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What kind of steel is called drill rod?

Updated: 8/19/2019
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12y ago

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The drill shank could be of high speed steel or tungsten carbide.

add. The actual drill rod will be of tool steel, for it has to take a lot of hammering at the top. The lengths of rod are made in increasing lengths, increasing in about 6 ft increments. This is so one can drill six ft more, then go to a longer drill. That was in the old days of manual drilling. In the 50's the drill bits themselves had inserts of tungsten carbide - then a new material. Prior to that the bits were just hardened steel.

So the drill rod would be a little more than an inch in diameter, with the drill head screwed on the end. The rods have a hole through their length through which air is periodically blasted to clear debris from the hole. This 'dry drilling' is now known to have been hazardous to humans on account of the silica dust discharged.

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