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MACHINING OPERATIONS AND MACHINE TOOLS

MACHINING OPERATIONS AND MACHINE TOOLS

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2. Drilling & Related Operations • Geometry of Twist drill – Shank, Neck and Drill body – Helix angle, Point angle, Flute, cutting edge, Chisel edge, Margin • Cutting conditions. D v N. π Spindle: = Feed rate: r = f Nf. Metal Removal Rate: 4. 2 MRR =π. D f. r. Machining time: r m. f t A T + = For a through hole. For a blind hole. r m ...

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