Portable Reverse Helix Gold Trommel

About: I am a teacher who enjoys environmentally responsible woodworking. Most evenings will find me in the shop working with my now 8 year old son Shay who is both my greatest helper and biggest fan.

Building a reverse helix trommel isn't just something you wack together after checking out an instructable.  They are all essentially custom made and I would recomend you take some time to look over various designs, not just ours, before building.  Some things just don't scale down and water is one of them.  I have seen these badboys in action lots of times at gold and sapphire mines but getting this little one of mine to work in the rugged low water conditions we work it in has been a trial and error process.  It is getting there however.  I have included all of my trommel stuff in this instructable, from our first build and test up to the last mining season.  No breakdows other than a burned out motor from water seepage.  The results improve every year so follow our journey and save yourself some of our baby steps.  Happy hunting!



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    3 Discussions


    5 years ago on Introduction

    Great love it ur voted for and i hope all the gold getters win


    5 years ago on Introduction

    reverse helix bring gold back to the top (front) and drops gold and heaves under hopper. via groves like a screw . An easy way to make this part is a big piece of pvc pipe cut roughly 1" continuous cut while spinning pipe. will end up with a big slinky then fix it to inside of trommel so gold will climb to the top.


    You might also check out the youtube comments, mixed in with all the Discovery Chanel 'Gold Rush' cowboys are some ideas from very knowledgeable people, hints and tricks that would make a new machine better than ours.