masters always have a home in and hand tools: a drill or a hammer.But the drill quickly erased, blunt.As a result, they have to be thrown away and look at new stores.But the real owner poberezhet your time and try to figure how to properly sharpen a drill for metal, and what it will require adaptations.
What are drill
They vary in diameter and metal.Their characteristics depend on the intended use for the treatment of particular types of material: wood, stone, metal.The latter type is most easily amenable to grinding in the home.Let us dwell on it.Each drill has two flanks of the tool tip imparting a conical shape and two cutting edges.If it is put on a horizontally disposed washer, the cutting edges will touch it, and located them part - keep up with them.It is located at a certain angle, which is called the "rear."Escape should be estimated for each inversion 0.2 mm.All that you need to know if you're going to sharpen drill for metal with his own hands, for example, to organize the workplace in the garage.After the processing of the tools you need to give the correct form.
How to organize a workplace
you need grindstone.But you can do without it.For example, adjust power: grinding machine with a rotating disc or electric.The main thing is to set it on a workbench and well consolidated.When sharpening changes the quality of the metal (it loses ductility), and the bit heated.To avoid this, you need to install the jar next to the water.It will have to periodically immerse the processing tool.Can be used instead of water, the engine oil.Before you sharpen drill bits for metal, one must take care to avoid injury.The eyes should be protected with special glasses, they will protect against ingress of chips and crumbs.
Sharpening
Since processing tool, it must be remembered that it should be under the same angle.Drill presses to the grindstone should be tight.The process of sharpening on elektronazhdake consists of several stages.Initially, the tip of the drill is formed, then - cutting edge, and finally back surface grinding is performed.Ideally, after processing the back portion should have a cone shape, and cutting edge - to find the ideal angle.
When the bulk of the work done, comes the turn polishing.About how to properly sharpen a drill for metal, will be able to tell the master professional.You can call in teachers.If you want to learn it on their own business, then start experimenting with broken, blunt instruments.The processing of web forms.In drills with a diameter of up to seven millimeters in length shall be between 0.5 and 0.7 millimeters.In larger, it can be from one to one and a half millimeters.If a larger drill bit, then it is necessary to remove the edge on the shank.They face a lot of resistance to cutting.To do this accurately mark the circumference of the tool in three parts.Now, it is necessary to very carefully remove the metal to an equal depth.
Processing jumper
Another important point: it is necessary to know how to sharpen a drill for metal and process jumper.In most cases, at home on the grinding machine difficult to achieve the desired result.The ribbon is needed in order to reduce the load on the drill, to increase the speed and accuracy of the drilling.The overall process is as follows.Podtochku jumper and back are made on the edge of the circle, at a slow speed.Drill sharpener should apply for a short time.Then it must move aside, turn to one hundred and eighty degrees, re-press the circle.Periodically, when the metal is heating up, the processing tools necessary to dip into the water, so he did not lose elasticity.If you use an abrasive wet bar, the risk of spoiling the drill is considerably reduced.Check
sharpening
After the process is necessary to check the quality of the work done, the symmetry of sharpening.In order to see how correct sharpening drill bits for metal has been carried out, it can be armed with a magnifying glass, or use a drill.It is necessary to insert the tool and processed pen to bring the cutting edge.Then turn off the drill and check to see where the trail was on the drill.If one side is smeared over another, and it is necessary to erode.The second method - a hand drill to drill plastic.On the side where the chip will go longer, the line at the drill more.It is and should be modified.Once properly sharpened drill for metal you succeed, you get a tool to restore the working qualities.To keep them for a longer period is required box.To avoid damaging them, blows against each other or to other items they need to be wrapped in oiled cloth or fasten a rubber band.
