Hand Drill

Hand Drill Points : hand drill, definition In house wiring, it is often required to drill a hole in wooden blocks and wooden boards to facilitate the passage of insulated V.I.R. wires which terminate into switches or other fittings. For such purposes, a hand drill is much useful. It consists of a chuck with hardened steel jaws into which is placed the twist drill. A crank and gear is used for increasing the speed of drill. For opening the jaws, hold the chuck in left hand and turn the handle in an anti-clockwise direction with chuck pointing downward, and for tightening the twist drill, place the drill in the jaws, hold the chuck firmly and turn the handle in clockwise direction with the drill pointing down. i.e. in the direction of operation of the drill, and the drill will be firmly secured. Fig. shows the hand drill.