Drill 3D Live Wallpaper HD

A drill is a tool fitted with a cutting tool attachment or driving tool attachment, usually a drill bit or driver bit, used for boring holes in various materials or fastening various materials together with the use of fasteners. The attachment is gripped by a chuck at one end of the drill and rotated while pressed against the target material. The tip, and sometimes edges, of the cutting tool does the work of cutting into the target material. This may be slicing off thin shavings (twist drills or auger bits), grinding off small particles (oil drilling), crushing and removing pieces of the workpiece (SDS masonry drill), countersinking, counterboring, or other operations.

Drills are commonly used in woodworking, metalworking, construction and do-it-yourself projects. Specially designed drills are also used in medicine, space missions and other applications. Drills are available with a wide variety of performance characteristics, such as power and capacity.

</div> <div jsname="WJz9Hc" style="display:none">的钻头是装有一个切割工具附件或驱动工具附件，通常是一个钻头或螺丝刀头，用于镗在各种材料的孔或通过使用紧固件紧固各种材料一起的工具。该附件是由一个卡盘在钻的一端夹紧的同时对目标材料加压转动。切削刀具的尖端，有时边缘，不切割到目标材料的工作。这可以割去薄屑（麻花钻或螺旋钻比特），磨过的小颗粒（石油钻井），破碎并除去工件（SDS砖石钻头），锪，或其他操作件。

演习在木材加工，金属加工，建筑常用的，做自己动手的项目。特别设计的演习也用于医药，航天任务和其他应用程序。钻头可与多种的性能特性，例如功率和容量。</div> <div class="show-more-end">