This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI80X300N, 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 SI80X300N
The AirTAC SI80 Standard Air Cylinder SI80X300N 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 SAI80X300N, 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 → SAI80X300N
- 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 SI80X300N
The AirTAC SI80X300N is a discontinued double-acting ISO 15552 profile cylinder with an 80 mm bore and 300 mm stroke. It delivers 2513 N push and 2268 N pull at 0.5 MPa through a G3/8 port. AirTAC replaced this legacy unit with the SAI80X300N, a direct replacement sharing the exact ISO 15552 mounting interface, M20x1.5 rod thread, and 36 mm cushions.
The SAI upgrade features a two Y-shaped one-way piston seal for low start-up pressure and long life. Note this non-magnet version cannot take a sensor, and its NBR seals handle -20 to +70 C (Viton H extends this to 150 C).
Airtac SI80 Standard Air Cylinder SI80X300N Technical Specifications
| Model | Airtac SI80 Standard Air Cylinder SI80X300N |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI80X300N |
| 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 SAI80X300N 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 SAI80X300N 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 SI80X300N
| 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 SI80X300N Is Used
Pallet Diversion
Actuates heavy lane diverters on packaging lines, using the 2513 N push force at 0.5 MPa to shift loaded pallets smoothly.
Vertical Lift Gate
Raises and lowers 100 kg access gates; the 300 mm stroke provides ample travel while the 128 kg vertical lift margin ensures safety.
Press Ejection
Ejects formed metal parts from hydraulic presses, relying on adjustable 36 mm air cushions to decelerate the rod at stroke end.
Replacing the Airtac SI80 Standard Air Cylinder SI80X300N with the SAI80X300N
To replace the SI80X300N, order the SAI80X300N and confirm the ISO 15552 interface, 80 mm bore, 300 mm stroke, G3/8 port (PT/G/NPT), and mounting accessory. This non-magnet SKU cannot accept a CS1-B/DS1-B sensor; order an -S SAI if position detection is needed. If sizing up, the 100 mm bore offers 3927 N push at 0.5 MPa; sizing down, the 63 mm bore provides 1559 N. Because stroke is 300 mm, use an external guide to prevent rod bending under side loads. A plain cylinder drifts on air loss; for load holding, use an external rod lock, pilot check valve, or the SAIL/BSAI lock variant.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI80X300N
- ✓ 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 SI80X300N FAQ
Yes, the SI80X300N is discontinued. The direct replacement is the SAI80X300N. It is dimensionally interchangeable per ISO 15552, retaining the same 80 mm bore, 300 mm stroke, output force, G3/8 port, and mounting interface. The SAI simply upgrades the piston seal to two Y-shaped one-way elements for lower start-up pressure and longer life.
The 80 mm 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 maximum of 513 kgf at 1.0 MPa. Operating speed is 30-800 mm/s.
Related AirTAC SAI Cylinders
Request a Quote for the SAI80X300N
Send us the quantity and destination. We confirm price, stock and lead time on the SAI80X300N replacement — usually within 7-8 hours.