Jump to content

Recommended Size Classifier For Keene A52 Sluice

Recommended Posts

I could use some advice, I'm running my Keene A52 Sluice in a gravel creek, I've tried the Keene BLUE CLASSIFYING SIEVE NO. 002 MESH which is 11.5mm, it seems to let too much bigger stuff through to run directly through the sluice nicely but Keene's are stackable so I was thinking of getting a smaller size for under it.  I was wondering if anyone has a suggestion for the optimal sieve size for the A52? 1/4" seems like it could be the way to go? Do you recommend stacking the things? does it make much extra work or would I just be better off starting with the size I want to finish with? 

Thanks for any assistance.



Share this post

Link to post
Share on other sites

Kinda depends on the size gold in your area.... If everything is smaller than a 1/4 inch no need to do the extra work of double classifying. 

If your working a bank you can set up a 3' x 4' frame with 1/4 hardware cloth and shovel onto it.

collect the classified material under it in a crate or on a tarp the bigger stuff rolls off onto the ground.


Share this post

Link to post
Share on other sites

Thanks for the info, as far as I've found the area only has tiny gold, biggest pieces are a under 3mm in size so a 1/4" classifier is the way to go? 


Share this post

Link to post
Share on other sites

Maybe even 1/8.

The golden rule is .... If everything is the same size, Gold rules.

So the closer you can get all the material to the size of the gold your after the easier it will be to catch the gold.

You may also have to change the riffles in the sluice to something that can deal with small heavy material... Standard riffle will clog and become ineffective.


Share this post

Link to post
Share on other sites

Thanks for the advice! very much appreciated.


Share this post

Link to post
Share on other sites

No problem... Happy to help if I can.

Here is a thread that may give you some ideas ... 


  • Thanks 1

Share this post

Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now

  • Similar Content

    • By kiwijw
      Hi there RR, All this gadget is doing is mechanically classifying material into a gold pan. Nothing you couldn't do with a manual classifier over your gold pan which you could possibly get away with. I know with my sluice boxing I made & use a bucket classifier than can process a lot of material pretty quickly to feed down the box. 
      Clean up time

      Good luck out there
    • By idahogold
      Super Cool! If it can handle the punishment of Hardcore Diggers? Enjoy! Cheers, Ig
    • By Steve Herschbach
      I tripped over this extensive article, available as a free download. Here is the abstract:
      The article sets out to clarify the special character of the North American gold pan and why it remains so popular – in spite of widespread dissatisfaction and many modifications and innovations. The North American pan is distinctive in being circular with a flattish floor ringed by an outwardly sloping wall. Its identity is confused by over-use of the terms 'pan' and 'panning'. The North American pan gyrates in a distinctive orbital motion driven by both hands of the panner. Although many other motions are resorted to (tapping, to-and-fro, tilting, and tick-tock), it is the orbital motion and flattish floor that together distinguish the pan from most other hand-held gravitational devices. In spite of its enduring popularity, no scientific tests have been published on the North American gold pan or for any of the innovations covered by 30 US patents awarded since 1861. It remains unclear if the North American gold pan is more efficient at recovering fine gold and flat gold than is a lotok, batea, dulang, ninja bowl, grizzly pan, mat, bucket or any other sort of hand-driven gravitational device. Some innovations are long-forgotten but merit attention. For instance, bars to keep the panners hand clear of the water, cables to hold large heavy pans, and several pans designed for panning without any water. Traditionally the North American gold pan was a combined digging and washing device, but today most models are not designed for digging and require a spade to be used. 
      Gold recovery in Gold Pans -the term... (PDF Download Available). Available from: https://www.researchgate.net/publication/313562132_Gold_recovery_in_Gold_Pans_-the_term_'Panning'
    • By M1dn1ghtN1nj4
      I have been working on this for a couple weeks.  It's a collapsible, customizable, self-contained, super light, 3D printed sluice box!  I know there are other folding sluice boxes, but none of them actually fit in a backpack, or are light enough to carry in one hand.  This solution would be EXTREMELY helpful!
      I'm on my phone trying this, so when I get to my laptop, I'll write in a bit more.
      So I'm currently in the CAD stage.  I have a guy that does 3D printing for me, and his machine is limited to 12"x12"x15" so I might have to shrink the size of the project down to fit, as I don't have access to, or can even afford, a larger 3D printer.
      I have this up on Patreon to attempt to raise some funding to start getting prototypes printed, and boost this project towards the finish line!
      This is my Patreon page:
    • By Sourdoughmoe
      Check out my new setup for those remote areas where gas powered engins aint allowed

    • By Steve Herschbach
      I took a picture of my collection of crevice suckers for the Classifieds and figured it would make a good photo to post here for people to see a few designs old and new.