This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI80BX270, 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 SI80BX270
The AirTAC SI80 Standard Air Cylinder SI80BX270 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø80mm bore and 270mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI80BX270, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ80 mm
- Stroke270 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAI80BX270
- 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 SI80BX270
The AirTAC SI80BX270 is a discontinued double-acting ISO 15552 profile cylinder with an 80mm bore and 270mm stroke. Featuring a SUS304 stainless piston rod (-B) and delivering 2513N push at 0.5MPa, it is replaced by the SAI80BX270 direct. The SAI matches the G3/8 port, M20x1.5 thread and ISO 15552 mounting exactly.
The SAI upgrade utilizes two Y-shaped one-way piston seals for low start-up pressure and long life. Note this non-magnet SKU cannot take sensors. For load holding, the SAIL lock or BSAI clamp-lock variants are required.
Airtac SI80 Standard Air Cylinder SI80BX270 Technical Specifications
| Model | Airtac SI80 Standard Air Cylinder SI80BX270 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI80BX270 |
| Bore size | Ø80 mm |
| Stroke | 270 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 SAI80BX270 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 SAI80BX270 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 SI80BX270
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 80 | Bore size in mm. |
| ×270 | 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 SI80BX270 Is Used
Stainless Rod Diverter
Ideal for diverting heavy items on a washdown conveyor line, utilizing the 80mm bore's 2513N push force and SUS304 rod for corrosion resistance.
Mid-Stroke Pressing
Provides consistent 270mm travel for pressing sub-assemblies, safely operating at a 1508N working load while benefiting from adjustable end cushions.
Replacing the Airtac SI80 Standard Air Cylinder SI80BX270 with the SAI80BX270
To replace the SI80BX270, order the SAI80BX270. Verify the ISO 15552 interface, 80mm bore, 270mm stroke, G3/8 port and SUS304 rod (-B). This non-magnet SKU cannot accept CS1-B/DS1-B switches. Sizing both ways: 63mm yields 1559N [email protected]; 100mm yields 3927N. Since stroke is 270mm (>=300mm threshold approaches), ensure guide alignment to prevent rod bending. Air cushions only decelerate; use SAIL/BSAI or a pilot check valve for load holding.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI80BX270
- ✓ 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 SI80BX270 FAQ
Yes, the SI80BX270 is discontinued. The direct replacement is the SAI80BX270. It shares the identical ISO 15552 mounting interface, 80mm bore, 270mm stroke, 2513N force, G3/8 port and SUS304 rod, fitting existing fixtures perfectly.
This double-acting cylinder features a G3/8 air port and M20x1.5 rod thread. Force ratings are: 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.
Related AirTAC SAI Cylinders
Request a Quote for the SAI80BX270
Send us the quantity and destination. We confirm price, stock and lead time on the SAI80BX270 replacement — usually within 7-8 hours.