Here's another take on putting a used toothbrush to good use. My toothbrush seems to wear out within a month and worse still, only the top half of the brush wears out while the bottom half seems fine. Must be something wrong with the way I brush my teeth. But not to worry, this ible is sure to put a smile back on ones face, by that I do not mean to use the rotary tool bristle brush as a substitute electric toothbrush.
2. brill bit
3. hacksaw blade or rotary tool circular saw
4. metal file or sandpaper
5. nose plier
It is important to make sure the final brush does not vibrate when used with the rotary tool. For this the brush needs to be symmetric in terms of weight and the mandrel needs to be attached at the exact center of a circle when the brush rotates. For example the picture below shows a possible layout.
The bristles at the four corners that the circle intersects need to be removed completely using the nose plier.