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How to use a countersunk pot magnet?

How to use a countersunk pot magnet

Industrial sized fridge freezer Countersunk pot magnets can be attached to non-ferromagnetic materials with the help of a countersunk screw; for example, to hold heavy fridge doors open and closed.

To attach the countersunk pot magnet to a non-ferromagnetic material, you will need to do the following:

Equipment required:

Countersunk pot magnet, countersunk screw, cordless drill driver, forstner drill bit
  • 22.23mm (0.88″) forstner drill bit
  • Cordless drill driver
  • 12.7mm (0.5″) countersunk screw, such as a wood screw
  • 19.05mm (0.75″) countersunk pot magnet
  • Slotted screwdriver
Wonkee Donkee says "There are smaller or larger forstner drill bits and flat head screws available, depending on the size of your magnet"
Forstner drill bit drilling a hole into a piece of wood for the magnet

Step 1 – Drill hole

Use the cordless drill driver with the forstner drill bit attached to drill a flat-bottomed hole into a piece of non-ferromagnetic material, e.g. a piece of wood. The forstner drill bit will produce a hole of a consistent depth with smooth sides, which is ideal to insert the countersunk pot magnet into.

Flat drill bit A flat drill bit may also be used for this task, however it will not leave as neat a hole as the forstner drill bit due to its sharp pointed end
Attaching a countersunk magnetic disc

Step 2 – Insert countersunk magnet

Clear the hole of any wood chippings and insert the countersunk pot magnet with the countersunk hole facing upwards.


Step 3 – Fasten with screw

Fasten the countersunk magnet with the flat headed screws using a screwdriver. Continue doing this until the screw is flush (level) with the top of the countersunk pot magnet.

Wonkee Donkee says "Make sure you do not over tighten the  screw as the magnet is very brittle  and may break"

Wonkee Donkee Tools