Tunze drive unit

[Mimbler1]

Roger, I have had a couple of drive units for my Tunze powerheads fail by stripping out the ridges that the brake shoes act on. This allows the impeller to spin freely on the magnet. I have no idea why this happens, as it never happens on my Streams. The failed drive units have seen service in a basic Tunze powerhead, and an electronically controlled one (I switch drive units around when I clean them), so I don't know which is actually damaging them.
Anyway...do the electronic powerheads actually need the brake devices, or could I use the failed drive units in my electronic tunze powerhead by just locking the two sections together with glue, and omitting the brakes?
thanks, Mike

 

[rvitko]

Actually Mike, that was one of the cooler things I got to see in Germany. The electronic pumps do not need brakes. We now have a brakeless one piece drive unit for them. They are still in testing, I have a handful I brought back with me. What you describe though is a defect and should not occur, the plastic was not cast thick enough, the magnets are particularly tricky since the plastic has to be injection molded into a magnet, it isn't like just molding a part since the magnet has to be in the mold. The conventional pumps though do need the brakes but we are working on that too as it would simplify things and speed up assembly to have fewer parts.

 

[Mimbler1]

Thanks Roger, that's how I thought it should work with the electronic ones. I'll try glueing a failed drive unit together without the shoes and use it in my electronic pump unless you think I'm missing something,
regards, Mike