Drilling holes on the cylindrical surface. Techniques of mating through through and deaf holes

Drilling, zenketing, deployment Drilling is one of the frequently performed operations during assembly and locksmithing work. To do this, use manual, pneumatic and electric drills, rattles, drilling heads with a drive from a flexible shaft, as well as drilling machines, if the conditions allow for their use. The main manual non.elevated tools for drilling are a columnar, a spiral drill, […]

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