Hi everyone, I received my two high flow nozzles today.
Before I install them, I wanted to ask if there are any downsides compared to the standard nozzle, such as a loss in precision or any other disadvantages?
Thank you
Somebody has to test it. You might be the first one and we are curious about the findings 
The biggest drawback is probably the price?
I’ve wondered if retraction works as well in high-flow nozzles. If you think you can tell, let us know.
You are not supposed to use them with TPU 90 or 85
1 Like
They tend to ooze more compared to standard nozzles, as retractions are harder to execute with a 3 holes filament path.
I put in my HF nozzles as soon as the printer arrived and never looked back. My standard 0.4mm nozzle are still unused.
And did you notice any advantage in print time or part strength?
Yes 600mm/s infill with no problems, and bumping some draft prints to ludicrous speed with no problems.
If you tried that with standard nozzles, you would see failures right away.
600 mm/s is only possible for large parts, right? For small parts you never reach this speed because acceleration is the limiting factor?
Only two potential drawbacks.
- If the printer has insufficient cold zone cooler, then heat creep may occur.
- HF nozzles usually require a slight bump in the temperature which may result in a worse overhang performance (not necessarily the truth, if part cooling is sufficient).
Usually pros of HF nozzles outweight any negatives. Especially with PETG printing.
I never bump the temp on my HF nozzles, and i have over 8000 hours of printing every kind of material under the sun through them.
Yes on smaller prints you will not see the 600mm/s due to acceleration. But when you bump to ludicrous mode all speeds are increased by 166%, and acceleration is bumped to max 16k.
What printer are we talking about?
Lol, ludicrous mode is garbage, try to print a cylinder and fail miserably. Not sure how’s that related to anything I said…
Sorry was replying to you and the second paragraph was a reply to the previous poster. I used to print on ludicrous often with my P1, X1 and now on the H2D with high flow nozzles, no problems here. I use it for drafts/prototype items mainly, would not call the quality garbage either.
I see, that makes sense. I was like, wtf this dude is talking about… lol.
Well, see, I said “usually”. I had to bump it up about 5C for PETG to get rid of infill crumbles. But this is in comparison, material to material, nozzle to nozzle. Your PETG material may be different and doesnt require so.
H2D is naturally calibrated to HF nozzles, AFAIK, so it doesn’t need that.
1 Like
Yes that is true but for smaller items where it could not reach the 600mm/s infill speeds, it was helpful to bump to ludicrous to increase the acceleration speeds and get a faster print. Larger items on X1/P1s with Obxidian I would get failures on ludicrous (even if I bumped the temp by 10c) as I had the max flow tuned already, but the H2D HF nozzles just chug along with no problems on standard temp. There is a lot of overhead left on the H2D HF nozzles.
1 Like
I printed two Benchies with the same settings.
The filament is Bambulab PLA Matte White.
The filament was not dried.
There are only slight differences — the left one is Standard, the right one is High Flow.
With the Standard nozzle, there is slight under-extrusion.
With the High Flow nozzle, stringing is visible.
it doesn’t work too well on mine. purge lines sometimes would have dragged tail bits on to the print. I feel like I might need to tune the retraction settings, unfortunately it’s not available on H2D (not in BS, not supported in Orca either)
I mean you don’t have a good way to test it, like no retraction tower generator.
1 Like
In regards to “tail bits on to the print”, a prime tower should fix that issue. I have a lot of those with HF nozzles and dual material prints due to oozing before the guard snaps on, but they are all stuck to the prime tower. It does an anchoring routine when it first start to print on the prime tower after a nozzle swap.
yes, i can even just use a skirt line, but I don’t feel like to because I feel it should be either enabled by default or fixed in default retraction settings by bambu. I’m saying this understanding that I’m merely a paid beta tester but this is my two cents 
1 Like