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rjcjid

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rjcjid last won the day on February 12 2015

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About rjcjid

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  1. rjcjid

    Reverse Helix Recovery Systems

    GW, I have a 2 ft dia. pipe that I have been thinking of using for a reverse helix cylinder. I am thinking of talking to a local machine shop to see what they would charge to roll a 1/2" square bar into a coil to fit the cylinder. Have you done any checking along this line of thought? RJ
  2. rjcjid

    Reverse Helix Recovery Systems

    Geowizard, Update on your reverse helix trommel? RJ
  3. ChickenMiner, I would agree that they would most likely be a very high wear item, but the ripper teeth on a Dozer are a high wear item as well. I've been on a bucketline dredge when it was scraping bedrock, every passing bucket rocked the dredge. I can't imagine what kind of reaction there'd be if a ripper was added to the buckets. RJ
  4. rjcjid

    Reverse Helix Recovery Systems

    Interesting about the router bit. On the lathe the bits are ground different for plastic for this reason. Talk with a machinist with experience with cutting plastic.
  5. rjcjid

    Reverse Helix Recovery Systems

    GW, The hot wire and PVC rollers are good ideas. On the original idea have you thought about using a router. One advantage to the router is that you don't need to deal with adjusting the angle of the saw blade and I think, all in all, the end product will produce a smoother finished edge than you would get using a saw. The advantage of the hotwire is that you could set up several hotwires on the same plane, still using your PVC rollers, and cut multiple flights at the same time by rotating the cylinder through the hotwires. You would probably need a flange on the driven end to rotate and advance the cylinder through the hotwires and when you get to the end where the flange is you just stop the advance but keep rotating until you cut the flights free from the flange. RJ
  6. Does anyone know the values/cu yd recovered on Little Creek? The Mindat reference says that a exploration shaft to bedrock indicated 1-2 cent/sq ft bedrock. if I calculated it correctly at 13 deep at $1250/oz (it was $19/oz in 1915) that should come out to $17.75-$35/cuyd.
  7. rjcjid

    Reverse Helix Recovery Systems

    Geowizard, Ha! Now I understand. As the saying goes, "A picture is worth a thousand words." My only thought now to keep the cylinder from relaxing and to retain ridgity would be to support the interior of the cylinder. I remember receiving items that I were shipped to me in boxes that had bags in them filled with foam. The foam was the expanding type that had molded around the items in the shipping boxes. I wonder if that may not work for you in this case. In the end you are able to pull the plastic wrapped foam out and use it again if you wanted to try a different pitch for your flights. I've used the A/B mix polyurethane expanding foam. You wouldn't necessarily have to fill the entire interior space of the cylinder. You might put an stove pipe or?? inside the cylinder and just fill the annular space with foam. RJ
  8. rjcjid

    Reverse Helix Recovery Systems

    Geowizard, If you are cutting two flights at the correct pitch, you will use all of the pipe, no waste, and initial pipe can be half the length if you splice the two flights together end to end. Obviously your pitch, blade angle and blade spacing will have to be adjustable variables, as well as carriage travel relative to the cylinder rotation. RJ
  9. Geowizard, I've seen a lot of bucketline dredge buckets and used to operate the dredge at Platinum AK. I've never seen a dredge bucket with something along the lines of a ripper tooth attached. I would think a ripper tooth of 4" to 6" deep would work good on bedrock like sandstone or shale/slate. Your thoughts? RJ
  10. Thanks Geowizard, Really enjoy reading your posts. Always informative and interesting. RJ
  11. rjcjid

    Reverse Helix Recovery Systems

    "The catch; There is a problem when you cut a spiral in a tube! After the first cut, the tube relaxes so that the second cut which must be offset precisely from the first cut becomes impossible because the tube is no longer rigid. So, longitudinal 2x2's are cut to length and screwed to the inside of the tube to make it rigid." Possible answer.... Putting two, appropiately spaced saw blades on the same shaft, that is, if you are cutting for a two flight helix. I envision using your frame with a piece of all thread attached to the frame as the drive shaft for a carriage that holds a modified skill saw with two appropiately spaced blades. The all-thread and the 16" cylinder are connected via sprockets and chain to acheive the desired carriage travel per inche of cylinder rotation. Acheiving the appropiate travel per travel per inche of cylinder will be the biggest challenge. The first blade has only cut half way around in the cylinder rotation when the second blade begins to cut the second flight, so the problem of tube relaxation and loss of rigidity should be greatly reduced. Also you don't necessarily have to start your cut at the end of the cylinder but could start with a plunge cut an inche or so from the end which would also help with regards to relaxation and rigidity.
  12. Geowizard, In April you mentioned a plan for developing a lode mine 4-5 miles from Ophir. Any update on that, that you can talk about?
  13. Geowizard, You have studied the Ophir/Ganes Creek area. I imagine that you have seen/studied the bucketline dredge tailings. Do you believe that the dredges were efficient in tearing up the bedrock to get the gold? Is there a lot of bedrock on the top of the tailings piles? How easily is the bedrock in that area ripped? Thanks, RJ
  14. rjcjid

    Reverse Helix Recovery Systems

    Geowizard, Will your helix have one or multiple flights? RJ
  15. Sorry didn't see the follow up pages. Please disregard my previous post.
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