Drill chucks maintain the rotary tools and drill attachments in position by utilizing a key system or a keyless system. Chucked manual drills use keyed chucks which offer an accuracy of ±0.02mm, while CNC machines use types with quick-release keyless chucks with runout of ≤0.01mm for sizes under 13mm. Industrial use heavy-duty models of these tools maintain concentricity while deep hole drilling which ensures precision during intense work. These tools also have specially designed jaws made of carbide that allow for the drilling of over-sized bits (up to 25mm).
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