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13th August 2013, 11:43 AM #16Intermediate Member
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- May 2012
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- melbourne
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- 43
Thanks - bought the pump
Looks like what's needed, head and volume, I'm hoping the stated volumea typo is "per min". 120 L/H doen't make sense
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13th August 2013 11:43 AM # ADSGoogle Adsense Advertisement
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13th August 2013, 12:03 PM #17
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13th August 2013, 12:07 PM #18Intermediate Member
- Join Date
- May 2012
- Location
- melbourne
- Posts
- 43
A little "Round TUIT" EDM info
Maybe the ex Ballarat Potteries unit is not really an EDM machine. They are also "Metal Destructors" which are specially made for removing broken drills and taps etc. I'm not sure what the difference is, I imagine the "destructor" is higher power with simplified controls. An EDM die sinker is often used for tap removal, but that's not its primary purpose.
I've seen "destructors" used on Youtube (look for "tap removal"), what I've seen looks like an EDM head mounted in a radial arm drill like device. Big enough to take big castings, engine blocks and so on, but with precise x,y positioning, good enough so you can remove the tap body leaving the flutes to be picked out by hand.
Re electrolye - The destructors seem to use a water based electrolyte, cheaper I guess, and not so big a problem if you lose a bit. EDM sinkers generally use a petroleum based electrolyte, a hard to ignite oil, originally kero was used, but that has been replaced by friendler, safer oils (now synthetic oils too) - kero is still used in the third world apparently, it works well, is cheap, but stinks, can be unfriendly to the operator and is more likely to catch fire is the fluid level gets too low
There's a bit of info online (Google EDM Technologies Inc. as a starting point)
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13th August 2013, 01:52 PM #19Senior Member
- Join Date
- Oct 2011
- Location
- Newstead Victoria
- Posts
- 459
In those days 240 v submersible pumps were astronomic in price why I went with the 12v and safety.240 units thanks to the far east imports have made them cheaper.
The round to it plate was a celebratory product made by Bendigo Pottery as am sure was their centenary. The plate of course being round is inscribed ''a round to it'' all one word.My sister thought it was an appropriate gift as I always have some thing here to do when I get round to it
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