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manual abstract
It generates a slight humming sound. The motor becomes hot to the touch. This is normal. 1. Make it accessible. You will need to open it daily, in some cases. 2. Locate it near a power outlet. It must be located in an open area that is away from any flammable materials. Do not use the Rotary Tumbler outdoors. 3. Do not put the tumbler on a table. The vibration of the unit may cause the tumbler to crawl when placed on a smooth slippery surface. 4. Only use the tumbler in an extremely safe location such as a concrete garage floor. 5. Do not put it in a closet or drawer as it has a fan cooled motor and needs proper ventilation. 6. Do not let it freeze, as the water in either of the Rubber Barrels (22) will freeze and become unbalanced, overloading the motor. Avoid extreme temperatures. 7. It is possible for one of the Rubber Barrels (22) to break open and spill. Make sure the location is safe for that possibility. Caution: Always check on the tumbler on a regular basis to make sure the unit is running properly and is not overheating. Make sure that SKU 90979 For technical questions, please call 1-800-444-3353. Page 4 Figure A Figure A II. Before Use 1. Before the first use, and once a month following, put a few drops of oil on the Shaft Sleeve (14) bearings. 2. Check the Belt (37) tension. It must be kept as loose as possible without allowing it to slip on the Driving Pulley (35). Check before each use. 3. Make sure the exteriors of the Rubber Barrels (22) are clean so that they don’t slip on the rollers. Wipe them with a soapy cloth, then wipe them clean with a damp cloth, and dry them thoroughly. Do not use liquid cleaners or solvents. 4. Make sure that the Stops (6) are lightly touching both Barrel Lids (28). This will prevent the Barrel Lids from rubbing against the housing and will reduce friction. Check the stops periodically during operation. III. General Use Note: These steps listed are for one barrel. Both barrels should be used together. If only one is to be “charged” (see step 2), use the other barrel on the machine as well to help keep the first in place. The barrels should be mounted with the Knurled Nuts (24) facing outward 1. To open one of the Rubber Barrels (22), remove the Knurled Nut (24) and the Washer (26). Next, remove the Barrel Lid (28)-see Figure A, right. Note: It is imperative to load the Tumbler with the proper amount of materials, or the process will not be successful, and the motor could be damaged. An underloaded barrel will not lift rocks up the inner side walls allowing the cascading effect. Also, the abrasive material in an underloaded unit will tend to form a slurry and will not be effective. An overloaded Tumbler will not allow the rocks to cascade. Lastly, too much water will cause the abrasives to float and not do their job. 2. “Charging” a barrel means loading it. Charge your barrel from 1/2 to 3/4 full. More pointed or abrasive rocks or stones will require closer to 3/4 full, leaving a 1/2 full barrel when it comes time to polish. Note: During tumbling, the stones will be reduced approximately 20% in size. 3. Choose stones that have a similar surface condition. They should have a mix of sizes ranging from small (3/16” to 3/8”) to large (3/4” to 1”). 25% of the stones should be in the smaller range. Split the remaining volume between medium sized (3/8” to 5/8”) and large sized (5/8” to 1”) stones. 4. For best results use a four step polish process. First, use a silicon carbide grain, 60-90 grit size. Second, use a fine silicon carbide grain, 220 grit or a little finer. Next, use a 600 grit silicon carbide grain or a pre-polish. Lastly, use a polish of Tin Oxide, Cerium SKU 90979 For technical questions, please call 1-800-444-3353. Page 5 Oxide, or Titanium Dioxide. When tumbling hard materials, it might be necessary to repeat the steps. Note: More specific instructions for each step are covered under “Specific Instructions”, below. Oxide, or Titanium Dioxide. When tumbling hard materials, it might be necessary to repeat the steps. Note: More specific instructions for each step are covered under “Specific Instructions”, below. Coarse Grind Medium Pre-polish Polish Burnish (soap) 4 Tbsp. 4 Tbsp. 6 Tbsp. 6 Tbsp. 1 Tbsp. Note: An Abrasive Kit (not included) is available through Harbor Freight Tools, Item # 30956. This kit includes 4 oz. of coarse grit abrasive, 4 oz. of fine grit abrasive, 2 oz. of pre-polish abrasive, and 2 oz. of polish abrasive. 5. Add enough water to reach the bottom of the top layer of rocks. 6. Seal the Rubber Barrel (22), and replace the Barrel Lid (28), Knurled Nut (24) and the Washer (26). 7. Set the Rubber Barrels (22) on the rollers, set the stops, and turn on the Power Switch (13). Make sure you check during the first ten minutes to make sure both of the tumblers aren’t leaking. Note: Although this manual primarily deals with rock/gemstone tumbling, you can use this Tumbler to work with metal and metal jewelry (without gemstones). This Tumbler may...