This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI80X300H, 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 SI80X300H
The AirTAC SI80 Standard Air Cylinder SI80X300H 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 SAI80X300H, 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 → SAI80X300H
- 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 SI80X300H
The AirTAC SI80X300H is a discontinued double-acting ISO 15552 profile cylinder with a Viton H high-temperature seal (0 to 150 C). Generating 2513 N push force at 0.5 MPa through its G3/8 port, it is replaced by the SAI80X300H. This direct successor matches the 80 mm bore, 300 mm stroke, and ISO 15552 mounting interface exactly.
The SAI upgrade features a two Y-shaped one-way piston seal for low start-up pressure and long life. Because this specific SKU lacks a magnet (-S), it cannot accept position sensors.
Airtac SI80 Standard Air Cylinder SI80X300H Technical Specifications
| Model | Airtac SI80 Standard Air Cylinder SI80X300H |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI80X300H |
| 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 SAI80X300H 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 SAI80X300H 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 SI80X300H
| 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 SI80X300H Is Used
Hot Stamp Press Ejection
Handles part ejection in hot stamping presses where the Viton H seal survives ambient heat up to 150 C while providing 2513 N of push force.
High-Temp Diverting Arm
Actuates a heavy diverting arm on heat-treat conveyor lines, utilizing the 300 mm stroke to push parts cleanly into cooling bins.
Oven Door Automation
Opens and closes large industrial oven doors, where the high-temperature FKM seals prevent degradation and the ISO 15552 mount handles the mass.
Replacing the Airtac SI80 Standard Air Cylinder SI80X300H with the SAI80X300H
To replace the SI80X300H, order the SAI80X300H to retain the identical ISO 15552 interface, 80 mm bore, 300 mm stroke, G3/8 port, and M20x1.5 rod thread. If you need load holding on air loss, note that a plain cylinder drifts when valve-centered since cushions only decelerate; use an external rod lock, pilot check valve, or the SAIL/BSAI lock variants. For the 300 mm stroke, use an external guide to prevent rod bending from side loads. If sizing down, a 63 mm bore yields 1559 N push at 0.5 MPa; sizing up to 100 mm provides 3927 N. The SAIF variant integrates a 4M valve if needed.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI80X300H
- ✓ 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 SI80X300H FAQ
Yes, the SI80X300H is discontinued. The direct replacement is the SAI80X300H, which shares the same ISO 15552 mounting interface, 80 mm bore, 300 mm stroke, port size, and output force.
The G3/8 port feeds a 25 mm rod. Forces are 2513 N push and 2268 N pull at 0.5 MPa, 3518 N push at 0.7 MPa, and a theoretical max of 513 kgf at 1.0 MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI80X300H
Send us the quantity and destination. We confirm price, stock and lead time on the SAI80X300H replacement — usually within 7-8 hours.