Stimmen - 2, Durchschnittliche Bewertung: 3.5
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Anleitung Zusammenfassung
This screw is left-hand threaded and is accessible after the chuck jaws are fully opened. Next remove the chuck by placing the shorter arm of a 3/8 “ hex key in the chuck and tighten the chuck onto the hex key. Use a 17mm open end wrench (not provided), on the spindle flats, to prevent the spindle from turning. Lay the tool on a flat surface and while holding the tool securely, strike the hex key sharply with a hard rubber mallet in the same direction as forward drill rotation. Unthread the chuck from the spindle (Fig. 3). Always keep the spindle threads, the threads of the chuck and securing screw free of debris. To install a chuck, reverse “removing the chuck” procedure. SECURING SCREW CHUCKFIG. 3 Operating Tips You will extend the life of your bits and do allows you to slowly increase RPM. By using a neater work if you always put the bit in contact slow starting speed, you are able to keep the with the work before pulling the trigger. During bit from “wandering”. You can increase the the operation, hold the tool firmly and exert speed as the bit “bites” into the work by light, steady pressure. Too much pressure at squeezing the trigger. low speed will stall the tool. Too little pressure will keep the bit from cutting and cause excess DRIVING WITH VARIABLE SPEED friction by sliding over the surface. This can be Variable speed drills will double as a power damaging to both tool and bit. screwdriver by using a screwdriver bit in the drill mode. The technique is to start slowly, DRILLING WITH VARIABLE SPEED increasing the speed as the screw runs down. The trigger controlled variable speed feature Set the screw snugly by slowing to a stop. Prior will eliminate the need for center punches in to driving screws, pilot and clearance holes hard materials. The variable speed trigger should be drilled. FASTENING WITH SCREWS The adjustable screw drill accessory will do The procedure shown in (Fig. 4) will enable all of these operations quickly and easily. you to fasten materials together with your Screw drills are available for screw sizes No. hammer drill in the drill mode without 6, 8, 10 and 12. stripping, splitting or separating the material. First, clamp the pieces together and drill the first hole 2/3 the diameter of the screw. If the material is soft, drill only 2/3 the proper length. If it is hard, drill the entire length. Second, unclamp the pieces and drill the second hole the same diameter as the screw shank in the first or top piece of wood. Third, if flat head screw is used, countersink the hole to make the screw flush with the surface. Then, simply apply even pressure when driving the screw. The screw shank clearance hole in the first piece allows the screw head to pull the pieces tightly together. 2. Drill same diameter as screw shank 3. Countersink same diameter as screw head 1. Drill 2/3 diameterand 2/3 of screwlength for softmaterials, full length for hardmaterials Screw Apply a slight even pressure when driving screws Adjustable Screw Drill FASTENING WITH SCREWS FIG. 4 -8 DRILL BITS SANDING AND POLISHING Always inspect drill bits for excessive wear. Use only bits that are sharp and in good condition. TWIST BITS: Available with straight and reduced shanks for wood and light duty metal drilling. High speed bits cut faster and last longer on hard materials. CARBIDE TIPPED BITS: Used for drilling stone, concrete, plaster, cement and other unusually hard nonmetals. Use continuous heavy feed pressure when employing carbide tip bits. DRILLING WOOD Be certain workpiece is clamped or anchored firmly. Always apply pressure in a straight line with the drill bit. Maintain enough pressure to keep the drill “biting”. When drilling holes in wood, twist bits can be used. Twist bits may overheat unless pulled out frequently to clear chips from flutes. Use a “back-up” block of wood for work that is likely to splinter, such as thin materials. You will drill a cleaner hole if you ease up on the pressure just before the bit breaks through the wood. Then complete the hole from the back side. DRILLING METAL There are two rules for drilling hard materials. First, the harder the material, the greater the pressure you need to apply to the tool. Second, the harder the material, the slower the speed. Here are a couple of tips for drilling in metal. Lubricate the tip of the bit occasionally with cutting oil except when drilling soft metals such as aluminum, copper or cast iron. If the hole to be drilled is fairly large, drill a smaller hole first, then enlarge to the required size, it’s often faster in the long run. Maintain enough pressure to assure that the bit does not just spin in the hole. This will dull the bit and greatly shorten its life. DRILLING MASONRY Soft materials such as brick are relatively easy to drill. Concrete however, will require much more pressure to keep the bit from spinning. Be sure to use carbide tip bits for all masonry work. ! WARNING Before using an accessory, be certain that its maximum safe oper...