Grinding head made from an armature from an engine

Grinding head made from an armature from an engine

There is a situation when the necessary tool or consumables are missing. Broken, finished - it doesn’t matter. And it’s good if a store where you can find the necessary thing is nearby. In today's master class we will talk about sanding heads with replaceable sandpaper (or cloth). In my case, the grinding heads for the drill were worn out to an extreme degree - not a single grain of sand remained! I haven’t received any new orders from the chain store yet, and I can’t find them in local stores.
Grinding head made from an armature from an engine

And the work is worth it! You'll have to tinker a little and do the necessary thing yourself. The first thing you should pay attention to in such a situation is a suitable base for the future head. In this case, these are armatures from small, three-volt motors. Surely, everyone in the household has an unnecessary engine, or a broken toy from which the engine can be removed. The anchors from the engines have the ideal balance and weight to create a temporary (or even permanent!) similar tool. Anchors, as everyone knows, come in a wide variety of sizes and thicknesses. I disassembled three different engines.Let's see what we can come up with from this!

You will need:


  • Electric motors (having anchors of the size you need).
  • Sandpaper or cloth (again, the section you need).
  • Any dry branch or stick that will fit into the gaps between the anchor blades.

Grinding head made from an armature from an engine

Required tool:
  • Scissors.
  • Pliers.
  • Boring machine with cutting disc.

Grinding head made from an armature from an engine

Manufacturing of grinding heads


First, let's remove the anchors from the engines. You can divide such an engine into components by bending the brackets on the sides at the bottom of the engine.
Grinding head made from an armature from an engine

Grinding head made from an armature from an engine

If it is not possible to bend the staples (this happens too!), then we simply cut them off with a drill or a file.
Grinding head made from an armature from an engine

Grinding head made from an armature from an engine

Dismantled. We remove the anchors from the housings.
Grinding head made from an armature from an engine

We pick out the copper winding and use a drill to cut off one of the ends of the steel rod, right to the root.
Grinding head made from an armature from an engine

Grinding head made from an armature from an engine

The result was these blanks, that is, the basics:
Grinding head made from an armature from an engine

Now we take sandpaper of the required grain size, measure the required width, and cut the tape.
Grinding head made from an armature from an engine

Grinding head made from an armature from an engine

Grinding head made from an armature from an engine

We measure with a tape a full revolution from one armature gap, with a margin of 2-3 mm. We tuck one end into the gap, wrap it around (with the grain facing out, of course!) and tuck the free end of the tape into the same gap as the beginning of the tape. Like this:
Grinding head made from an armature from an engine

Grinding head made from an armature from an engine

The grip, thanks to the sandpaper grains, will be excellent and will not fall out! If the armature has large gaps, then, instead of a solid winding of sandpaper, you can make petals that will be fixed in the gaps using wedges made of sticks.
Grinding head made from an armature from an engine

Such petals will work no worse than a solid winding.
Grinding head made from an armature from an engine

A flat anchor may not make a good head.
Grinding head made from an armature from an engine

But it will make an excellent cutter for wood carving. You just need to sharpen the ends of the anchor in the direction you need, and, on the contrary, bevel the opposite ends inward. Correct with a file.
Grinding head made from an armature from an engine

Grinding head made from an armature from an engine

Grinding head made from an armature from an engine

In the same way, you can make grinding heads of any size, even for a large drill. They work no worse than store-bought ones, as can be clearly seen in the video. Rust is removed, metal and wood are polished.
Grinding head made from an armature from an engine

Grinding head made from an armature from an engine

And most importantly, you can always replace the necessary sandpaper yourself, without buying ready-made ones in the store. The flat anchor cutter also performed well. Overall; as an alternative to a failed original - just right!

Watch the video


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Comments (1)
  1. Guest Alexander
    #1 Guest Alexander Guests 17 May 2019 20:02
    1
    Once I tried to make such a thing. I encountered a problem: if the engine rod is cut off, as the respected Author said, the plates from which the armature is assembled begin to shift relative to each other, or even fly apart in different directions. In the motor, it is the windings that hold them together (or I got one from some toy). I got out of the situation by soaking it in super glue. The overall impression is a good fit.