On 11/6/2015 10:59 AM, DerbyDad03 wrote:
Snip
Those rare earth magnets are kinda neat. They have a helluva lot of
pulling power for their small size. Seen some innovative gun mounts
made of them after being coated with rubber. A couple strategically
placed have no problem holding a 21oz to 35oz pistol horizontally or
vertically to a metal surface.
My first introduction to those magnets were when I was still in the
automotive business, 20 plus years ago. I was working for an AC/Delco
wholesale distributor. There was a particular part that came in a small
box about 1.5 x1.5 x1.5 inches. You could not pick the small box up off
of the steel bin with out the box opening and coming apart. You had to
slide the box to the edge of the shelf to overcome the pull of the
magnet. The part was a small wiper motor part. IIRC it had 4, 3/8"
long by 2mm diameter magnets evenly spaced around a round piece. The
magnets looked like wooden pencil leads. There could have been a dozen
of those parts in the tiny box.
My first introduction to rare earth magnets was when I was building Soap
Box Derby cars.
No, I didn't hide them in the front end for extra pull out of the
starting ramp. ;-)
http://www.ohio.com/news/local/soap-...andal-1.415481
We used them to hold down the hatch of the Masters cars. With a pair of
round rare earth magnets epoxied to both sides of the hatch up near the
driver's head, the hatch stayed down on the bumpiest of tracks or
even if we turned the car upside down, yet allowed for easy opening by
either the driver or the handler. The hatch is hinged right above the
#35 and extends back almost to the label on the side of the helmet.
http://i440.photobucket.com/albums/q...ps65263f4d.jpg
Some builders used Velcro straps or metal latches that the driver had to
engage/disengage from inside car. The rare earth magnets did their thing
with no user intervention required. While accidents were rare, I'd seen
enough that I wanted to allow for easy opening of the hatch either from
the inside or the outside just in case.
Very cool car! some how I was picturing an orange crate with wheels.
LOL Great work!
I used them on the model car display for my son many years ago.
The door on the front of the cabinet sets on the bottom ledge. Other
than that there are no hinges are latches. It is held in place by rare
earth magnets. You slide the door to one side or the other to over come
the pull of the magnets on the small screws below the surface on the
back side of the door stiles.