What does core drill mean?

Definitions for core drill
core drill

Here are all the possible meanings and translations of the word core drill.

Princeton's WordNet

  1. core drillnoun

    a drill that removes a cylindrical core from the drill hole

Wiktionary

  1. core drillnoun

    A device used to remove a cylinder-shaped sample of material for examination

Freebase

  1. Core drill

    A core drill is a drill specifically designed to remove a cylinder of material, much like a hole saw. The material left inside the drill bit is referred to as the core. The earliest core drills were those used by the ancient Egyptians, invented in 3000 BC. Core drills are used for many applications, either where the core needs to be preserved, or where drilling can be done more rapidly since much less material needs to be removed than with a standard bit. This is the reason that diamond-tipped core drills are commonly used in construction to create holes for pipes, manholes, and other large-diameter penetrations in concrete or stone. Core drills are used frequently in mineral exploration where the coring may be several hundred to several thousand feet in length. The core samples are recovered and examined by geologists for mineral percentages and stratigraphic contact points. This gives exploration companies the information necessary to begin or abandon mining operations in a particular area. Before the start of World War Two, Branner Newsom, a California mining engineer, invented a core drill that could take out large diameter cores up to 16 feet in length for mining shafts. This type of core drill is no longer in use as modern drill technology allows standard drilling to accomplish the same at a much cheaper cost.

Matched Categories

Anagrams for core drill »

  1. drill core, drillcore

  2. Drill core

  3. Drillcore

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Numerology

  1. Chaldean Numerology

    The numerical value of core drill in Chaldean Numerology is: 3

  2. Pythagorean Numerology

    The numerical value of core drill in Pythagorean Numerology is: 6

Images & Illustrations of core drill

  1. core drillcore drillcore drillcore drillcore drill

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