Sanding the horn commutator

[Elcastor]

Reading an old thread one person said to "Use 600 sandpaper. Not Wet or Dry. When I did mine I started with 600, went to, 1000, and finished with 1500."

Can anyone explain what is the problem using wet or dry sand paper? Just wondering.

[mccsix]

Not an expert here but I was always lead to believe you shouldn't use sandpaper of any grit, because the silicone could glaze over on the comm and the gaps. I was told to use emery cloth instead.

[Tiny]

I used emery cloth also, worked great.

[H. L. Chauvin]

FWIW, my experiences, any fine sandpaper will always work.

Clean out grooves & polish.

Afterwards, thoroughly clean commutator with a cleaning solvent using something like a tooth brush.

Toothbrushes can also works well on cleaning one's teeth -- keep them separate!

[tudoor]

I was always told to use flint paper for all motor commutators. Don't know why but come from an old man that rebuilt starters and generators for fifty some odd years.

[lindy williams]

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Emery and silicone carbide are electrically conductive. If any of the grit stays between the commutator segments they can short out the two adjoining segments. Garnet paper is not conductive and therefore safer to use.

[BILL WILLIAMSON]

[QUOTE=H. L. Chauvin;

Toothbrushes can also works well on cleaning one's teeth -- keep them separate![/QUOTE]
Easy, H.L, The Dog's toothbrush has a bone lookin' handle, don't think he ever uses it, as it's NEVER wet! Bill W.

[glenn in camino]

I clean mine with acetone. Works great.

[Elcastor]

Originally Posted by lindy williams

Emery and silicone carbide are electrically conductive. If any of the grit stays between the commutator segments they can short out the two adjoining segments. Garnet paper is not conductive and therefore safer to use.

Thanks! That was the type of information I was looking for. I just finished sanding mine (used Wet or Dry, as that was all I could find here in my small town in Mexico) and all is well. Lubrication, cleaning, and sanding the commutator all worked together to produce a robust horn now!

[H. L. Chauvin]

Bill,

Buster-T probably is avoiding letting humans know all of his talents.

Right after you go to sleep he probaby reads the newspaper, then brushes his teeth before he goes to sleep -- next morning, naturally his toothbrush is dry -- what can one expect.

One should never underestimate a canine's true understanding of life -- they never waste their time worrying; they hold no grudges; they express thanks when they receive food or drink; one hug is worth millions to them; they can read minds & feelings of humans better than any psychologist; they fully understand how to brighten the day of the elderly in despair in nursing homes & assisted living; -- they are so precious to so many people just like you who really understands them.

Also, they cherish Model A rides with their very good buddies.

[CHerdic]

Acetone on the teeth might work, but it may be rough on gum tissue.