This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI80BX275, 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 SI80BX275
The AirTAC SI80 Standard Air Cylinder SI80BX275 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø80mm bore and 275mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI80BX275, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ80 mm
- Stroke275 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAI80BX275
- 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 SI80BX275
The AirTAC SI80BX275 is a discontinued double-acting ISO 15552 profile cylinder with a 275 mm stroke. It delivers 2513 N push and 2268 N pull at 0.5 MPa through a G3/8 port. The direct replacement is the SAI80BX275, matching the bore, stroke, force, port and ISO 15552 mounting interface. This SKU features a SUS304 stainless piston rod for corrosion resistance but lacks a magnet, so it cannot accept a sensor.
The SAI upgrade introduces a two Y-shaped one-way piston seal for low start-up pressure and long life. For load holding, note that a plain cylinder drifts without live air; the cushion only decelerates. Use the SAIL or BSAI lock variants if needed.
Airtac SI80 Standard Air Cylinder SI80BX275 Technical Specifications
| Model | Airtac SI80 Standard Air Cylinder SI80BX275 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI80BX275 |
| Bore size | Ø80 mm |
| Stroke | 275 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 SAI80BX275 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 SAI80BX275 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 SI80BX275
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 80 | Bore size in mm. |
| ×275 | 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 SI80BX275 Is Used
Conveyor Diverter
Actuates a diverter gate on a packaging line, utilizing the 2513 N push force to reliably redirect heavy cartons at high cycling speeds.
Pallet Lift Gate
Raises and lowers an ergonomic pallet gate, safely handling the 128 kg vertical load capacity within the 275 mm stroke envelope.
Machine Guard Door
Drives a sliding machine guard door, where the SUS304 stainless rod provides necessary corrosion resistance in washdown machining areas.
Replacing the Airtac SI80 Standard Air Cylinder SI80BX275 with the SAI80BX275
To replace the SI80BX275, order the SAI80BX275. Verify the ISO 15552 mounting interface, the G3/8 port, and the M20x1.5 rod thread. Because this SKU lacks a magnet (-S), it cannot take a CS1-B/DS1-B sensor; order a magnet-equipped version if position detection is needed. The 275 mm stroke is standard, but at this length you should guide the load to prevent rod bending and side-load wear. Sizing both ways: if moving down, a 63 mm bore gives 1559 N push at 0.5 MPa; if moving up, a 100 mm bore gives 3927 N. Remember that a plain cylinder does not hold load on air loss—use an external rod lock or pilot check valve for vertical safety.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI80BX275
- ✓ 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 SI80BX275 FAQ
Yes, the AirTAC SI80BX275 is discontinued. The direct replacement is the SAI80BX275. It is dimensionally interchangeable per ISO 15552, retaining the same 80 mm bore, 275 mm stroke, 513 kgf max force, G3/8 port, and mounting fixtures.
This 80 mm bore cylinder uses a G3/8 air port. The thrust ratings are: 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 SAI80BX275
Send us the quantity and destination. We confirm price, stock and lead time on the SAI80BX275 replacement — usually within 7-8 hours.