This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI80BX55S, 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 SI80BX55S
The AirTAC SI80 Standard Air Cylinder SI80BX55S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø80mm bore and 55mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI80BX55S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ80 mm
- Stroke55 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAI80BX55S
- 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 SI80BX55S
The AirTAC SI80BX55S is a discontinued double-acting ISO 15552 profile cylinder featuring an extruded aluminum barrel, a SUS304 stainless piston rod, and a built-in magnet. Delivering 2513 N push force at 0.5 MPa, it is replaced by the SAI80BX55S. This direct successor matches the 80 mm bore, 55 mm stroke, G3/8 port, and ISO 15552 mounting interface for seamless fixture integration.
The SAI upgrade utilizes two Y-shaped one-way piston seals for low start-up pressure and extended life. The SI -S magnet pairs with legacy CS1-B/DS1-B switches, while the SAI family introduces SAIL lock and BSAI clamp variants absent in the original line.
Airtac SI80 Standard Air Cylinder SI80BX55S Technical Specifications
| Model | Airtac SI80 Standard Air Cylinder SI80BX55S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI80BX55S |
| Bore size | Ø80 mm |
| Stroke | 55 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 SAI80BX55S 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 SAI80BX55S 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 SI80BX55S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 80 | Bore size in mm. |
| ×55 | 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 SI80BX55S Is Used
Stainless Rod Actuation
Ideal for packaging machinery requiring corrosion resistance, utilizing the SUS304 rod to push 2513 N loads reliably in damp washdown environments.
Short-Stroke Diversion
Provides robust 55 mm stroke diverting force on material handling lines, moving products smoothly with adjustable end cushions.
Pallet Stopper Gate
Functions as a heavy-duty pneumatic stop gate in logistics hubs, holding back pallets safely using the 128 kg vertical lift capacity.
Replacing the Airtac SI80 Standard Air Cylinder SI80BX55S with the SAI80BX55S
To replace the SI80BX55S, order the SAI80BX55S, verifying the ISO 15552 mounting interface, G3/8 port, and M20x1.5 rod thread. The -S magnet and -B SUS304 stainless rod must be specified. Sizing checks: a 63 mm bore yields 1559 N push at 0.5 MPa, while a 100 mm bore yields 3927 N. Note that a plain cylinder drifts on air loss; the cushion only decelerates. For load holding, use an external pilot check valve or the SAIL/BSAI lock variants.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI80BX55S
- ✓ 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 SI80BX55S FAQ
Yes, the SI80BX55S is discontinued. The direct replacement is the SAI80BX55S. It is dimensionally interchangeable per ISO 15552, retaining the same 80 mm bore, 55 mm stroke, G3/8 port, and mounting fixtures.
The G3/8 port bore delivers 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 maximum theoretical force of 513 kgf at 1.0 MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI80BX55S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI80BX55S replacement — usually within 7-8 hours.