DeMag

This is a demagnetiser for small parts.

My idea isn't new. A very good description of a similar demagnetiser has for example been given by Mark Presling (https://www.homemadetools.net/forum/diy-demagnetising-tool-works-72881). What is new is that I have 3-D printed the holder for the magnets. It has a 12mm shaft that can be inserted into a eg drill press. It works like a charm.

My design was done in a parameterised model using Fusion 360. This was exported as an .stl file before being imported into Cura and 3D printed.

I recently needed to use an end-mill to machine a fly-cutter using mild steel. However, it was soon clear that the chips were not being thrown off but were clinging to the end-mill - producing a very worrying grinding sound as the chips which were trapped between the end-mill and the sidewall of the stock were being recut. having previously only machined aluminium, this was not a problem. Clearly, storing my end-mills in a tray with a magnetic base was not a go