DIY stainless impeller shafts

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thacarter546

Gambusia
MFK Member
Aug 26, 2008
251
17
18
Midwest
So I have been doing this for about 3 years now. I know it works, but do so at your own risk. For all of my filters that use steel impeller shafts I measure the diameter of the shaft 3 times with a decent digital caliper. Just to make sure I get a solid measurement. Then I order model plane propeller shafts in the same diameter. I usually get 6-12 12" sticks for about 15 bucks. They are 316 stainless with a tight tolerance and pre polished. I then cut them to length with an angle grinder, round the ends slightly with a bench grinder, and call it a day.
 
Interesting ideal but what filters use raw steel shafts? That seems insane
 
I'm saying what sort of water pumping device come's out of the box with a steel impeller shaft and requires replacing.

Every one I've seen is stainless or ceramic
 
I should have said stainless. My Renas go through 1 a year or so. Which I consider acceptable. I just hate spending 20-40 bucks on a 316 shaft. Aquaclears I got so sick of buying impeller shafts. I bought about 16-18 before I started making them Hagen replaced 1. Ended up throwing every aquaclear I owned away. Only thing I'll buy from Hagen now is Fluval specs (I like the internal sump way too much. Various marineland shafts can be done, but there are a couple extra steps.

Ceramic shafts can be done this way too, but what's the point? Every ceramic shaft has lasted me years.

I have also done ceramic shaft mods to replace stainless shafts in a couple filters with mixed results. Cutting them is risky business and even if done right depending on the filter they may or may not last.

I refuse to do any modification to my eheims however (with the exception of replacing the volute cover on my 2260). Mostly because as is they just run reliably.
 
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