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??? ??? Good thing we don't have too many Simon Bar Sinister's around? . animal

??? ??? just saw that yesterday? , haven't given it a full read yet . ??? animal

Yeah, we went around and around on this a while back. The concept of “it’s the melting point of the enamel on the motor coils” that sets the temperature limit seems to have escaped Dave.

And if anyone isn’t aware, brushes have different hardness grades. The trade off is soft brushes need replacing more often but don’t wear the commutator, and the opposite for hard ones. Of

Whole lot of “maybes” in that article. Also says the excess water will be up there for “maybe 10-15 years”, while if you read the actual paper is says “maybe 5-10 years”, so who know what

See responses below sbcglobal.net@groups.io> wrote: No, there is NO humidity, it is 40C which is 104F. Also, the first elevation is from 0m to 999m No, as you go higher, air is thinner and

If remember NEMA ia at sea leave I think at 40% humidity. So high you go less cooling. I have different outside temperature most are 105°F max for maximum horse power. If go hot hotter you need

Nope, that is not how it works. Per NEMA, the maximum ambient temp is 40C (104F). There is a required reduction for altitude (up to 1000m 40C, up to 2000m 30C, up to 3000m 20C). The IEC ratings are

Yes I can see now from the closer photo that the holder is molded as part of the end cap so clearly not a separate piece. I suppose the complete motor end cap complete with brushes might be available

Ralph, . I'm a little bit out of order in these messages...This should have been included with my previous message, and was not. . Looking at your image of your

Ralph, . Your brush does appear to have a direct wire that is not utilized to it's best capacity as the power still enters the brush through the brass tube via many tiny contact points where the

Yes Jon, it is not a good design. I am having problems reinstalling the brushes. Possible the threaded cap got deformed, as I cannot insert the brush tab. [image: IMG_20240709_161647431.jpg] I made

Ralph, In a previous photo you provided, it shows the power wire wrapped loosely(spring touching in multiple tiny points), around the brass part of the brush holder assy. The power has to go through

Ralph, did you check the resistance between the contacts of the commutator. Regarding the health of the contacts, solderings may have not resisted to the heat, they possibly had melted or

It is what motor companies say. There a lot goes to figuring heat transfer. It is only a simple way of figuring out the limits. Dave

Thanks Ralph animal

You can’t add temparures like that. It is not linear. Without going into the science, maybe an easy why to explain it is that the rate that heat moves depends on the difference in temperature. So

Mike, the brush is 7.8mm wide, 4.9mm thick and 15mm long. The problem you see is because the stick I used for alignment was smaller then the actual brush holder. That is why it is off. There probably

Most motor are rated on any machine tool is rated for the rize in temperature. So if shop at 80° and motor rated 120° rize.The motor temperature is 200° Now with today's temperature where I live is

When doing a lot motor repair it hard to get the parts. I even took brushes and file down to fit. I had older motors for parts. Getting parts has always been a problem. FYI Ebay can easier to find