center punch

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center punch

A tool with a sharp point used in metalworking to create an indentation that marks the center of a hole to be drilled and steadies the drill bit when drilling.

American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

cen′ter punch`

a punch for making shallow indentations in metal, esp. to mark points for drilling.

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Noun	1.	center punch - a tool with a conical point that is used to make indentations in metal (especially to mark points for drilling) punch, puncher - a tool for making holes or indentations
Verb	1.	center punch - make a small hole in something as a guide for a drill pierce, thrust - penetrate or cut through with a sharp instrument

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Remove the channels and before drilling, center punch the hole to keep the drill bit centered.

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Along with the punches, we need a center punch. This is used if we have to peen anything to keep it from coming loose.

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I removed the breechblock and used a center punch to mark the spot so the drill wouldn't wander when drilling the firing pin hole.

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To prevent this, measure and mark where you want the hole and then use a center punch and hammer to create a small dimple.

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The bit must be aligned with the center punch location.

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Additionally, pencil-lead breaks (PLB) of 0.3 mm and hardness 2H were used directly and via a center punch (Fig.

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Each marked square was nicked with a cold chisel and the center of each square was marked with a center punch. The bar was heated and the holes were punched through in succession.

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If the lock depressors need to be retightened, use a center punch on the center of the depressor's rivets.

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The six bolts shown in the bottom photograph were made from standard hex-headed, square-headed or carriage bolts using just a chisel and center punch. One just had the six sides chamfered down.