{"id":51,"date":"2006-02-10T21:01:00","date_gmt":"2006-02-11T04:01:00","guid":{"rendered":"http:\/\/www.bohls.org\/wordpress\/?p=51"},"modified":"2025-05-30T17:12:31","modified_gmt":"2025-05-30T21:12:31","slug":"diamond-bench-stone-pt-2","status":"publish","type":"post","link":"http:\/\/www.bohls.org\/blog\/2006\/02\/10\/diamond-bench-stone-pt-2\/","title":{"rendered":"Diamond Bench Stone, pt. 2"},"content":{"rendered":"

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My biggest problem now is with getting the angle right for the bevel. I’m using the basic generic honing guide, the single-roller one you can get just about anywhere. I can just jam the blade in the guide and get any old angle, but the problem is trying to get an angle that I want and, even more important, being able to repeat that angle.<\/p>\n

But I think what I remember from high school trig will help out here. We all remember soh-cah-toa, don’t we? The sine of an angle in a right triangle is the length of the opposite side divided by the length of the hypotenuse. From our diagram above, we get sin \u03b8 = b \/ c<\/strong>. And here b<\/strong> is the height that the honing guide holds the blade and c<\/strong> is the length of the blade that sticks out of the guide. And a<\/strong> of course is the sharpening stone. So<\/p>\n

sin \u03b8 = b \/ c<\/strong><\/p>\n

Or, for our purposes<\/p>\n

c = b \/ sin \u03b8<\/strong><\/p>\n

Let’s imagine that the height b<\/strong> is 5\/8″ and we want a bevel angle of 25\u02da. So, 5\/8 divided by the sine of 25 is 1.47887598947 inches. Let’s call that 1 1\/2″ okay? For a 30\u02da bevel angle, c<\/strong> would be exactly 1.2500″.<\/p>\n

I just need to set up a block or something and scribe some measurements on it to be able to repeat the angles. And measure the height of the honing guide exactly, rather than using 5\/8″ as we did in our example.<\/p>\n

And there are two different places the guide holds blades, sort of an upper area for plane irons and a lower for chisels. Have to note different c lengths for the two different settings as well.<\/p>\n

But better that than the Veritas Mk.II for $48.50, huh? Although the Mk.II does have a better way of making sure the blade is set square to the stone …<\/p>\n","protected":false},"excerpt":{"rendered":"

My biggest problem now is with getting the angle right for the bevel. I’m using the basic generic honing guide, the single-roller one you can get just about anywhere. I can just jam the blade in the guide and get any old angle, but the problem is trying to get an angle that I want … Continue reading Diamond Bench Stone, pt. 2<\/span> →<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[12],"tags":[],"class_list":["post-51","post","type-post","status-publish","format-standard","hentry","category-woodworking"],"_links":{"self":[{"href":"http:\/\/www.bohls.org\/blog\/wp-json\/wp\/v2\/posts\/51","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/www.bohls.org\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/www.bohls.org\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/www.bohls.org\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/www.bohls.org\/blog\/wp-json\/wp\/v2\/comments?post=51"}],"version-history":[{"count":2,"href":"http:\/\/www.bohls.org\/blog\/wp-json\/wp\/v2\/posts\/51\/revisions"}],"predecessor-version":[{"id":1478,"href":"http:\/\/www.bohls.org\/blog\/wp-json\/wp\/v2\/posts\/51\/revisions\/1478"}],"wp:attachment":[{"href":"http:\/\/www.bohls.org\/blog\/wp-json\/wp\/v2\/media?parent=51"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/www.bohls.org\/blog\/wp-json\/wp\/v2\/categories?post=51"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/www.bohls.org\/blog\/wp-json\/wp\/v2\/tags?post=51"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}