This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI80BX55, 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 SI80BX55
The AirTAC SI80 Standard Air Cylinder SI80BX55 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 SAI80BX55, 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 → SAI80BX55
- 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 SI80BX55
The AirTAC SI80BX55 is a discontinued double-acting ISO 15552 profile cylinder with an 80mm bore and 55mm stroke, delivering 2513N push force at 0.5MPa via a G3/8 port. It is replaced by the direct replacement SAI80BX55.
The SAI80BX55 retains identical dimensions and output but adds an upgraded two Y-shaped piston seal for low start-up pressure. This -B variant uses a SUS304 stainless rod, but lacks a magnet so it cannot take a sensor.
Airtac SI80 Standard Air Cylinder SI80BX55 Technical Specifications
| Model | Airtac SI80 Standard Air Cylinder SI80BX55 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI80BX55 |
| 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 SAI80BX55 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 SAI80BX55 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 SI80BX55
| 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 SI80BX55 Is Used
Stainless Rod Clamping
Uses the SUS304 rod to secure metal parts in humid washdown environments, providing 2268N pull force at 0.5MPa without corrosion.
Heavy Duty Forming
Applies 2513N of push force at 0.5MPa for short-stroke pressing and light forming tasks on automated assembly lines.
Product Diversion
Executes 55mm strokes to divert heavy packages on conveyors, relying on the 36mm adjustable air cushions to decelerate loads smoothly.
Replacing the Airtac SI80 Standard Air Cylinder SI80BX55 with the SAI80BX55
To replace the SI80BX55, order the SAI80BX55. Verify the ISO 15552 mounting interface, 80mm bore, 55mm stroke, G3/8 port, and SUS304 rod. If you need position sensing, this no-magnet SKU cannot accept a switch; you must select an SAI80X55S instead. For sizing, a 63mm bore yields 1559N push at 0.5MPa, while a 100mm bore yields 3927N. Note that a plain cylinder drifts on air loss; for load holding use an external pilot check valve or the SAIL/BSAI lock variant.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI80BX55
- ✓ 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 SI80BX55 FAQ
Yes, the SI80BX55 is discontinued. The direct replacement is the SAI80BX55, which shares the identical ISO 15552 mounting interface, 80mm bore, 55mm stroke, output force, G3/8 port, and SUS304 stainless rod.
The 80mm bore features a G3/8 port and delivers 2513N push / 2268N pull at 0.5MPa, 3518N push at 0.7MPa, 4523N push at 0.9MPa, and a theoretical max of 513kgf at 1.0MPa.
Request a Quote for the SAI80BX55
Send us the quantity and destination. We confirm price, stock and lead time on the SAI80BX55 replacement — usually within 7-8 hours.