This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI80BX450SH, 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 SI80BX450SH
The AirTAC SI80 Standard Air Cylinder SI80BX450SH is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø80mm bore and 450mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI80BX450SH, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ80 mm
- Stroke450 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAI80BX450SH
- 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 SI80BX450SH
The AirTAC SI80BX450SH is a discontinued double-acting ISO 15552 profile cylinder with an 80mm bore and 450mm stroke. It delivers 2513 N push and 2268 N pull at 0.5 MPa. The direct replacement is the SAI80BX450SH, matching the ISO 15552 mounting interface, bore, stroke, force and G3/8 port. This specific unit features a SUS304 stainless rod and a Viton H high-temperature seal (0 to 150 C).
The SAI upgrade introduces a two Y-shaped one-way piston seal for low start-up pressure and long life. The built-in magnet works with legacy CS1-B/DS1-B sensors, while the SAI family also adds SAIL, SAIF and BSAI variants the SI lacked.
Airtac SI80 Standard Air Cylinder SI80BX450SH Technical Specifications
| Model | Airtac SI80 Standard Air Cylinder SI80BX450SH |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI80BX450SH |
| Bore size | Ø80 mm |
| Stroke | 450 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 SAI80BX450SH 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 SAI80BX450SH 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 SI80BX450SH
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 80 | Bore size in mm. |
| ×450 | 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 SI80BX450SH Is Used
High-Temp Forming Press
Ideal for actuating small presses or forming dies in heated zones up to 150 C, leveraging the Viton H seal and SUS304 rod for corrosion resistance.
Long-Stroke Divertor
The 450mm stroke and 2513 N push force at 0.5 MPa provide ample reach and power to redirect heavy packages on a manufacturing line.
Replacing the Airtac SI80 Standard Air Cylinder SI80BX450SH with the SAI80BX450SH
To replace this SI80BX450SH, order the SAI80BX450SH direct: it preserves the ISO 15552 mounting interface, 450mm stroke, G3/8 port, and mounting accessories. Retain the -B (SUS304 rod), -S (magnet) and -H (Viton H seal) attributes. When sizing, neighbouring bores offer different force classes: a 63mm bore yields 1559 N push at 0.5 MPa, while a 100mm bore yields 3927 N. Because this is a 450mm stroke, prevent rod bending by using an external guide to manage side loads. A plain cylinder drifts on air loss—the cushion only decelerates—so for load holding use an external rod lock, pilot check valve, or the SAIL/BSAI lock variant.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI80BX450SH
- ✓ 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 SI80BX450SH FAQ
Yes, the SI80BX450SH is discontinued. The direct replacement is the SAI80BX450SH. It is dimensionally interchangeable per the ISO 15552 mounting interface, keeping the same 80mm bore, 450mm stroke, output force, G3/8 port and mounting fixtures.
It features a G3/8 air port. The force 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 max of 513 kgf at 1.0 MPa. It operates at 30-800 mm/s.
Related AirTAC SAI Cylinders
Request a Quote for the SAI80BX450SH
Send us the quantity and destination. We confirm price, stock and lead time on the SAI80BX450SH replacement — usually within 7-8 hours.