DIY Red Dragon Pumps, gathering ideas.
- Thread starter hahnmeister
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miwoodar
Likey the bikey
I don't know about using titanium for this but I can say carbon fiber might work. My maxi-jet mods are 2.5 years old and the carbon fiber shafts still look brand new. If you would have asked me then to guess how long they would last and I would have confidently offered up 6 months, tops. (carbon fiber tubes spinning on a carbon fiber shaft FWIW)
miwoodar
Likey the bikey
Oops. I thought this was your impellor and you were working on one of the smaller Laguna pumps that have the through-shaft. Sorry, I can't imagine how to replace the shaft on one of the larger pumps since the magnet and the shaft are essentially one piece - it's not like any pump or powerhead I've ever owned.
JCTewks
In Memoriam
Wow, sorry custom and dew, I somehow missed your questions.
No, the old style 2000 is the same as the new style 900...they have to have the shaft support to work correctly. If you can get a volute made, the 900/2000 will draw around 60scfh at 32-35w.
yes, the motorblocks are the same physical size, other than that the 2 are completely different (except for the magnet/shaft). The 4200's volute is the full 3.5" dia of the mounting plate, the inlet/outlet is slightly larger, and the impeller blade is a larger diameter. Also, with just the magnet in, the 7000/2000/2400/2900 motor draws 24w and the 4200 motorblock pulled 44w, so the windings are definitely larger than the 7000 too...I've noticed that in testing as well, the 4200 will handle much larger pieces of mesh than the 2000 motorblock. The 4200 also does not appear to have the PF correcting circuit inside of it either as I've seen the PF as low as .30.
No, the old style 2000 is the same as the new style 900...they have to have the shaft support to work correctly. If you can get a volute made, the 900/2000 will draw around 60scfh at 32-35w.
yes, the motorblocks are the same physical size, other than that the 2 are completely different (except for the magnet/shaft). The 4200's volute is the full 3.5" dia of the mounting plate, the inlet/outlet is slightly larger, and the impeller blade is a larger diameter. Also, with just the magnet in, the 7000/2000/2400/2900 motor draws 24w and the 4200 motorblock pulled 44w, so the windings are definitely larger than the 7000 too...I've noticed that in testing as well, the 4200 will handle much larger pieces of mesh than the 2000 motorblock. The 4200 also does not appear to have the PF correcting circuit inside of it either as I've seen the PF as low as .30.
sorry didn't get the response on here, the titanium would work great, thanks for the offer 2_zoa.
, I haven't had time to get a measurement on it yet, it will have to be guestimated as I don't have a micrometer here.
I dropped the impeller on the concrete floor when I was fiddling with the volute and it broke the ceramic shaft, but it actually broke inside of the magnet so I can pull the impeller out of the magnet with about a 1" piece of ceramic attached.
I would have to drill the entire ceramic shaft out as I think its pressed in the magnet as well as the impeller.
JC, I was asking about the magnet to see if I could just buy a new 2900 impeller and save about 10-15 bucks, since its just getting ground off and meshed anyway.
I put the shaft back in the magnet and superglued it and so far it seems to be holding up fine, but I'll definitely take you up on your offer for a more permanent fix.
thanks
, I haven't had time to get a measurement on it yet, it will have to be guestimated as I don't have a micrometer here.
I dropped the impeller on the concrete floor when I was fiddling with the volute and it broke the ceramic shaft, but it actually broke inside of the magnet so I can pull the impeller out of the magnet with about a 1" piece of ceramic attached.
I would have to drill the entire ceramic shaft out as I think its pressed in the magnet as well as the impeller.
JC, I was asking about the magnet to see if I could just buy a new 2900 impeller and save about 10-15 bucks, since its just getting ground off and meshed anyway.
I put the shaft back in the magnet and superglued it and so far it seems to be holding up fine, but I'll definitely take you up on your offer for a more permanent fix.
thanks
hahnmeister
In Memoriam
If the PF is .30, then you are beyond the ability of the PFC circuit. The PFC circuit was designed to help in normal operation, but if you put the pump in situations where its not even in the ballpark, it cant help much. You are simply outside of the PFC's operation range.
JCTewks
In Memoriam
Sorry guys, I was just corrected in a PM that the 4200 and 2000 are different size motor blocks. The 7000 that I have must be larger than the 2000 motorblock. So, I'm not sure if the 2000 impeller will fit in the 4200. I have a 2000 coming this week (hopefully
) and will be able to check for you when it gets here!
Jon, since the 4200 I have is a maxFLO (do they make a powerjet4200?) will it have the circuitry in it? what is "normal operation" range for PF?
) and will be able to check for you when it gets here!Jon, since the 4200 I have is a maxFLO (do they make a powerjet4200?) will it have the circuitry in it? what is "normal operation" range for PF?
hahnmeister
In Memoriam
Max Flo and PF motor blocks and pumps are the same. The difference is with the other parts they get bundled with... cage, fountain nozzles, etc...
JCTewks
In Memoriam
That's what I thought, but I wanted to be sure...I know you and others have more experience with these pumps than I do 
So, Jon, Is there a difference between the old style 7000 and the new style 2400? Mavgi said they are the same, but I was told by someone else (with pictures) that the 4200 and 2400 are different sizes...the 7000 I have appears to be the same size as the 4200 (physical size), although I have not taken measurements. Side by side the look identical though!
So, Jon, Is there a difference between the old style 7000 and the new style 2400? Mavgi said they are the same, but I was told by someone else (with pictures) that the 4200 and 2400 are different sizes...the 7000 I have appears to be the same size as the 4200 (physical size), although I have not taken measurements. Side by side the look identical though!
hahnmeister
In Memoriam
4200 is a different motorblock than the 2000-2400-2900 motorblock.
Are you sure its a 7000 motorblock? There was a 10000 as well. I dont know much about the 4200's 'history'... mostly the smaller models.
Are you sure its a 7000 motorblock? There was a 10000 as well. I dont know much about the 4200's 'history'... mostly the smaller models.
Young Frankenstein
New member
has anyone use square pins in a needle wheel ?
yeah, I don't remember who now, it way have been spazz's early stuff, as well as someone else who did it on a CNC the square pins were orientated in a diamond shape to chop up the water better....Not sure at the speeds we're talking if it acted any differently or not, but it would work at least as good as a round pin IMO
JCTewks
In Memoriam
There was no sticker on the pump...mavgi gave it to me and said it was a 7000. So all I can go by is what Michael said
But, I have a 2000 coming this week to play with.Anyone got a good link to buy the 4200 impellers? AZponds doesn't seem to carry them (at least not on their site).
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