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Author Topic: 3-D printer impeller  (Read 1450 times)

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Offline Heavynets

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3-D printer impeller
« on: July 11, 2017, 11:11:24 PM »
I finally got around to designing a new impeller.  Tom, I'd like to send this one, that I 3-D printed, to you so you can verify the fit / dimensions.  Let me know what needs to change.

This one is made from a weak biodegradable plastic that most likely will break under the stress.  However, there are 3-D printable plastics that I'm confident that will work.  My printer can't print them, but I've found several sources that will for between $40 and $150.

Let me know your mailing address if you want to take a look at this thing. 

Offline Painlesstom

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Re: 3-D printer impeller
« Reply #1 on: July 11, 2017, 11:19:50 PM »
Wow, awesome work. Would be glad to test fit and let you know the details.  \./8

Tom Goss
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Ludowici, GA. 31316
Tom

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Offline mosski

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Re: 3-D printer impeller
« Reply #2 on: September 13, 2017, 01:03:01 AM »
Any updates on this project?

What materials are you considering?

What is the pitch and angle of this prototype?

Cool looking,

Offline Painlesstom

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Re: 3-D printer impeller
« Reply #3 on: September 13, 2017, 12:00:58 PM »
This is the same one updated you on a few days ago. ;) http://www.improvingyourmokai.com/index.php/topic,928.msg13621.html#msg13621
Tom

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Offline Heavynets

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Re: 3-D printer impeller
« Reply #4 on: September 14, 2017, 11:43:24 AM »
I am having an impeller printed out of a carbon fiber reinforced nylon.  I should have it to Tom in a few week so he can try it out.  If it's strong enough, it will only cost about $75 or less.  I wanted to use polycarbonate. However, the cost due to its difficulty to print made me switch materials.  The carbon filled nylon is about 80% the strength of polycarbonate, but may handle gravel better.  Tom is raising money for a bronze impregnated stainless steel impeller. 

The pitch angle, as in all props / propellers, varies with the diameter.  Whether or not this design is "better" will probably depend upon the user.  Some want top speed, some want power, etc.  What you get will also depend upon the total weight of the boat with operator and modifications made to the boat.  Like Tom said, we'll just have to wait and see. 

As I have stated before, I doubt if this design will be significantly better or worse than the factor design. However, (if made from a plastic) it will be significantly cheaper should you ever have to replace your impeller. 

Offline Painlesstom

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Re: 3-D printer impeller
« Reply #5 on: September 15, 2017, 12:33:53 PM »
Oh, nice. I'm looking forward to that then. I hope it's strong enough for one good test to see if there is merit to springing for the metal print. Even if it's the same performance, and the metal version is as tough as it needs to be, it will still be an excellent option for anyone who just needs a replacement.

FYI The impeller is the same for all models 2000-current, so this will cover all models.
Tom

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Offline chads454

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Re: 3-D printer impeller
« Reply #6 on: April 03, 2019, 12:32:09 PM »
Is this project dead in the water ? :'(

I'd be in for a couple upgraded versions if they would make a difference.

Offline Painlesstom

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Re: 3-D printer impeller
« Reply #7 on: April 03, 2019, 12:43:18 PM »
Never found anything that worked better. I'm sure being plastic the true performance of each one tested was hindered by flex in the material, no way to truly get an accurate result without making them from metal. One day I might try to cast one from aluminum and see if I will be able to use it as a replacement, then at least I know there would be an option if a stock one gets damaged beyond repair.
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Offline chads454

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Re: 3-D printer impeller
« Reply #8 on: April 04, 2019, 02:41:20 PM »
Any idea what a metal prototype would cost?

Offline Painlesstom

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Re: 3-D printer impeller
« Reply #9 on: April 04, 2019, 02:54:58 PM »
Somewhere around $400 to have it 3d printed in a bronze infused stainless piece. I could cast one in aluminum for $175. Then you have to pray the dimensions were spot on and the process didn't change something out of tolerance.  With all the testing I've done I've had a few impellers that were close to matching the stock version, but I don't think the impeller profile is the limiting factor here.. It is the intake tunnel volume, the wear ring depth, and the diameter. Things we can't change. You can only move so much water through the area we have to work with, and the only way to do that is best done with rpm. It's a balancing act that is pretty much spot on were it's current at.
Tom

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