This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI80X120STC, 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 SI80X120STC
The AirTAC SI80 Standard Air Cylinder SI80X120STC is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø80mm bore and 120mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI80X120STC, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ80 mm
- Stroke120 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAI80X120STC
- 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 SI80X120STC
The AirTAC SI80X120STC is a discontinued double-acting ISO 15552 profile cylinder with a 120 mm stroke and TC trunnion mount. It delivers a push force of 2513 N at 0.5 MPa through its G3/8 port. AirTAC replaced this legacy unit with the SAI80X120STC, a direct upgrade retaining the exact ISO 15552 mounting interface, bore, stroke, output force, and port size.
The SAI80X120STC features an upgraded piston seal with two Y-shaped one-way elements for low start-up pressure and long life. This -S model includes a piston magnet for CS1-B/DS1-B sensors, while the SAI family also introduces SAIL, SAIF, and BSAI lock variants the original SI lacked.
Airtac SI80 Standard Air Cylinder SI80X120STC Technical Specifications
| Model | Airtac SI80 Standard Air Cylinder SI80X120STC |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI80X120STC |
| Bore size | Ø80 mm |
| Stroke | 120 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 SAI80X120STC 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 SAI80X120STC 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 SI80X120STC
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 80 | Bore size in mm. |
| ×120 | 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 SI80X120STC Is Used
Package Diversion
Drives heavy-duty routing gates on high-speed packaging lines, utilizing the 2513 N push force to reliably pivot fully loaded pallets.
Press Ejection
Ejects formed metal or plastic components from machining centers, using the 120 mm stroke and adjustable end cushions to prevent impact damage.
Pallet Lift Stops
Acts as a robust mechanical stop for inbound pallets on roller conveyors, absorbing kinetic energy via the TC trunnion mount.
Replacing the Airtac SI80 Standard Air Cylinder SI80X120STC with the SAI80X120STC
To replace the SI80X120STC, order the SAI80X120STC. Verify your ISO 15552 TC trunnion mounting interface, 80 mm bore, 120 mm stroke, G3/8 port, and the -S magnet requirement. If you need to size up or down, neighbouring bores are 63 mm and 100 mm. At 0.5 MPa, this 80 mm bore pushes 2513 N and pulls 2268 N. Note that a plain ISO 15552 cylinder does not hold load without live air; the cushion only decelerates. For load holding on air loss, use an external rod lock, pilot check valve, or the SAIL/BSAI lock variant. Rod material options include carbon steel, SUS420J2, and SUS304.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI80X120STC
- ✓ 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 SI80X120STC FAQ
Yes, the SI80X120STC is discontinued. The direct replacement is the SAI80X120STC. It shares the identical ISO 15552 mounting interface, 80 mm bore, 120 mm stroke, output force, and G3/8 port, fitting directly into your existing TC trunnion fixtures.
This double-acting cylinder operates at 30-800 mm/s. The 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 maximum of 513 kgf at 1.0 MPa. It features a 25 mm rod and M20x1.5 thread.
Related AirTAC SAI Cylinders
Request a Quote for the SAI80X120STC
Send us the quantity and destination. We confirm price, stock and lead time on the SAI80X120STC replacement — usually within 7-8 hours.