This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI80BX125H, 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 SI80BX125H
The AirTAC SI80 Standard Air Cylinder SI80BX125H 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 SAI80BX125H, 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 → SAI80BX125H
- 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 SI80BX125H
The AirTAC SI80BX125H is a discontinued double-acting ISO 15552 profile cylinder featuring an 80mm bore, 125mm stroke, SUS304 stainless piston rod and a Viton H high-temperature seal (0-150 C). It delivers 2513 N push and 2268 N pull at 0.5 MPa, utilizing a G3/8 air port and M20x1.5 rod thread.
AirTAC replaced this legacy unit with the SAI80BX125H, a direct sharing the exact ISO 15552 mounting interface, force, port and stroke. The SAI upgrades the piston seal to two Y-shaped one-way elements for lower start-up pressure. As this SKU lacks a magnet (-S), it cannot accept a CS1-B/DS1-B sensor.
Airtac SI80 Standard Air Cylinder SI80BX125H Technical Specifications
| Model | Airtac SI80 Standard Air Cylinder SI80BX125H |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI80BX125H |
| 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 SAI80BX125H 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 SAI80BX125H 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 SI80BX125H
| 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 SI80BX125H Is Used
High-Temp Forming Press
Uses the Viton H seal and SUS304 rod to withstand 150 C ambient heat while delivering 2513 N of push force at 0.5 MPa for stamping light metal components.
Corrosive Fluid Diversion
The SUS304 stainless piston rod resists moisture and chemical washdowns in food or pharmaceutical lines while actuating 125mm diverter gates.
Replacing the Airtac SI80 Standard Air Cylinder SI80BX125H with the SAI80BX125H
To replace the SI80BX125H, order the SAI80BX125H and verify the ISO 15552 mounting fixture, G3/8 port, M20x1.5 thread, and 125mm stroke. Because this SKU has no -S magnet, it cannot support position sensing; if switches are needed, select a magnet-equipped SAI. The SUS304 (-B) rod and Viton H (-H) seal must be specified for corrosive or high-heat (0-150 C) environments. If downsizing, a 63mm bore yields 1559 N push at 0.5 MPa; if upsizing, a 100mm bore provides 3927 N. Remember that a standard cylinder drifts on air loss—the cushion only decelerates near stroke end. For secure load holding, use an external pilot check valve, rod lock, or the SAIL/BSAI lock variants.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI80BX125H
- ✓ 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 SI80BX125H FAQ
Yes, the SI80BX125H is discontinued. The direct replacement is the SAI80BX125H. It shares the same ISO 15552 mounting interface, 80mm bore, 125mm stroke, G3/8 port, and output force, fitting existing fixtures perfectly while upgrading the piston seal.
This double-acting cylinder uses a G3/8 air port. At 0.5 MPa it provides 2513 N push and 2268 N pull force. At 0.7 MPa push is 3518 N, and at 0.9 MPa it is 4523 N. The theoretical maximum force is 513 kgf at 1.0 MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI80BX125H
Send us the quantity and destination. We confirm price, stock and lead time on the SAI80BX125H replacement — usually within 7-8 hours.