Re: Homemade magnetic indicator base

prfesser@xxxxxxxxxxx wrote:
Hello all:

FWIW, some time ago I ordered some rare-earth ring magnets from Lee
Valley:
http://www.leevalley.com/hardware/page.aspx?c=2&p=42348&cat=3,42363

Got a few of the 1" dia rings and the cups to hold them as shown on the
page. The cup has a countersunk hole for mounting.

Lately I've been very annoyed with my el-cheapo-brand magnetic
indicator base, but was unwilling to pay for a quality base. Over the
weekend I found one of the ring magnets in its cup (once in the cup it
will never come out...), reamed out the hole by hand for a few moments,
and slid a 1/4 x 20 x 3/4" long FH screw through the hole. (Picking the
shavings off the magnet gives a new definition to "fun.")

Unscrew the magnetic base from my old indicator holder, toss it in the
trash. Saw off the stud that had screwed into the holder, drill and
tap that rod for 1/4 x 20. Screw on the new rare-earth-magnet base.

It holds much better than the old base did, but just grab the rod and
tilt it a bit, and the base comes unstuck from the lathe. As a bonus
it's not as big and bulky as the old base was. The downside is that I
still have to pick shavings off the base, but I can live with that.
I'll just learn to machine only aluminum and plastic....<grin>

Best -- Terry


Make a "shower cap" for your base by slipping a plastic sandwich bag over it. When you take off the base, just pull off the plastic, inverting it over the chips, then empty out the chips in the trash and put the plastic back over the base. If "shower cap" isn't macho enough, call it a "condom" .. :-)

GWE
.

Relevant Pages

  • Re: Hall effect sensor
    ... I have found small inexpensive ring magnets ... a gear tooth sensor should be just fine. ...
    (sci.electronics.basics)
  • Re: Homemade magnetic indicator base
    ... some time ago I ordered some rare-earth ring magnets from Lee ... tap that rod for 1/4 x 20. ...
    (rec.crafts.metalworking)
  • Homemade magnetic indicator base
    ... some time ago I ordered some rare-earth ring magnets from Lee ... tap that rod for 1/4 x 20. ...
    (rec.crafts.metalworking)
  • Re: Homemade magnetic indicator base
    ... some time ago I ordered some rare-earth ring magnets from Lee ... When you take off the base, just pull off the plastic, inverting it over the chips, then empty out the chips in the trash and put the plastic back over the base. ...
    (rec.crafts.metalworking)