This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI80BX125, 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 SI80BX125
The AirTAC SI80 Standard Air Cylinder SI80BX125 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø80mm bore and 125mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI80BX125, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ80 mm
- Stroke125 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAI80BX125
- 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 SI80BX125
The AirTAC SI80BX125 is a discontinued double-acting ISO 15552 profile cylinder with an 80mm bore and 125mm stroke. It delivers 2513N push and 2268N pull at 0.5MPa, features a SUS304 stainless steel rod, and uses a G3/8 port. AirTAC replaced this legacy unit with the SAI80BX125, a direct replacement sharing the exact ISO 15552 mounting interface, force, and dimensions.
The SAI upgrade introduces a two Y-shaped one-way piston seal for low start-up pressure and longevity. Without a magnet (-S), this specific SKU cannot accept a sensor. Note the air cushion only decelerates; use a pilot check valve or SAIL lock variant to hold loads.
Airtac SI80 Standard Air Cylinder SI80BX125 Technical Specifications
| Model | Airtac SI80 Standard Air Cylinder SI80BX125 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI80BX125 |
| Bore size | Ø80 mm |
| Stroke | 125 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 SAI80BX125 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 SAI80BX125 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 SI80BX125
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 80 | Bore size in mm. |
| ×125 | 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 SI80BX125 Is Used
Stainless Rod Actuation
Ideal for washdown or corrosive manufacturing lines requiring the SUS304 rod option to resist degradation while delivering 2513N push force.
Heavy Transfer Diverters
Provides robust 125mm stroke diversion for heavy product flows, utilizing the ISO 15552 mounting interface for rigid fixture integration.
Pallet Stop Gates
Functions as a heavy-duty stopping gate in logistics hubs, safely arresting pallets using the 2268N pull force at 0.5MPa.
Replacing the Airtac SI80 Standard Air Cylinder SI80BX125 with the SAI80BX125
To replace the discontinued SI80BX125, order the SAI80BX125. Confirm the ISO 15552 mounting accessory (LB, FA, TC, etc.), the G3/8 port, and the SUS304 rod. This SKU lacks a magnet, so it cannot take CS1-B/DS1-B sensors; order an -S variant if sensing is needed. Sizing both ways: the 80mm bore yields 2513N push at 0.5MPa, sitting between the 63mm (1559N) and 100mm (3927N) bores. The 125mm stroke is under the 300mm side-load risk threshold, but always guide the load to prevent rod bending. For load holding on air loss, the cushion will not lock the piston; select the SAIL or BSAI lock variant, or an external pilot check valve.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI80BX125
- ✓ 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 SI80BX125 FAQ
Yes, the SI80BX125 is discontinued. The direct replacement is the SAI80BX125. It shares the identical ISO 15552 mounting interface, 80mm bore, 125mm stroke, G3/8 port, and SUS304 rod, fitting existing fixtures perfectly while upgrading the piston seal.
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. The adjustable air cushion is 36mm at each end.
Related AirTAC SAI Cylinders
Request a Quote for the SAI80BX125
Send us the quantity and destination. We confirm price, stock and lead time on the SAI80BX125 replacement — usually within 7-8 hours.