Drills must be of high quality and well sharpened in the work of a professional craftsman. In the old days, drill sharpening was done manually.
To date, special devices for sharpening drills have appeared, and their design is very simple.
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What is sharpening for?
If the drill is dull, then it is very difficult, and sometimes impossible to drill the surface. It is also worth noting that for different types of surfaces, drills should have a certain sharpening angle, for example, for a plastic surface, the angle will be 30 degrees, for hardened steel this angle will be 130 degrees.
In cases where a perfectly drilled hole is not required, the sharpening angle can be 90 degrees.
How to make the right sharpening drill
Sharpening the drill can be done with your own hands using abrasive discs. During sharpening, the drill must be held by the work surface. Hold the tail of the drill with your other hand.
From the side, the drill must be pressed against the abrasive disk. Then it is advisable to turn it with utmost care, as a result, the cutting edge will take the desired angle and structure.
Sharpening the drill must be done on each side separately. It is also necessary to ensure that the tip of the drill is located exactly in the center at the time of sharpening the cutting part. This should be done correctly, since an error in sharpening can lead to the fact that the drill will mow sideways.
Do-it-yourself sharpening the drill is not the best way, since it can carry a number of inaccuracies, for example, cutting edges may not be correct with respect to the axis of the tool.
Sharpening device
The device is designed for sharpening deaf or through drills that are made of cast iron and steel. Such a device is made taking into account the types of sharpening, as well as its size. It is easy to change the grinding angle on the machine.
There are two types of devices that can help sharpen a drill: a household and industrial machine. In the first case, the sharpening device takes up little space and fits perfectly for work in the house, but such a machine can only sharpen small drills.
Industrial machines have great power, which are made in order to sharpen drills with a large diameter. The industrial machine has a clamp and a grinding wheel.
With this device, the sharpening of the drill occurs under the supervision of an operator who easily controls the process. Such devices are designed for long-term operation.
How to make a machine for sharpening drills with your own hands
We will need the following materials: an abrasive disk, a switch, a motor with good power, a stand, wires, an axis and a plug. Also, for the safe use of the machine, it must have a body on the outside of which an axis with an abrasive wheel must be placed for operation.
First you need to decide on the installation location of the machine, since it will connect to the outlet.
Also, our device should be placed on a table, preferably of metal, where it will be necessary to put the engine, and place marks for making holes for the bolts.
An abrasive disc is put on the motor shaft. To fix it on the shaft, you must first put on the washer, then the disk and again the washer. After that, install the fastening nut on the pre-prepared thread on the shaft.
As the motor for our device, the engine from the washing machine is perfect. The power of its motor will be sufficient for the process of sharpening drills.Wires can also be taken from improvised equipment.
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Connect the wires to the starter, which should be with three open contacts. The winding must be capable of connecting phase lines, using two starters connected in series.
The shutdown button must be connected to the NC, and the start button will be connected to the NO, it should also be in parallel with two NO contacts of the starter.
When the power button is pressed, voltage will be applied to the winding as a result of which the loops should close. When the button is released, the voltage supplied to the starter must not be removed. When turned off, the engine should stop.
The engine itself is a safe device, but to protect its mechanisms from dust, it is necessary to make a frame that will protect it from environmental influences.
For its manufacture, you can use a metal box or make a protective screen of glass. It is also worth installing a casing covering the end of the disk by a third. It will protect the worker if the abrasive disc crack.
DIY sharpening photo of drills
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