The purpose of this tool - drilling holes in wood and metal. Electric drill consists of an electric motor, a connecting spindle chuck to the drill through a serial circuit anchorages. See, how to choose a drill for the home right. In most cases, the drilling spiral drills are used. Deep into the material the drill should penetrate gradually, without jerks and jolts. If required, perform a through-hole pressure must be reduced as it moves drills.
The lower part of drills with a longitudinal groove located ostrorezhuschim edge and pulling of a drill, Centering giving it direction, screw tip. In the process, the chips are not removed, therefore it has to be periodically removed from the drill hole. This drill hole to perform accurate is rather difficult. When drilling, do not push to drill very, because the tree may split. For this reason, drills are only suitable for not requiring great precision work, such as drilling holes for screws.
How to work with electric drill
center drill, compared with lozhechnym, It has the best characteristics. Its cutting portion is a blade, having a pointed end (Centre), lateral incisor (Dorozhnik) and located radially flat knife. The drill is centered tip. It operates as follows:: trimmed lateral cutter timber is removed in the form of a spiral flat ribbon knife. If necessary, drill hardwood required considerable physical effort.
The most convenient are spiral, screw, cylindrical drill. screw zaglubitel, having a conical shape, It promotes easy entry of the drill into the tree. sharp incisors (road builders), cutting circumferentially timber, are end side helical ribbons. Undercut timber is removed using a flat knife and spirally ascends. The diameter of the drilled hole is determined dorozhniki. Finishing best suited with a shallow notch drill sting.
Drills with a large incision needed for working with soft wood. Working twist drill is much easier, than all other. In some cases, when drilling a tree breaks off at the point of the drill exit, and the hole itself obtained chamfered. To avoid such troubles, you need to follow the following rules:
- workpiece, which is to be drilled, must be firmly.
- the future center of the hole you need to outline a pencil or awl.
- The accuracy of direction drills need to check twice: before the start of drilling and then, when the drill enters shallowly.
- When drilling a deep hole drill direction can be checked on the eye, focusing on the line, pre-drawn by pencil.
To drill a blind bore, use a limiter, a role which stands a wooden block. It is placed on the side of the drill and the drill, while the limiter comes into contact with the chuck. Before you get started, drill a larger diameter drilled bar, receiving device for monitoring the drilling angle. Allowed to perform the plurality of apertures at different angles, which will be the benchmark later. Next to each of them make the necessary mark to produce a universal template.
Often tree spalling observed at the site of the drill exit. To prevent this, It should closely monitor the output of the sting out. Immediately as soon as it seems, We need to turn the piece and finish drilling. At all, drilling possible in one direction, but in this case a small block of wood should be placed under the bottom of the workpiece.
Sometimes there is a need to expand the already drilled hole. To this end into the opening and a stopper was placed wooden drill screw in its middle. In this case, the plug serves as a centering unit, directing the drill bit smaller hole axis. You can use a drill and an auxiliary tool for gouging nests. To do this drill with a diameter, equal to the width of the future opening. Drilled to the desired depth a number of slots, and then the remaining jumpers removed chisel.
During storage, to avoid damage to the drill head, It is screwed on a sting or wine wooden plug of appropriate size. Do not forget - Job security first of all!