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The hole is drilled at the center of the stone with the ends pointing toward the back of the hole The blanks were roughly flaked or chipped to a general shape then pecked to their final shape Examples from the Hardaway site indicate that they were then drilled prior to final grinding and polishingFurther Details
May 19 2017 · Large Connecticut GameStone Ball Club An impressive relic showing a large drilled hole with no modern damage Most likely was used as a weight possibly a half piece of a large Discoidal An unusual Artifact that displays great standing up on the flat bottom side Recovered along the Thames River in Norwich Connecticut in the early 1950sFurther Details
Traditional medicine wheels like the one at Bighorn were stone structures constructed by Native Americans for various astronomical ritual healing and teaching purposes The wheels followed a basic patterna stone center surrounded by an outer ring of stones with lines of rocks or “spokes” radiating from the centerFurther Details
Stone axe head 34 grooved graphite and green color PreEuropean contact grooved axes are thought to be early Native American collection history to Illinois 25000 1118 4 12 x 3 Stone axe head 34 grooved PreEuropean contact but grooved axes are thought to be earlier Native American greater Southeast US 29500 10AXFurther Details
The stone would be trimmed down onehalf of its thickness around the outside circumference and then the eye of the stone i e the center hole eight to ten inches in diameter if a runner or an eight to ten inch square hole if a bed stone would be cut onehalf way through this operation required special tools and very exact measurements and was done by the foreman or head cutterFurther Details
Gorgets with holes drilled for suspension The drilling process results in a biconical hole that is narrowest near the middle of the object Largerdiameter holes could be drilled using a hollow bone or reed along with sand and water A byproduct of the hollow drill was a narrow cylindrical core of the parent rock Such cores of drilled ground stone artifacts have been found onFurther Details
Jan 28 2016 · There are two ways to make a stone ball You can look for a stone that’s nearly round and work on removing the irregularities Or the easiest way is to start with a stone that’s cubic and bash off the 8 corners You then have 32 corners which you bash off and so on This was usually done with a hammer and cold chiselFurther Details
Rotation Speed:0.1–5 r/min
Applied Materials:Limestone, granite, basalt, andesite, iron ore, quartz, diabase, iron ore, gold ore, copper ore,etc.
Feeding Size: 65-300mm
Discharging Size: 3-60mm
Production Capacity: 12-1000TPH
Production Capacity: 1.9-76TPH
Application Range: Industries of mining, ore beneficiation, construction materials and chemical engineering.
Technical Features:Cooling the clinker (1000-1300℃) discharged from rotary kiln to below 200℃ and improving the quality and grinding ability of the clinker.
Configuration:Jaw crusher, grinding mill, bucket elevator, magnetic vibrating feeder, transmission gear, main engine.
Applied Materials:Feldspar, calcite, talc, barite, fluorite, rare earth, marble, ceramics, bauxite, manganese, phosphate rock, etc.
Application Area:Building materials, chemicals, fertilizer, metallurgy, mining, refractory, ceramic, steel, thermal power, coal, etc.
Capacity:0.18-7 (m ³/min)
Suitable Materials:Lithium, copper, zinc, lead, nickel, gold and other non-ferrous metals, ferrous and non-metal.
Major Equipment:Jaw crusher, ball mill, sprial classifier, flotation machine, concentrator machine and dryer machine
Production Capacity: 50-300TPH
Applied Materials:River gravel, limestone, granite, basalt, andesite, iron ore, quartz, diabase, iron ore, gold ore, copper ore,etc.
Feeding Granularity: 300-700mm
Production Capacity: 30-550TPH
Application area:Slag industry, sandstone industry, etc.
Applied Materials:Slag, blast furnace slag, fly ash, cinder, slag, carbide slag, limestone, clay, sand, quartz sand, etc.
Application Area: industries of wood, slag, sand, construction materials, metallurgy, chemical engineering, coal, minerals, etc.
Applied Materials: sawdust, wood chips, wood shavings, clay, limestone, ardealite, dry-mixed mortar, grain slag, coal slime, etc.
Technological Features: Crushing raw materials, pre-homogenizing materials, arranging ingredients, efficient grinding, homogenizing materials, suspending pre-heater and decomposing furnace, new type cooler, cement dosing and grinding.
Application Range:Coal plant
Warranty: 1 year
Brand Name: Fote
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