I finally have my sharpening jig ready. What I have been doing is letting all my KD hardwood purchases season in my shop for another year after purchase, and now I have stock coming out of the pipeline. My shop runs about +60dF and +/- 5% RH in wintertime, even lower target EMC for the few weeks it is really really cold here. Looking for -30dF again tomorrow night, it will probably get down to +50dF in the garage/shop and the RH will be low enough I don't trust my meter.
I cut up a piece of Ash to make a ramp for my belt sander, and a piece of red oak for the radius. These ideas are in Leonard Lee's _Complete Guide to Sharpening_ (c 1995) and I know we have learned a thing or two in the last 25 years. The guide for putting radii on plane irons he illustrated on pp 81 in my copy.
I have a bench grinder also, but added on a belt sander after reading up on sharpening a bent gouge in Mr. Lee's book. The next boat I want to build has a bunch of joinery in it, and I need a bent gouge sharp as all heck to shape the forefoot, so I am making stuff with corners on it and learning to sharpen on a belt sander.
I see two areas that require particular attention.
First, since all my plane irons are slightly different lengths I am having to hold them perpendicular to the sanding belt by eye, and free hand slide them side to side on my guide. But the metal guide that comes with my Kalamazoo 1SM (no affiliation, great product) is only attached on one side, so I have to check for square right regular.
Second, I don't know yet how much the Ash ramp will move when the humidity goes up in April.
Third, I haven't figured out how to polish flat backs with the belt sander yet.
The most acute angle I can get is 28 degrees in wintertime, but there is some room at the lip to rise the tail of the ramp and dial in 30-35 degrees no problem. For now I have scrubs with 3 inch radius and 7 inch radius, but if I want a five I can rough it on the grinder and bring it home with the jig I have.
Also, if you go down this rabbit hole don't bother with a leather stropping strap. It has way too much give and will round off your edge. Just get a smooth piece of hardwood a la Derek Cohen, put some rouge on it and use that in a vise.
What else do you suppose I should look out for?
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