Inside the Iwaki MD-20RZ
 

http://users.bigpond.net.au/volenti/iwaki_apart.jpg

http://users.bigpond.net.au/volenti/iwaki_apart2.jpg


It comes apart cleanly and easily, with no small washers or anything to loose or put back on the wrong way.

http://users.bigpond.net.au/volenti/iwaki_apart3.jpg

Both the pink axel and the white thrust plate are some kind of ceramic.

http://users.bigpond.net.au/volenti/iwaki_apart4.jpg

http://users.bigpond.net.au/volenti/iwaki_apart5.jpg

The impeller is a blades within disk design, notice the lip on the plastic around the intake on the impeller, that mates with (small clearance) a groove on the impeller housing, which helps to prevent water short circuiting under high head loads

http://users.bigpond.net.au/volenti/iwaki_apart6.jpg

The small black peices are not rubber but yet another kind of ceramic.

http://users.bigpond.net.au/volenti/iwaki_apart7.jpg

Thanks for the nice pics, much better than the drawings always posted. Whats that white material between your heatsinks/motor housing?

peace.
unloaded

ahh it's just a generic silicone based heat transfer compound.