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Important types of Drilling machine • Portable drilling machine • Sensitive or Bench drilling machine • Radial drilling machine • Turret drilling machine • Gang drilling machine.

Drill bit / Drilling tool / Twist drill: types Parallel shank type Flute run-out Morse taper shank type Tongue Reces Flute H eel Land.

Portable drilling machine 321 I dnltiug 2 drill chuck, 3 dnllit% 4 cotwol.

Various hole making operations 0611 feeds and rotates Woa statonary Drilling operation L//A/T//J Tool feeds Work rotates Boring operation Reame tota&s Work stationary Reaming Counter tx»ring operation (a) (b) Counter sinking operation.

Nomenclature of Drilling tool Overall 300 F Lete len eux ang Oometet Body clearance d". and hrse Web or core hean•ss Outer eernet Chts•l edge erne-r Heh Lea: helix Flute Heel Cu Poit Dept or body LiP eennee Poht ang• Outer Relatrv• heght x sec X -X Front clearance.

Turret drilling machine Ram Turret Base Column Worktable.

DRILLING MACHINE • Various hole making operations • Drilling tool & Nomenclature • Basic operating principle of a drilling machine • Important types of drilling machine.

Sensitive or Bench drilling machine o Spindle Chuck Table puitevs Motor Drill feed handle Column o Table clamp Base.

Principle components of a Drillin Pulley Guard Belt Hond feed Depth adjustment machine Spindle clamp Spindle Chuck Regular work table Base table M otor Table x/¯clamp Column.

Radial drilling machine Motor for elevating screw Radial arm o Motor for spindle Drill head Feed hand- wheel Column Elevating screw 0 Spindle Drill Table Base.

Radial drilling machine Radial Arm Base Clamp.

Portable drilling machine cncccp 20 Bav.

Sensitive or Bench drilling machine.

Turret drilling machine.

Gang drilling machine Columns Drill heads Worktable Base.

Multi-spindle drilling machine.

machine Gang.