B rod is SUS304 stainless steel, and the -S denotes a magnet for CS1-B/DS1-B switches (the SAI uses current AirTAC switches). If sizing up or down, neighbouring bores are 63 mm (1559 N push @0.5 MPa) and 100 mm (3927 N push @0.5 MPa). A plain cylinder does not hold load without air; the cushion only decelerates. For secure holding, consider the SAIL or BSAI lock variants, or an external pilot check valve.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI80BX155S
- ✓ 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 SI80BX155S FAQ
Yes, the AirTAC SI80BX155S is discontinued. The direct replacement is the SAI80BX155S. It shares the exact same ISO 15552 mounting interface, 80 mm bore, 155 mm stroke, output force, and G3/8 port, fitting existing fixtures perfectly while upgrading the piston seal.
The 80 mm bore features 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 it is 4523 N. The theoretical maximum force is 513 kgf at 1.0 MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI80BX155S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI80BX155S replacement — usually within 7-8 hours.