Bambu H2D High Flow Nozzle | Phaetus Replaceable Hotend Upgrade

But if the goal is to prevent nozzle sticking, I feel that coated hardened steel might offer better cost-effectiveness compared to silicon carbide. After all, once the coating wears out, the sticking issue will likely come back. While silicon carbide has a longer lifespan, its long-term performance might not be as good. It would be great if the price of diamond nozzles could come down—then both performance and longevity would be excellent.

After changing the nozzle, you can start printing directly—how many steps does that save? How to use the full-spool high-model A1? Also, Bambu Lab's original hardened steel nozzle is really bad; it can't even handle a few spools of fiber materials. After 4 or 5 spools, there's a visible decline in print quality.

I don't really feel an improvement in print quality. Some people say hardened steel has poor thermal conductivity, which can lead to layer adhesion issues, and that silicon carbide has better thermal conductivity. But from my experience, at the same temperature, the flow rate is about 1-2% higher with silicon carbide compared to hardened steel.

Others also mentioned breaking it during bed leveling, but I’ve been using it for 100-200 hours now and haven’t had any problems.

However, I don’t recommend buying a complete hotend—if it gets bent, it’s ruined. I was worried about bending it back then, so I went with one that has a replaceable tip.

Later, after less than 100 hours of use, it did get bent. So I took my original hotend, removed the throat, sawed off about 2mm myself, then put it back on. The total length of the hotend ended up being exactly the same as the original.

It says it can handle 70KG carbon fiber. Calculated this way, its cost-effectiveness is even higher than that of hardened steel. It's a pity that the nozzle can't be replaced; otherwise, the cost-effectiveness would be maximized.