This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI80BX45S, 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 SI80BX45S
The AirTAC SI80 Standard Air Cylinder SI80BX45S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø80mm bore and 45mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI80BX45S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ80 mm
- Stroke45 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAI80BX45S
- 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 SI80BX45S
The AirTAC SI80BX45S is a discontinued double-acting ISO 15552 profile cylinder featuring a SUS304 stainless piston rod, a 45 mm stroke, and a G3/8 port. It delivers 2513 N push and 2268 N pull at 0.5 MPa, making it a robust choice for medium-force tasks. AirTAC replaced this legacy unit with the SAI80BX45S, a direct sharing the exact ISO 15552 mounting interface, bore, and force ratings.
The SAI upgrade introduces a two Y-shaped one-way piston seal for low start-up pressure and long life. The original -S magnet supports legacy CS1-B/DS1-B sensors, while the SAI family adds SAIL lock, SAIF valve, and BSAI clamp-lock variants the SI lacked.
Airtac SI80 Standard Air Cylinder SI80BX45S Technical Specifications
| Model | Airtac SI80 Standard Air Cylinder SI80BX45S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI80BX45S |
| Bore size | Ø80 mm |
| Stroke | 45 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 SAI80BX45S 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 SAI80BX45S 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 SI80BX45S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 80 | Bore size in mm. |
| ×45 | 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 SI80BX45S Is Used
Stainless Actuation
Leverages the SUS304 rod for clamping and pressing in washdown or mildly corrosive manufacturing environments.
Short-Stroke Pressing
Uses the 45 mm stroke to apply 2513 N of push force at 0.5 MPa for compact insertion and spot-joining tasks.
Diversion Gates
Drives heavy package routing gates where the 80 mm bore provides enough thrust to overcome side friction.
Replacing the Airtac SI80 Standard Air Cylinder SI80BX45S with the SAI80BX45S
To replace the SI80BX45S, order the SAI80BX45S. Verify your ISO 15552 mounting accessory (LB, FA, TC, etc.), the G3/8 port, and the -S magnet for current AirTAC switches. The SUS304 rod (-B) is essential for wet or corrosive settings. If you need more force, the 100 mm bore yields 3927 N push at 0.5 MPa; if less is required, the 63 mm bore gives 1559 N. Note that a plain cylinder drifts on air loss—the cushion only decelerates. For load holding, specify the SAIL or BSAI lock variant, or use an external pilot check valve.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI80BX45S
- ✓ 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 SI80BX45S FAQ
Yes, the SI80BX45S is discontinued. The direct replacement is the SAI80BX45S. It shares the same ISO 15552 mounting interface, 80 mm bore, 45 mm stroke, G3/8 port, and output force, fitting existing fixtures perfectly.
It features a G3/8 air port and provides 2513 N push / 2268 N pull at 0.5 MPa, 3518 N push at 0.7 MPa, 4523 N push at 0.9 MPa, and a theoretical max of 513 kgf at 1.0 MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI80BX45S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI80BX45S replacement — usually within 7-8 hours.