Which tool is used to drill accurate holes in wood, metal and plastic?

Which tool is used to drill accurate holes in wood, metal and plastic?

• A. Twist drill bit
• B. Angle grinder
• C. Hacksaw
• D. Polishing or buffing machine

Answer: (A)

Drilling accurate holes is done with a twist drill bit. This bit has a sharp point and helical flutes that cut as it spins, pulling the material away to create a clean, round hole. With the right size and material (high-speed steel for many materials, and specific bits for metal or wood), and proper setup on a drill or drill press, it can produce precise holes in wood, metal, and plastic. To help accuracy, clamp the work, mark the hole with a center punch, and start with a small pilot hole if needed. The other tools don’t drill holes: an angle grinder cuts or grinds, a hacksaw cuts, and a polishing or buffing machine smooths surfaces.

Drilling accurate holes is done with a twist drill bit. This bit has a sharp point and helical flutes that cut as it spins, pulling the material away to create a clean, round hole. With the right size and material (high-speed steel for many materials, and specific bits for metal or wood), and proper setup on a drill or drill press, it can produce precise holes in wood, metal, and plastic. To help accuracy, clamp the work, mark the hole with a center punch, and start with a small pilot hole if needed. The other tools don’t drill holes: an angle grinder cuts or grinds, a hacksaw cuts, and a polishing or buffing machine smooths surfaces.