What is "edge mill"

Edge \Edge\ ([e^]j), n. [OE. eg, egge, AS. ecg; akin to OHG. ekka, G. ecke, Icel. & Sw. egg, Dan. eg, and to L. acies, Gr. 'akh` point, Skr. a[,c]ri edge. [root]

1. Cf. Egg, v. t., Eager, Ear spike of corn, Acute.] 1. The thin cutting side of the blade of an instrument; as, the edge of an ax, knife, sword, or scythe. Hence, (figuratively), that which cuts as an edge does, or wounds deeply, etc.

   He which hath the sharp sword with two edges.
   --Rev. ii. 1

2. Slander, Whose edge is sharper than the sword.
   --Shak.

   2. Any sharp terminating border; a margin; a brink; extreme verge; as, the edge of a table, a precipice.

   Upon the edge of yonder coppice.
   --Shak.

   In worst extremes, and on the perilous edge Of battle.
   --Milton.

   Pursue even to the very edge of destruction.
   --Sir W. Scott.

3. Sharpness; readiness or fitness to cut; keenness; intenseness of desire.

   The full edge of our indignation.
   --Sir W. Scott.

   Death and persecution lose all the ill that they can have, if we do not set an edge upon them by our fears and by our vices.
   --Jer. Taylor.

4. The border or part adjacent to the line of division; the beginning or early part; as, in the edge of evening. ``On the edge of winter.'' --Milton. Edge joint (Carp.), a joint formed by two edges making a corner. Edge mill, a crushing or grinding mill in which stones roll around on their edges, on a level circular bed; -- used for ore, and as an oil mill. Called also Chilian mill. Edge molding (Arch.), a molding whose section is made up of two curves meeting in an angle. Edge plane.

   1. (Carp.) A plane for edging boards.

   2. (Shoemaking) A plane for edging soles. Edge play, a kind of swordplay in which backswords or cutlasses are used, and the edge, rather than the point, is employed. Edge rail. (Railroad)

      1. A rail set on edge; -- applied to a rail of more depth than width.

      2. A guard rail by the side of the main rail at a switch. --Knight. Edge railway, a railway having the rails set on edge. Edge stone, a curbstone. Edge tool.

         1. Any tool or instrument having a sharp edge intended for cutting.

         2. A tool for forming or dressing an edge; an edging tool. To be on edge,

            1. to be eager, impatient, or anxious.

            2. to be irritable or nervous. on edge,

               1. See to be on edge.

               2. See to set the teeth on edge. To set the teeth on edge,

                  1. to cause a disagreeable tingling sensation in the teeth, as by bringing acids into contact with them. [archaic]
                     --Bacon.

                  2. to produce a disagreeable or unpleasant sensation; to annoy or repel; -- often used of sounds; as, the screeching of of the subway train wheels sets my teeth on edge.

Mill \Mill\, n. [OE. mille, melle, mulle, milne, AS. myln, mylen; akin to D. molen, G. m["u]hle, OHG. mul[=i], mul[=i]n, Icel. mylna; all prob. from L. molina, fr. mola millstone; prop., that which grinds, akin to molere to grind, Goth. malan, G. mahlen, and to E. meal. [root]108. See Meal flour, and cf. Moline.]

1. A machine for grinding or comminuting any substance, as grain, by rubbing and crushing it between two hard, rough, or indented surfaces; as, a gristmill, a coffee mill; a bone mill.

2. A machine used for expelling the juice, sap, etc., from vegetable tissues by pressure, or by pressure in combination with a grinding, or cutting process; as, a cider mill; a cane mill.

3. A machine for grinding and polishing; as, a lapidary mill.

4. A common name for various machines which produce a manufactured product, or change the form of a raw material by the continuous repetition of some simple action; as, a sawmill; a stamping mill, etc.

5. A building or collection of buildings with machinery by which the processes of manufacturing are carried on; as, a cotton mill; a powder mill; a rolling mill.

6. (Die Sinking) A hardened steel roller having a design in relief, used for imprinting a reversed copy of the design in a softer metal, as copper.

7. (Mining)

   1. An excavation in rock, transverse to the workings, from which material for filling is obtained.

   2. A passage underground through which ore is shot.

8. A milling cutter. See Illust. under Milling.

9. A pugilistic encounter. [Cant]
   --R. D. Blackmore.

10. Short for Treadmill.

11. The raised or ridged edge or surface made in milling anything, as a coin or screw.

12. A building or complex of buildings containing a mill[1] or other machinery to grind grains into flour.

    Edge mill, Flint mill, etc. See under Edge, Flint, etc.

    Mill bar (Iron Works), a rough bar rolled or drawn directly from a bloom or puddle bar for conversion into merchant iron in the mill.

    Mill cinder, slag from a puddling furnace.

    Mill head, the head of water employed to turn the wheel of a mill.

    Mill pick, a pick for dressing millstones.

    Mill pond, a pond that supplies the water for a mill.

    Mill race, the canal in which water is conveyed to a mill wheel, or the current of water which drives the wheel.

    Mill tail, the water which flows from a mill wheel after turning it, or the channel in which the water flows.

    Mill tooth, a grinder or molar tooth.

    Mill wheel, the water wheel that drives the machinery of a mill.

    Gin mill, a tavern; a bar; a saloon; especially, a cheap or seedy establishment that serves liquor by the drink.

    Roller mill, a mill in which flour or meal is made by crushing grain between rollers.

    Stamp mill (Mining), a mill in which ore is crushed by stamps.

    To go through the mill, to experience the suffering or discipline necessary to bring one to a certain degree of knowledge or skill, or to a certain mental state.

An edge mill is a mill used for crushing or grinding in which stones roll around on their edges on a level circular bed. They were developed in China in the third century and are still used today in remote villages around the world. When the millstones were replaced with iron or steel disks in the 19th century, they were known as a Chilean mill.

It is used for milling ore and as an oil mill. Horse or oxen-driven versions were used in pre- industrial revolution America as tan bark mills to shred tree bark to derive tannins for the leather industry.

1. Principle: Works on the principle of compression and shear offered to feed by heavy steel pestle.

2. Working: The feed is placed in the motor and the motor is rotated. The pestle also rotated due to friction produced between the motor and pestle. Scrapers bring the feed to the grinding zone, and the material is reduced in size and then collected and sieved.

3. Application: Brittle and crystalline substances are reduced to powder.

4. Advantage: It is a laboratory scale mill.

5. Disadvantage: It was replaced by more advanced mills.