Making my own classifiers

[Shake n Flake]

I want to make my own classifiers, because store-bought is too expensive. The problem is that getting mesh for the smaller sizes is almost as expensive as buying the ready-made equipment, because when I find the mesh I'm required to place a minimum order that raises the total price (and gives me far more mesh than I need).

Here is the mesh I have found so far: 1/2, 1/4, and 1/8" by the foot at Ace Hardware; 1/16" in at OSH; various colanders, screen doors, etc I estimate to be about 40 mesh (but which isn't specified because it isn't important to most of the people who buy it). Since we seem to be finding (and losing) a lot of flour gold, I want to get mesh for 50-200.

Suggestions?

 

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[Astrobouncer]

I dont know, but I found this info which might help you, talking about screen sizes:

A standard screen size used today for windows and pool enclosures is a rectangular 18 x 14 mesh. That means: rectangular square mesh openings woven with 18 warp (length) wires and 14 filler (width) wires to the inch. In the past a 16 x 16 screen was commonly used, but in recent years the 18x14 mesh has become the standard in the screen builders industry. Other sizes are 18x18 and 20x20. There are several other rectangular sizes as well.

 

[greydigger]

I have always been confused about classifier sizes.
1/4",1/8" I understand.
Then you get to numbers.
Sandpaper and other grit abrasives go by how many holes there are in a square inch.
I thought.
But #10 is only .072 in classifier size.
Window screen is .057 X .042 in hole size.
They call that #20.
#100 is .0055"
#400 is .0015"
Not sure what a coffee filter mesh rating would be?
I guess molecular sieves might work for really small stuff.
Don't sneeze.
Grey

 

[Shake n Flake]

There are several mesh manufacturers out there, but they have minimums they'll sell directly. I need 2 sq. yds at most.

 

[extractor]

Try this place http://rds.yahoo.com/_ylt=A0oGdCoov...hts/EXP=1277497256/**http://www.mcmaster.com/ Master carr, They have a lot of perf ,They mignt also have a rem around.

 

[Shake n Flake]

Extractor, PERFECT!!!!!!

 

[extractor]

Glad ya liked it. Let us know how they turn out when your done. Ex

 

[TerryC]

Try this place http://rds.yahoo.com/_ylt=A0oGdCoov...hts/EXP=1277497256/**http://www.mcmaster.com/ Master carr, They have a lot of perf ,They mignt also have a rem around.

Great site Extractor. I added it to my bookmarks! TTC

 

[extractor]

Glad you liked it Terry, I have it in my favorites also .

 

[Shake n Flake]

So, next question: how fine should I go? The finer the screen the higher the cost, but a lot of folks here state that classifying is the key to gold recovery. I'm thinking 40, 80, 150, and 400.