Couldn't ask for an easier way to get the caliper on and off the lathe. Well done!
Have you seen the largest neodynium magnet that K & J sells? It warns people not to buy it unless they really know what they are doing. The 4 inch cube comes in this very thick walled wood box so it doesn't fix itself to the floor of the delivery truck.
Those hard disk magnets are probably strong enough to drive a through-the-glass motion transmission device.
Jon showed an example of a magnetic system for washing the outside of glass windows that can't be reached manually. Maybe a device to clear bug smears from the windshield without leaving the car?
A rotary motion transmission could drive a moving display item inside an aquarium without the need to penetrate the glass/plastic.
Laboratories use a stirring system for sealed flasks that consists of a magnet immersed in the fluid rotated by an external field generated in the heating platform on which the flask is placed. I'm not sure how the rotating field is generated; could be done electrically or via a magnet rotated by a motor.
Then there's the whole world of magnetic gears.
An introduction to the subject...
Because magnetic gears are not in physical contact friction is negligible so they are favored by clockmakers. Here are some examples...
Bob Mackay - Magnetic Clock
and, for more detail, a build thread of the clock that was featured in Digital Machinist magazine...
Last edited by mklotz; 01-02-2019 at 11:11 AM.
Hidden latches with nothing showing on the exterior are fun to design for small boxes such as jewelery or keepsake containers. The "key" is a magnet used to move a steel pin inside the box, thus freeing the lid.
Magnets from hard drives in various uses in the house and garage. I have a stack of drives from which to retrieve the magnets.
Tool board, Metal door hook in garage, Pruning shear holder, Chisels on basement joist, Hammer on garage stud, Chisels on garage wall, Curtain on metal door, Cord keeper on table saw, Clothes hook on basement duct work, Clamps on basement joist.
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