The CrazyCrusher brand Rock Crusher is 100 percent steel, and it is 100 percent made in the U.S.A. by 100 percent Americans! The jaws are made of 3/8 steel, and the face has horizontal welds across them that not only help grip and pull down rock pieces, it also prevents wear on the actual jaws. On the moving jaw, vertical "teeth" were added to help dig in and crack the hardest rocks! The adjustable jaw moves from a 1/2 inch opening to all the way closed, for that final grind to get your samples as small as you can for testing. The very bottom of the jaws is what does the "grinding" of the rock into sand sized particles and smaller, some so small it is "air borne". Eventually, like all things, the jaws can wear away, but with this style of adjustable jaw, you can keep moving it in tight for a long time!
Although this item was first invented and patented for crushing ore in the field, this handy machine has also been discovered by a different group of users for the purpose of crushing glass for artwork, also known as "frit glass" which ranges in size from an uncooked grain of rice and finer. The Crazycrusher works perfect for this! The user gets to control the size more accurately due to the crushed glass falling out of the crusher in lieu of being in a pestle and mortar and just re-crushing everything by pounding sand." Especially for those artisans who work with large quantities of glass, they can do it better and faster with a handy Crazy Crusher!
USING THE CRAZYCRUSHER The smaller the rocks, the further down it will go into the jaws, and the easier it is to crush it finer. The upper part of the moving jaw is primarily a forward and back motion, whereas the lower part of the jaw is primarily an up and down motion. NEVER operate the CrazyCrusher with the steel safety plate open! Initial breaking of rocks can and will cause chips to fly out of the top. The safety plate is designed to keep the chips inside the crusher where they belong not in your eyes! It is highly advisable to wear good leather gloves or mechanics gloves while working this rock crusher to avoid getting blisters. A catch container is included with the rock crusher. Start with the adjustable plate fully open by turning the adjusting screw counter-clockwise, then turn it in a couple turns. Open the safety plate, put your rock(s) in, close the safety plate and press down on the handle harder and harder until it breaks. If it does not break immediately, give it a few "slams" up and down, putting some weight behind it. If you plan on grinding the rock to a fine sand, have the classifying screen handy in a pan or something. Once no more pieces are coming out, dump your catch container into the screen and shake the screen. What does not go through the screen and into your pan can be dumped back in to the crusher after you put your catch container back under the crusher and turn the adjusting screw clockwise to about a 1/4" gap between the lower jaw area when the handles are in the down position. Pour the remaining rock particles back in from your screen into the jaws, close the safety plate and work it again, repeating the process until all the sample passes through your selected screen. To grind a sample, or to grind black sands for further processing, simply close the adjustable jaw until it is resting against the moving jaw. Raise and lower the handle a couple times to assure it is closed all the way and you have full movement of the arms. Starting with the handle in the down position, pour in a few tablespoons of black sands into the CrazyCrusher, and start working the handle up and down until no more sand is coming out. Short choppy strokes work better than full strokes. A grinding operation will create small amounts of ai-borne dust. It is ALWAYS important to either wear a dust mask or be sure to be up wind of the dust. The reason is that you do not know what is in that rock! There could be arsenic and other nasty things in the ore so you don't want to be breathing in that dust! A dust mask is important, especially when using a drywasher! There could be Haunta virus in the sand, mercury you never know, so please wear a quality dust mask!
If you decide not to take your crusher out in the field to crush ore samples on site, then as you collect samples, mark them with a reference number, Location #1, #2, etc., and make a notation on paper of that number, and include the GPS coordinates of the exact location you found that particular sample.
After collecting samples from many places, and when you have time to crush and analyze the ore, you will know without a doubt where you got those samples! It's advisable to get several plastic containers that you can put your crushed ore in, with a larger piece of the ore to identify the rock your material came from. This way you can crush dozens of different samples, store them together and run your tests later down the road. You never know what you will find inside that particular rock, and knowing where you found it is invaluable. If only the miners and prospectors in the olden days had had a GPS there would not be any "lost mine" stories to read, or to look for!