This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI80X725, 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 SI80X725
The AirTAC SI80 Standard Air Cylinder SI80X725 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø80mm bore and 725mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI80X725, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ80 mm
- Stroke725 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAI80X725
- 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 SI80X725
The AirTAC SI80X725 is a discontinued double-acting ISO 15552 profile cylinder delivering 2513 N push force at 0.5 MPa through an 80 mm bore and 725 mm stroke. It features a Ø25 mm carbon steel rod, M20x1.5 thread, and a G3/8 air port. Because this legacy unit is end-of-life, order the SAI80X725 direct replacement, which matches the exact ISO 15552 mounting interface, stroke, and output force.
The SAI upgrade introduces a two Y-shaped one-way piston seal for low start-up pressure and long life. Note this non-magnet SKU cannot take a sensor, and plain cylinders drift without air; use the SAIL or BSAI lock variants for holding.
Airtac SI80 Standard Air Cylinder SI80X725 Technical Specifications
| Model | Airtac SI80 Standard Air Cylinder SI80X725 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI80X725 |
| Bore size | Ø80 mm |
| Stroke | 725 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 SAI80X725 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 SAI80X725 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 SI80X725
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 80 | Bore size in mm. |
| ×725 | 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 SI80X725 Is Used
Long-Stroke Diversion
Drives large package diverters or sorting gates across wide conveyor belts, utilizing the 725 mm stroke to clear wide product lanes.
Elevator Lowering
Lowers heavy pallets or fixtures in vertical material handling tasks, providing 2513 N push force at 0.5 MPa for reliable descent.
Press Ejection
Actuates long-travel ejection arms on stamping presses to clear bulky formed parts from the die area safely.
Replacing the Airtac SI80 Standard Air Cylinder SI80X725 with the SAI80X725
To replace the SI80X725, order the SAI80X725. Verify your ISO 15552 mounting fixtures (LB, FA, TC, etc.), the 725 mm stroke, and the G3/8 port. Because this 725 mm stroke exceeds 300 mm, prevent rod bending by using an external guide to absorb side loads. If you need to step up force, the 100 mm bore offers 3927 N at 0.5 MPa; stepping down to 63 mm yields 1559 N. The air cushion only decelerates the piston at stroke ends—it will not hold a load. For dead-load holding on air loss, specify the SAIL or BSAI lock variant, or add an external pilot check valve. This specific SKU lacks the -S magnet, so it cannot accept CS1-B/DS1-B sensors.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI80X725
- ✓ 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 SI80X725 FAQ
Yes, the SI80X725 is discontinued. The direct replacement is the SAI80X725. It shares the identical ISO 15552 mounting interface, 80 mm bore, 725 mm stroke, output force, and G3/8 port, fitting directly into your existing fixtures.
The bore is 80 mm with 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.
Request a Quote for the SAI80X725
Send us the quantity and destination. We confirm price, stock and lead time on the SAI80X725 replacement — usually within 7-8 hours.