Needle wheel Pump Rotors - Page 2 - DIY Aquarium Projects - Aquatic Plant Central

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Old 01-30-2008, 08:20 AM   #11 (permalink)
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Default Re: Needle wheel Pump Rotors

Small isn't necessarily better than large for these holes. It is the material left behind that seems to be the important thing. It is that remaining material that chops up the bubbles.

Generally I would always rather drill a hole than melt one with a hot needle or nail. But, I have been hearing so often that melting holes is easy and works like a charm. I wanted to try it and see for myself.

One problem I have had when drilling holes in plastics is that the drill bit can catch on the plastic material and either break or, much worse, break the plastic. A hot needle or nail wont do that. So, I have to say, both ways to make holes works, and both have advantages and disadvantages.
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Old 02-01-2008, 05:05 AM   #12 (permalink)
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Default Re: Needle wheel Pump Rotors

I was just surfing around for DIY Venturi pages when I stumbled upon this. Very interesting:

http://www.randystacye.com/diythreadwheel.htm

Just thought I would share.
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