This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI80X320STC, 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 SI80X320STC
The AirTAC SI80 Standard Air Cylinder SI80X320STC is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø80mm bore and 320mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI80X320STC, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ80 mm
- Stroke320 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAI80X320STC
- 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 SI80X320STC
The AirTAC SI80X320STC is a discontinued double-acting ISO 15552 profile cylinder with a 320 mm stroke, delivering 2513 N push force at 0.5 MPa through its G3/8 port. The direct replacement is the SAI80X320STC, which matches the original bore, stroke, output force, and TC trunnion mounting interface exactly.
The SAI upgrade features a revised piston seal using two Y-shaped one-way elements for lower start-up pressure and longer life. The original -S magnet supports CS1-B/DS1-B sensors, while the SAI family also introduces BSAI clamp-lock and SAIL air-released lock variants absent in the legacy line.
Airtac SI80 Standard Air Cylinder SI80X320STC Technical Specifications
| Model | Airtac SI80 Standard Air Cylinder SI80X320STC |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI80X320STC |
| Bore size | Ø80 mm |
| Stroke | 320 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 SAI80X320STC 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 SAI80X320STC 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 SI80X320STC
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 80 | Bore size in mm. |
| ×320 | 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 SI80X320STC Is Used
Pallet Diversion
Routes heavy pallets on a packaging line using the 2513 N push force and 320 mm travel to actuate a diverter arm.
Press Ejection
Ejects formed metal components from a press bed, relying on the 36 mm adjustable air cushions to decelerate the rod smoothly.
Replacing the Airtac SI80 Standard Air Cylinder SI80X320STC with the SAI80X320STC
To replace the SI80X320STC, order the SAI80X320STC. Confirm the ISO 15552 TC trunnion mounting, 80 mm bore, 320 mm stroke, G3/8 port, and the -S magnet for current AirTAC switches. If you need more force, the neighboring 100 mm bore yields 3927 N push at 0.5 MPa; if less force is acceptable, the 63 mm bore provides 1559 N. Note that a plain cylinder drifts on air loss—the cushion only decelerates—so use a SAIL or BSAI lock variant, or an external pilot check valve, to hold a load. Finally, at 320 mm, this long stroke demands external guides to prevent rod bending and excessive side loading.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI80X320STC
- ✓ 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 SI80X320STC FAQ
Yes, the AirTAC SI80X320STC is discontinued. The direct replacement is the SAI80X320STC. It is dimensionally interchangeable per ISO 15552, matching the 80 mm bore, 320 mm stroke, G3/8 port, and TC mounting interface exactly.
The G3/8 port bore delivers a push force of 2513 N and a pull force of 2268 N at 0.5 MPa. At 0.7 MPa it pushes 3518 N, and at 0.9 MPa it pushes 4523 N. The theoretical maximum force is 513 kgf at 1.0 MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI80X320STC
Send us the quantity and destination. We confirm price, stock and lead time on the SAI80X320STC replacement — usually within 7-8 hours.