Drill Machine

Drill Machine: Construction, Classification and Applications is a comprehensive technical book on drilling technology for students, educators, and professionals in mechanical engineering and manufacturing. It explains the fundamental principles of drilling, construction and major components of drilling machines, machine classification, twist-drill geometry and materials, drilling operations, work-holding devices, cutting parameters, machining-time calculations, torque and thrust, hole accuracy, machine selection, applications, advantages, limitations, and safety precautions. The book covers drilling machines ranging from portable, bench and sensitive drills to pillar, column, radial, gang, multi-spindle, turret, CNC, micro and deep-hole drilling machines. It also discusses important drilling concepts such as cutting speed, spindle speed, feed, material-removal rate, drilling time, chip formation, cutting fluids, and common causes of poor drilling results. Designed as a practical learning resource, the book brings together core concepts, terminology, mechanisms, process parameters, calculations, and applications in an organized manner for mechanical-engineering and manufacturing-science studies.