building a sifter (classifier)

NICE! THANX TOOL

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depending on what you are going after is what size mesh to use if your sifting for coins or artifacts 3/8 inch holes are small enough if your looking for gold then you want to make a few with different sizes down to about 1/8 inch and keep the different size material separate to work the concentrates the larger materials can be checked with a metal detector for gold.  I like to run my materials through a 1/4" mesh before feeding it into my sluice or pan, larger nuggets than 1/4 inch are easy to see and you don't want one of them making it through the sluice box

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thanks...

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When I am prospecting for gold I stack 2 different classifing screens. The top one is 1/4" mesh and the bottom one is called a #12, i.e. 12 holes to the inch. Being the greedy bugger that I am I stack them over a 5 gallon bucket and wash everything through the screens then sluice what is in the bucket, but I always like to check what is in the screens with a m/d. Who knows what is inside that junky looking rock...

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		Quote:			Posted by toolboxdiver
	building a sifter or classifier is a simple as making a square or rectangle oiy of 4 pieces of 1 X 3 and adding screen or wire mesh to the size of material you want to pass through.

How about a pre-made sifter, for heavy duty use?

I made one for panning, by taking a nice yellow pop crate and putting 1/4 inch hardware cloth, in the bottom, I brought the hardware cloth about 4 inches up the sides, then I took light aluminum siding. and *shingled* it over the screen, so the screen was covered, on the sides, by aluminum sheet, and only the hand holds were left open. The whole ting was pop riveted together, using large, nickel size washers (with small holes.)

I could fill this about 1/4 full, and chouse and shake it in a tub of water... all the heavies go through, well.... when the tub got too full, I quit screening and panned. The rest of the time it carried stuff like a trowel, a small pan and so on.

I built a wood one (large  staples) but never used it for gravel.... it makes a great blue-berry sifter, the immature ones go through, as well as most leaves. It is too nice to get wet and dirty! 

goldigger (darn echo!)

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