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Drilling

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Rural Technology

Drilling is the cutting process to cut or enlarge holes in solid materials, such as wood or metal using drill bit and drill machine. Different tools and methods are used for drilling depending on the type of material, the size of the hole, the number of holes, and the time to complete the operation. Ref fig. 5.3(a)

Some hard material requires cooling while drilling. Speed and feed of drill also depends on the material to be drilled. Ensure right direction of rotation of drill.

Taps and dies are cutting tools used to create screw threads in material. A tap is used to cut the female portion of the mating pair (e.g. a nut). The process of cutting the threads in a hole is called “tapping” the hole. A photo of tap is shown in the figure, 5.3 (b)

A die is used to cut the male portion of the mating pair (e.g. a bolt). The process of cutting with a die is called “threading”. Different die are shown in fig 5.3 (c)

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Rural Technology