This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI80X370STC, 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 SI80X370STC
The AirTAC SI80 Standard Air Cylinder SI80X370STC is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø80mm bore and 370mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI80X370STC, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ80 mm
- Stroke370 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAI80X370STC
- 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 SI80X370STC
The AirTAC SI80X370STC is a discontinued double-acting ISO 15552 profile cylinder with a 370 mm stroke and TC trunnion mount. Delivering 2513 N push at 0.5 MPa through a G3/8 port, it is replaced by the SAI80X370STC. This direct upgrade matches the exact bore, stroke, force, port and ISO 15552 mounting interface. The SAI features an upgraded piston seal with two Y-shaped one-way elements for low start-up pressure and long life.
The original SI80X370STC includes a piston magnet for legacy CS1-B/DS1-B sensors, while the SAI replacement uses current AirTAC switches. The SAI family also introduces lock and valve variants the SI lacked, such as SAIL, SAIF and BSAI. Note that a standard cylinder drifts without live air; the cushion only decelerates. For load holding, use an external rod lock or pilot check valve. Rod material options include carbon steel, SUS420J2 (A) or SUS304 (B), and Viton H seals raise the temperature range to 150 C.
Airtac SI80 Standard Air Cylinder SI80X370STC Technical Specifications
| Model | Airtac SI80 Standard Air Cylinder SI80X370STC |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI80X370STC |
| Bore size | Ø80 mm |
| Stroke | 370 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 SAI80X370STC 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 SAI80X370STC 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 SI80X370STC
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 80 | Bore size in mm. |
| ×370 | 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 SI80X370STC Is Used
Pallet Diversion
Pushes heavy pallets sideways onto parallel conveyor lines using the 2513 N thrust and TC trunnion mount to handle the 370 mm reach.
Vertical Lift Gate
Raises and lowers loading dock gates, where the 128 kg vertical lift capacity and adjustable cushions safely manage the long travel.
Press Ejection
Ejects formed metal parts from a press bed, using the 370 mm stroke to clear the tooling area before the next cycle.
Replacing the Airtac SI80 Standard Air Cylinder SI80X370STC with the SAI80X370STC
To replace the SI80X370STC, order the SAI80X370STC. Confirm the ISO 15552 TC trunnion interface, 80 mm bore, 370 mm stroke, G3/8 port (PT/G/NPT thread) and the -S magnet. If you need more force, the 100 mm bore yields 3927 N push at 0.5 MPa; if less is required, the 63 mm bore gives 1559 N. Because the 370 mm stroke is long, use an external guide to prevent rod bending and side-load damage. A plain cylinder does not hold load on air loss; the cushion only decelerates. For secure holding, specify the SAIL or BSAI lock variant, or an external pilot check valve.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI80X370STC
- ✓ 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 SI80X370STC FAQ
Yes, the SI80X370STC is discontinued. The direct replacement is the SAI80X370STC. It shares the same ISO 15552 mounting interface, 80 mm bore, 370 mm stroke, output force and G3/8 port, fitting existing fixtures perfectly.
The bore is 80 mm with a G3/8 port. 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 SAI80X370STC
Send us the quantity and destination. We confirm price, stock and lead time on the SAI80X370STC replacement — usually within 7-8 hours.