Make this machine and forget about stupid drills forever

To quickly and correctly sharpen drills, you can assemble a simple machine that allows you to edit them at the correct angle. A homemade mini machine takes up virtually no space in the workshop. When stored, it can be placed either in a desk drawer or on a shelf.
Make this machine and forget about stupid drills forever

Materials:


  • electric motor DC 555 -
  • engine bracket;
  • power connector;
  • adapter from the motor shaft to the cutting disc;
  • power switch;
  • diamond disc 40 mm;
  • power supply 12-24V;
  • plywood 10 mm;
  • PVC pipe 50 mm.

Make this machine and forget about stupid drills forever

Manufacturing process of drill sharpening machine


From plywood or boards 10 mm thick you need to cut 2 blanks 70x55 mm and one 60x40 mm. Using self-tapping screws, they are connected into an H-shaped machine bed.
Make this machine and forget about stupid drills forever

Then the sole is cut out of plywood. It should have an angular shape. When drawing it, it is advisable to use a protractor to form the angle at which the drills will be sharpened. For example, if you need to sharpen drills for hard metal, then you need an angle of 116-118 degrees. The sole is screwed to the base with self-tapping screws.If you do not initially set the correct angle, then later, when placing the stop for the drills, it will be installed asymmetrically. This is not critical, but it will look less neat than it could.
Make this machine and forget about stupid drills forever

Make this machine and forget about stupid drills forever

A bracket is installed on the machine bed, and the engine is screwed to it. The adapter for the cutting disc is clamped onto the motor shaft.
Make this machine and forget about stupid drills forever

Make this machine and forget about stupid drills forever

Holes are drilled on the side at the bottom of the base for installing a power connector and a toggle switch. The electrical part of the machine is soldered and glued in place.
Make this machine and forget about stupid drills forever

Make this machine and forget about stupid drills forever

Make this machine and forget about stupid drills forever

Next, a piece of PVC pipe 86 mm long is cut. It needs to be cut lengthwise as in the photo. The result is a casing to protect the engine. It is glued to the machine bed on top of the motor. It is important that the housing has a sufficient slot to allow access to the adapter on the motor shaft with a wrench, which is necessary to clamp the abrasive wheel.
Make this machine and forget about stupid drills forever

Make this machine and forget about stupid drills forever

A 40 mm diamond disc is installed on the adapter on the motor shaft.
Make this machine and forget about stupid drills forever

Then a drill stop cut from plywood is screwed to the protruding part of the sole. It is positioned so that the drill resting on it touches the tip to the disk at an angle of 116-118 degrees.
Make this machine and forget about stupid drills forever

Its upper side is also made at an angle corresponding to the sharpening angle. To prevent the drill from slipping, a holder made of a U-shaped aluminum profile is glued to the stop on top.
Make this machine and forget about stupid drills forever

Thanks to it, the sharpened edge will always be strictly parallel to the plane of the abrasive disc.
Make this machine and forget about stupid drills forever

Make this machine and forget about stupid drills forever

Make this machine and forget about stupid drills forever

Make this machine and forget about stupid drills forever

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Comments (4)
  1. Guest Alexander
    #1 Guest Alexander Guests 18 July 2020 04:57
    15
    Who taught you how to sharpen drills so incorrectly? You can round the edges as you like, but a straight section near the edge itself is required, and the cutting speed depends on its angle of inclination. For large drills, this is an important factor, otherwise the drill will bite into the material and eventually break. With a straight edge of half a millimeter or more for large drills, the chips will curl neatly if it is metal. I'm surprised at today's playful hands.
  2. Vlad
    #2 Vlad Guests 20 July 2020 12:03
    6
    If this is an ordinary drill, then sharpening is enough for exactly a couple of seconds
  3. Palkin Mikhail
    #3 Palkin Mikhail Guests 9 August 2020 10:24
    6
    To forget about dull drills, you need to learn how to sharpen them))). I used to work as a turner, now I can sharpen a drill on any abrasive material, be it emery or a grinder, at worst, a piece of fine sandpaper or sandpaper is enough.
  4. Sergey
    #4 Sergey Guests 22 October 2020 14:35
    3
    Drills don’t sharpen that way, and your small-diameter drill has a head higher than the cutting edge. Everything underneath will burn