This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI80BX50H, 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 SI80BX50H
The AirTAC SI80 Standard Air Cylinder SI80BX50H is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø80mm bore and 50mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI80BX50H, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ80 mm
- Stroke50 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAI80BX50H
- 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 SI80BX50H
The AirTAC SI80BX50H is a discontinued double-acting ISO 15552 profile cylinder with an 80mm bore and 50mm stroke. Built for high-temperature environments, it features a Viton H seal (0 to 150 C) and a SUS304 stainless piston rod. Delivering 2513 N push force at 0.5 MPa via a G3/8 port, its direct replacement is the SAI80BX50H. This current-production SAI model matches the exact ISO 15552 mounting interface, bore, stroke, force, and port.
The SAI upgrade introduces an advanced piston seal with two Y-shaped one-way elements, ensuring low start-up pressure and extended life. Note that this specific SKU lacks a magnet (-S), so it cannot accept CS1-B or DS1-B sensors.
Airtac SI80 Standard Air Cylinder SI80BX50H Technical Specifications
| Model | Airtac SI80 Standard Air Cylinder SI80BX50H |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI80BX50H |
| Bore size | Ø80 mm |
| Stroke | 50 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 SAI80BX50H 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 SAI80BX50H 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 SI80BX50H
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 80 | Bore size in mm. |
| ×50 | 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 SI80BX50H Is Used
High-Temperature Ejection
Uses the Viton H seal and SUS304 rod to reliably push parts out of hot molding zones up to 150 C without seal degradation.
Corrosive Environment Clamping
Applies 2513 N of clamping force on machined components in wash-down or chemical areas using the stainless rod option.
Short-Stroke Diverting
Executes 50mm diverting strokes on heavy packaging lines, safely handling a 1508 N working load at 0.5 MPa.
Replacing the Airtac SI80 Standard Air Cylinder SI80BX50H with the SAI80BX50H
To replace the discontinued SI80BX50H, order the SAI80BX50H, confirming the ISO 15552 interface, 80mm bore, 50mm stroke, G3/8 port, and mounting accessory. This high-temp Viton H variant with a SUS304 rod scales both ways: a 63mm bore yields 1559 N push at 0.5 MPa, while a 100mm bore provides 3927 N. A plain cylinder drifts on air loss—the cushion only decelerates—so for load holding, specify an external pilot check valve, rod lock, or the SAIL/BSAI lock variants. Because this SKU lacks a magnet, it cannot support position sensing.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI80BX50H
- ✓ 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 SI80BX50H FAQ
Yes, the SI80BX50H is discontinued. The direct replacement is the SAI80BX50H. It is dimensionally interchangeable per ISO 15552, retaining the same 80mm bore, 50mm stroke, G3/8 port, and mounting interface.
The G3/8 port feeds a 25mm rod delivering 2513 N push and 2268 N pull at 0.5 MPa. At 0.7 MPa push is 3518 N, and 4523 N at 0.9 MPa. The theoretical maximum force is 513 kgf at 1.0 MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI80BX50H
Send us the quantity and destination. We confirm price, stock and lead time on the SAI80BX50H replacement — usually within 7-8 hours.