This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI80X300STC, 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 SI80X300STC
The AirTAC SI80 Standard Air Cylinder SI80X300STC is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø80mm bore and 300mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI80X300STC, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ80 mm
- Stroke300 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAI80X300STC
- 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 SI80X300STC
The AirTAC SI80X300STC is a discontinued double-acting ISO 15552 profile cylinder with an 80mm bore, 300mm stroke, and a TC trunnion mount. Delivering 2513 N push force at 0.5 MPa, it features a G3/8 port and M20x1.5 rod thread. The direct replacement is the SAI80X300STC, matching the bore, stroke, force, port, and ISO 15552 mounting interface.
The SAI upgrade introduces a two Y-shaped one-way piston seal for low start-up pressure and long life. It also adds SAIL, SAIF, and BSAI lock variants the SI lacked. The -S suffix means it has a piston magnet for CS1-B/DS1-B sensors.
Airtac SI80 Standard Air Cylinder SI80X300STC Technical Specifications
| Model | Airtac SI80 Standard Air Cylinder SI80X300STC |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI80X300STC |
| Bore size | Ø80 mm |
| Stroke | 300 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 SAI80X300STC 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 SAI80X300STC 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 SI80X300STC
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 80 | Bore size in mm. |
| ×300 | 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 SI80X300STC Is Used
Pallet Diversion
Actuates heavy lane diverters on packaging lines, using the 300mm stroke to shift pallets smoothly into sorting channels.
Vertical Lift Gate
Raises and lowers mezzanine safety gates, providing robust vertical lifting power for material handling workflows.
Press Ejection
Ejects formed metal parts from stamping presses, absorbing end-of-stroke impact with adjustable air cushions.
Replacing the Airtac SI80 Standard Air Cylinder SI80X300STC with the SAI80X300STC
To replace the SI80X300STC, order the SAI80X300STC. Verify the ISO 15552 TC trunnion mount, 80mm bore, 300mm stroke, G3/8 port, and the -S magnet for CS1-B/DS1-B switches. If sizing up or down, neighbouring bores change the 0.5 MPa force: a 63mm bore gives 1559 N push, while a 100mm bore gives 3927 N. For this 300mm stroke, use an external guide to prevent rod bending and side-load wear. A plain SAI does not hold load without live air; the cushion only decelerates. For load holding on air loss, use an external rod lock, a pilot check valve, or the SAIL/BSAI lock variant.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI80X300STC
- ✓ 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 SI80X300STC FAQ
Yes, the SI80X300STC is discontinued. The direct replacement is the SAI80X300STC. It shares the same ISO 15552 mounting interface, 80mm bore, 300mm stroke, output force, G3/8 port, and TC trunnion mount, fitting existing fixtures perfectly.
The 80mm bore uses 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. Operating speed is 30-800 mm/s.
Related AirTAC SAI Cylinders
Request a Quote for the SAI80X300STC
Send us the quantity and destination. We confirm price, stock and lead time on the SAI80X300STC replacement — usually within 7-8 hours.