This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI80X180STC, 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 SI80X180STC
The AirTAC SI80 Standard Air Cylinder SI80X180STC is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø80mm bore and 180mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI80X180STC, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ80 mm
- Stroke180 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAI80X180STC
- 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 SI80X180STC
The AirTAC SI80X180STC is a discontinued double-acting ISO 15552 profile cylinder with an 80mm bore and 180mm stroke. It delivers 2513N push force at 0.5MPa via a G3/8 port. AirTAC replaced this unit with the SAI80X180STC, a direct upgrade retaining the exact TC trunnion mounting, M20x1.5 rod thread, and 36mm cushions.
The SAI upgrade features a modernized piston seal with two Y-shaped one-way elements for low start-up pressure and extended life. This -S model includes a piston magnet for legacy CS1-B/DS1-B sensors, while the SAI family also introduces SAIL and BSAI lock variants absent in the original SI line.
Airtac SI80 Standard Air Cylinder SI80X180STC Technical Specifications
| Model | Airtac SI80 Standard Air Cylinder SI80X180STC |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI80X180STC |
| Bore size | Ø80 mm |
| Stroke | 180 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 SAI80X180STC 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 SAI80X180STC 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 SI80X180STC
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 80 | Bore size in mm. |
| ×180 | 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 SI80X180STC Is Used
Pallet Diverting
Uses the TC trunnion mount to pivot and redirect heavy product pallets along processing lines.
Material Lift Gate
Actuates 1508N safety gates and heavy access doors with reliable double-acting power.
Replacing the Airtac SI80 Standard Air Cylinder SI80X180STC with the SAI80X180STC
To replace the SI80X180STC, order the SAI80X180STC. Verify the ISO 15552 TC trunnion mounting interface, 80mm bore, 180mm stroke, G3/8 port, and the -S magnet requirement. If you need more force, the neighboring 100mm bore yields 3927N push at 0.5MPa; if less is acceptable, the 63mm bore provides 1559N. A plain cylinder drifts on air loss—the cushion only decelerates—so for load holding use an external pilot check valve or the SAIL/BSAI lock variants. The 180mm stroke is short enough to avoid significant rod bending, but always guide the load to prevent side-load wear.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI80X180STC
- ✓ 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 SI80X180STC FAQ
Yes, the SI80X180STC is discontinued. The direct replacement is the SAI80X180STC. It is dimensionally interchangeable per ISO 15552, matching the 80mm bore, 180mm stroke, G3/8 port, force, and TC mounting interface.
This 80mm bore cylinder uses a G3/8 port. It generates 2513N push and 2268N pull at 0.5MPa, 3518N push at 0.7MPa, 4523N push at 0.9MPa, and a maximum theoretical force of 513 kgf at 1.0 MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI80X180STC
Send us the quantity and destination. We confirm price, stock and lead time on the SAI80X180STC replacement — usually within 7-8 hours.