Re: OT-how to test and repair DC brushed motors.
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Crocus cloth is like really fine sand paper. Like 3000 grit. As Mike said, it's jeweler's rouge, or very finely divided iron oxide with a bit of a carrier, likely grease or wax. Or you can get sticks of the jeweler's rouge, and use them on buffs. IIRC, my dad recharged his razor strop with jeweler's rough. It will give a very fine polish on steel, iron, and silver, that I've used it on. You do have to wash it off, afterwards though.? Bill in OKC William R. Meyers, MSgt, USAF(Ret.) Aphorisms to live by: Good judgement comes from experience. Experience comes from bad judgement.? SEMPER GUMBY! Physics doesn't care about your schedule. The only reason I know anything is because I've done it wrong enough times to START to know better. Expect in one hand, expectorate in the other. See which one gets full first.
On Tuesday, September 5, 2023 at 09:58:16 PM CDT, mike allen <animal@...> wrote:
Yea I wouldn't use it on a armature either . Handy thing to have a roll of if yer building / rebuilding a engine . According to Ehow they say it's s like sand paper , I wouldn't go near a crankshaft or armature with sand paper . I did a google for Crocus & that's where I found the Ehow line . I don't think I would buy it on Amazon , but I did see that MSC has a 60' roll for $27 & some change , That's around what I paid for my last roll @ 25 years back . Thanks for making me look again . I asked for it when I was at a
Grainger a few years back & they said never heard of it . thanks animal On 9/5/23 7:20 PM, Jim F wrote:
Crocus cloth has jewelers rouge impregnated in it. ?I wouldn¡¯t use
it.?
I¡¯ve had good success with a fresh pink pearl eraser. It
removes the carbon pretty good.? On Sep 5, 2023, at 7:11 PM, mike allen <animal@...> wrote:
??? ??? Like Crocus Cloth , I haven 't seen that in years
. Fixed plenty of crankshafts with Crocus Cloth animal On 9/5/23 5:17 PM, Dave
Matticks wrote:
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A lot of people say they take some ¡°emery¡± to it!
Aluminum oxide and sometimes
silicon carbide yes but don¡¯t think I¡¯ve even touched a
piece of ¡°emery¡± cloth in decades!
Emery is s specific abrasive
just like the others.
For what it¡¯s worth.
Dave
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Bill in OKC too