Good point Vic.... I can't really tell from the pics, but coloration change is a good indicator of "Possible" damage. Not all color change is severe. But, NO color change is usually very good.

Did you see any glowing red when grinding? (***Not always easy to see in bright lit areas!)

Was/Is there any color change to the blade: yellow, blue, black?

It MAY very well BE O.K..... I don't want to cause unjustified alarm. It really comes down to HOW you did the grinding.


I am assuming you used a benchtop grinder with high speeds... If you kept the blade moving across the wheel at a good pace and kept the blade cool by dunking or by patience between passes, it might be fine, if just a bit chewed up.

I tried to be clear, but if you know what you are doing (or maybe by pure luck <img src="/ubbthreads/images/graemlins/wink.gif" alt="" /> ), you can grind with a high speed grinder and likely not cause any damage.

My point is that that type of grinder is MUCH more likely to cause temper damage if used wrong.

When I refer to Benchtop grinder, this is what is commonly considered a Benchtop grinder (and is HIGH speed) - It is "generally" a VERY poor tool for working with fine grade quality steel such as knives and it CAN create heat VERY fast.:




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This is an angle grinder (also VERY High speed and also cabable of VERY fast creation of heat. - But, a "Hand" held tool. Great tool for demo and construction grade steel projects... in many cases. It is often used to "Cut" through steel, rebar, bolts or many similar applications - or grind them down. <img src="/ubbthreads/images/graemlins/thumbup.gif" alt="" /> - But, NOT for knives or quality steel!):





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This is actually a slow speed stone wheel grinder specifically designed for sharpening (But, this Delta tool is NOT very good (NOT worth a FLIP actually! <img src="/ubbthreads/images/graemlins/thumbdn.gif" alt="" /> and I wouldn't recommend - I have one! <img src="/ubbthreads/images/graemlins/thumbdn.gif" alt="" />) - It is about a $40 tool. For the same money, you can buy a Harbor Freight or similar 30"x1" belt sander that will do WAY more for Way more projects and WAY better for sharpening with the right belts (or even with cheap belts for that matter!) - My point being: "Don't waste your money on this!":





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Anyway, again, it is possible that if there is damage that it might just be very Minor damage which can be ground off (????) <img src="/ubbthreads/images/graemlins/crossfingers.gif" alt="" /> <img src="/ubbthreads/images/graemlins/thumbup.gif" alt="" />


It is likely very hard for any of us to determine damage if any from the pictures. <img src="/ubbthreads/images/graemlins/confused.gif" alt="" />



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