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Blade grinder
A blade grinder (also propeller grinder) is a machine that chops material while mixing it, by means of a high-speed spinning blade. Applications of blade grinders for preparing foods include numerous electric kitchen appliances such as blenders (including immersion blenders), food processors, some garbage disposals, and some coffee grinders. The terms "blade grinder" and "propeller grinder" are in popular use to distinguish the blade grinder type of coffee grinder from other types. Other consumer applications include rotary lawn mowers.
==Design==
A blade grinder may be considered a type of hammermill. A blade grinder resembles a meat grinder in that both have propeller-shaped cutting blades. However, meat grinders (and food mills) use a scissor cutting action as the blades rotate against a perforated metal plate. Meat grinder blades rotate at a much slower speed than blade grinders, which may rotate at speeds as high as 20,000 to 30,000 rpm; an example is the Preethi Steele mixer-grinder, whose no-load speed is 23500 rpm and loaded speed is 11500rpm.〔(【引用サイトリンク】title=Technical Specification of Preethi Steele )〕
Blade grinders also resemble industrial blade (propeller) mixers, which like meat grinders rotate at much slower speeds. Unlike blade grinders, these mixers do not alter (break, cut, shred, macerate, pulverize) the material being mixed. The high speed of rotation of blade grinders is necessary to achieve their cutting action. In a blender application, the high speed of rotation contributes to shearing, which in turn contributes to aeration and the formation of emulsions. These are desirable qualities in many food preparations.A blade grinder runs using battery and also by using electricity.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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