Using the Portable Electric Drill

Types and Uses - Continued - 14256_306

Using the Portable Electric Hammer

Tools And Their Uses - Hand tools and what they are used for
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TM 9-243 USING THE PORTABLE ELECTRIC DRILL WARNING BEFORE USING ANY ELECTRICAL TOOL, ALWAYS MAKE CERTAIN THE TOOL IS EQUIPPED WITH PROPER GROUNDING FEATURES. FAILURE TO HAVE PROPER GROUNDING CAN RESULT IN SERIOUS SHOCK. WARNING ALWAYS WEAR PROPER EYE PRO- TECTION WHEN WORKING WHERE FLYING PARTICLES MAY CAUSE EYE INJURY. 1 Select the proper bit (1) required for the task. NOTE To turn chuck key in either direction a firm grasp of the chuck is required. 2 Fit the chuck key (2) into the side adjusting hole between jaws (3) and chuck (4) and turn the key counterclockwise until the chuck opens enough to admit the bit shank (5). 3 Insert the bit and center the shank in the chuck jaws. Tighten jaws securely by turning the chuck key clockwise. 4 Remove chuck key and store where key will not get lost. 5 Before drilling, make sure that the work is station- ary or firmly secured. 6 Using a punch or awl, make a small prick point (6) in the spot where the hole will be made. (This will prevent the drill bit from bouncing or slipping away from the spot where the hole is to be drilled.) 7 Connect electric drill (7) to power source. Place the drill bit on the marked spot and depress trigger switch. Begin drilling, exerting firm but even pres- sure to keep the bit cutting. 8 Withdraw the bit frequently from the work to clean chips from the bit flutes (8) and to allow the bit to cool. 9 Ease upon the drill pressure as the bit approaches the other side of the work surface. 10 After hole is completed, carefully withdraw rotating drill bit to prevent binding or breaking. Release trigger switch. 52-5

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