Hoover Elite 20 Blade Fan Impeller

This is a model of the 20 blade Hoover impeller for Elite model vacuums and possibly others, I found a soft and light vacuum at the thrift store and wanted to restore it. Hoover discontinued production on these and I had a difficult time finding a place to order it. The one's I found were pretty high so I tried to recreate it here. I only had the original 7 blade that was in the fan so the model isn't 100% perfect I'm sure. I used the original fan and photos of the 20 blade to try and recreate it. If you have a 20 blade and care to improve on this, I attached the SLDPRT so you can remix it if you want. But I believe this is very close and it works great in the vacuum so I'm pretty happy with it. I don't know what long term durability is going to be like but we'll see and I may make adjustments as I test it out.

You will need to buy a 5/16-18 left hand thread nut that will press into the matching slot in the top of the impeller. It should press in as you tighten the fan down also. I put a link to the ones I bought but you can certainly find this cheaper if you take the time to find them. I just wanted the Prime shipping. These are the ones I ordered: https://www.amazon.com/gp/product/B00L1L7DTI/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&th=1

I printed this bottom side on the bed with normal supports. If you print with the bottom side on the bed, you will have to have supports but these may be easier to remove if you use tree supports. Make sure you clean the part pretty well after removing the supports. Tolerances are really close so any stray support material will be an issue. I used some sand paper and just very lightly went over it. You just want the support material cleaned off. I printed this in ABS as I assume it will absorb a lot of heat from the motor but this may not be strictly necessary so you can try a different material. I also printed this at 100% rectilinear infill. this really needs very good layer adhesion and structural integrity because everything you vacuum comes in contact with this and if you go very sparse on infill the blades will snap off. I haven't done any testing other than a test model with 10% infill and it broke immediately but you're welcome to experiment if you want to try lower infill. 

If you experiment with printing this part please report back your findings. I really think it's important that we keep these old vacuums out of the landfill and very few people will appreciate these old vacuums. Any information and help is very helpful to someone looking to keep these going as information is very sparse about these old hoovers.