Grinding Gloat *PICS*
woodburnbob
>The first image is an ordinary tapered iron that I picked up in a package of "bargain cutters". The second shows a very handsome stamp, which I'd be curious if any of you recognize. The third is a flattening job. But, not just any old flattening job.
In the dead of winter I started going to a Wednesday night metal shop class ostensibly for over-the-hill adults and seniors at a local high school. Only a couple old guys and mostly kids in their 20s. Though not in the curriculum I weasled access to the KO Lee surface grinder and this week had a chance to work on 2 blades. Never used one before and was still able to figure out how to do it on my own.
That last photo is in fact straight off the surface grinder!
Sadly, it's less than perfectly flat. I now conclude that the back, which is pulled down by the magnetic chuck, must be pretty flat, or at least not capable of rocking slightly, else you evidently can get a slight distortion while grinding that unwinds once off the chuck.
I'll re-do this next week, when I hope to master the hydraulic control so that I can stand and watch technology do it for me. Incidentally, the blade didn't get in the slightest bit warm, despite dry grinding (but why should it? I was using about 0.001 depth and 0.020 crossfeeds and many hundreds of passes by hand.)
[Slight Editorial Comment: Somebody needs to get out there and assemble a list of all the high school shops in the country, how they're tooled and all the school board names and addresses so tax-paying gallots everywhere can get a grass-roots movement going and press for some recompense for all them taxes over the years. "Sure, I'll vote your way...when you open up that school shop in the evenings...i.e., most evenings and weekends".]
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