12-27-2017, 08:55 PM
Mr. Jan – Thanks for the definitions. Most interesting to know the various types of heating are well defined.
I am left wondering how this relates to real world impact on a blade, and how much the blade is actually heated, especially with light pressure sharpening where the overall background heating is very low.
Flash heating would seem to be heat that equals or exceeds the original HT temperatures. I would think that grain heating would add to the background heating and/or be more or less completely responsible for it.
In my original post I was talking about a situation where background heating is minimal.
I wonder what this all really means. How much does belt speed matter, how much flash heating actually matters, and what the real world ramifications of fairly low level background heating during sharpening is.
Mr. Me2, Other than my malleable burr suspicions, your observations of blade denting are the only real world evidence that I have seen posted about the deleterious affects of minimal blade heating. I say minimal because I doubt any sharpener that would be concerned about this stuff would ever significantly overheat a blade during sharpening.
Mr. Ken, What??? Remove my actual Baldor labeled motor? You are right. Gosh Mr. Ken, that would indeed be heresy! A variable speed motor? What a novel idea!
Mr. Me2 mentioned that flash heating of 3,000° F can be produced by hand sharpening on a dry stone. If that is true, (really?) how much would a variable speed motor matter? How much does flash heating actually affect the edge? How far does flash heating penetrate into the blade?
Mr. Jan has shared the current understanding of heat generation during grinding. I’m sure that those definitions apply to any type of grinding process, but I’m still left wondering what it all means in real world sharpening with Kally.
I am left wondering how this relates to real world impact on a blade, and how much the blade is actually heated, especially with light pressure sharpening where the overall background heating is very low.
Flash heating would seem to be heat that equals or exceeds the original HT temperatures. I would think that grain heating would add to the background heating and/or be more or less completely responsible for it.
In my original post I was talking about a situation where background heating is minimal.
I wonder what this all really means. How much does belt speed matter, how much flash heating actually matters, and what the real world ramifications of fairly low level background heating during sharpening is.
Mr. Me2, Other than my malleable burr suspicions, your observations of blade denting are the only real world evidence that I have seen posted about the deleterious affects of minimal blade heating. I say minimal because I doubt any sharpener that would be concerned about this stuff would ever significantly overheat a blade during sharpening.
Mr. Ken, What??? Remove my actual Baldor labeled motor? You are right. Gosh Mr. Ken, that would indeed be heresy! A variable speed motor? What a novel idea!
Mr. Me2 mentioned that flash heating of 3,000° F can be produced by hand sharpening on a dry stone. If that is true, (really?) how much would a variable speed motor matter? How much does flash heating actually affect the edge? How far does flash heating penetrate into the blade?
Mr. Jan has shared the current understanding of heat generation during grinding. I’m sure that those definitions apply to any type of grinding process, but I’m still left wondering what it all means in real world sharpening with Kally.