The Core Keeper drill is used for the automated mining of ore, and it's an item you'll hear about long before you get a chance to make one. While exploring the underworld you'll quickly come across some large crystalline mineral deposits that look like jagged boulders, and when you hit one with your pickaxe you'll be told you can't mine them without a drill...
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Core Keeper drill: How to craft and power your mining machinery
Source: PC Gamer (opens in a new tab)