This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI80X670S, 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 SI80X670S
The AirTAC SI80 Standard Air Cylinder SI80X670S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø80mm bore and 670mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI80X670S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ80 mm
- Stroke670 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAI80X670S
- 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 SI80X670S
The AirTAC SI80X670S is a discontinued double-acting ISO 15552 profile cylinder featuring an extruded aluminum barrel and a built-in magnet. In this 80 mm bore class it delivers 2513 N push and 2268 N pull at 0.5 MPa, operating through a G3/8 port. Because the SI line is end-of-life, you should order the direct replacement: the SAI80X670S. It maintains the same interface, stroke and force.
The SAI upgrade introduces a refined piston seal utilizing two Y-shaped one-way elements for low start-up pressure and extended life. The original SI-SKU used CS1-B/DS1-B sensors, while the SAI family accepts current AirTAC switches.
Airtac SI80 Standard Air Cylinder SI80X670S Technical Specifications
| Model | Airtac SI80 Standard Air Cylinder SI80X670S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI80X670S |
| Bore size | Ø80 mm |
| Stroke | 670 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 SAI80X670S 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 SAI80X670S 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 SI80X670S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 80 | Bore size in mm. |
| ×670 | 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 SI80X670S Is Used
Long-Stroke Diversion
Pushes heavy pallets across transfer lines using the 670 mm reach and 2513 N force, requiring external guides to prevent rod bending.
Large Press Ejection
Ejects molded parts from machinery, utilizing the 36 mm adjustable air cushions to decelerate the 80 mm bore at stroke end.
Replacing the Airtac SI80 Standard Air Cylinder SI80X670S with the SAI80X670S
To replace the discontinued SI80X670S, specify the SAI80X670S. Verify the ISO 15552 mounting interface, the 670 mm stroke, the G3/8 port, and your mounting accessory (such as LB foot or TC trunnion). Because the -S magnet is present, confirm your switch compatibility. Sizing both ways: a neighboring 63 mm bore provides 1559 N push at 0.5 MPa, while a 100 mm bore offers 3927 N. Note that a plain cylinder does not hold load on air loss; the cushion only decelerates. For load holding, use an external rod lock or the SAIL/BSAI lock variant. Finally, at 670 mm stroke, prevent rod bending by using an external guide to manage side loads.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI80X670S
- ✓ 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 SI80X670S FAQ
Yes, the SI80X670S is discontinued. The direct replacement is the SAI80X670S. It is dimensionally interchangeable per ISO 15552, maintaining the same 80 mm bore, 670 mm stroke, force, G3/8 port and mounting interface.
The G3/8 port feeds a 25 mm rod. Force output is 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. Speed is 30-800 mm/s.
Related AirTAC SAI Cylinders
Request a Quote for the SAI80X670S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI80X670S replacement — usually within 7-8 hours.