Nama Kelompok : 1. 2. 3. 4. Andre Bayu Mahardika Alif Nur Faizin Alfian Dwi A Choirur Roziqin ”HOW TO USE A HAND DRILL” What You Will Need •Hand drill are be used for drilling concrete, steel and other construction materials, depending on the bit used. •Wood plank Wooden boards for bearings so as not to be in direct contact with the ground •Electric socket a device intended to hold an electric light bulb mechanically and connect it electrically to circuit wires. •Hammer to hammer a center punch to the object •Awl or center punch A center punch is used to mark the center of a point. It is usually used to mark the center of a hole when drilling holes. •Drill bits In order to create holes drill bits are usually attached to a drill, which powers them to cut through the workpiece, typically by rotation.Drill bits Step One - Place Bit in Chuck Using a chuck key, open up the chuck of the hand drill. This is the part of the drill that holds the drill bit. Slide the drill bit into chuck and tighten it. Make sure the bit you are using is appropriate for the material. If you are going to be drilling into metal, then you will want a metal bit. Also, keep in mind, that the larger the hole you are drilling the more force you are going to have to use. To keep things safe, it would be better to drill several smaller holes to build your way up to the one larger hole. Step Two - Mark Starting Hole When you use a hand drill you are going to need a starting hole to help you get the drill bit started. Without the starting hold your drill will have a tendency to "walk" across the material. If you are using rare wood, or doing a finishing touch to something fragile, it will scratch it. Use a hammer and tap the head of an awl in the center of where you want the hole drilled. If you are drilling into metal, then use a center punch to create an indent. Step Three - Clamp Work Piece Set the piece you are going to drill on a level, stable work area. If you are drilling into a plank of wood, then clamp it to a work bench. Use a piece of scrap wood to drill into if you are going to be going through the wood. This will keep your work bench from being damaged. Step Four - Drill into Material The actual drilling takes some practice. Before you drill into the material, make sure the hand drill is perfectly perpendicular to the work surface. Firmly grasp the top handle by pressing your palm into the center of the handle. Apply pressure to the drill and begin cranking the handle slowly. As the drill works its way into the work piece you can add a little more speed. However, it is important to keep in mind that you do not have to drill as fast as you can. An even cadence will be much better than trying to go too fast. Step Five - Clean out Wood Chips As you drill, there will be sawdust and wood chips accumulating near the hole. Periodically pull the drill bit out of the work piece and blow away the pieces before continuing.