Knife Talk 2 Ed Fowler the Art Science of Knife Making by Unknown

Author:Unknown
Format: epub, pdf

Slack-belt grinding: Note that the tip of the blade is perched on the author's left thumbnail and the tang of the blade is held between his thumb and fingers The author's thumbnails are his homegrown grinding jigs. wide at the top. The 3-inch base is 2-1/2 inches above the center of the rubber drive wheel and supports the belt for slack-belt grinding. The 1-7/8 inch top allows rolling the belt over the edge of the platen for cleaning up the juncture where the blade and tang meet. The Iiams Platen is available through Jeff Carlisle, c/o Swains Spring Service, Dept. BL7, P.O. Box 1606, Great Falls, MT 59403 (406) 452-1246. It looks a little different than the one pictured but works the same. Additional Tips Do all initial work with a coarse belt. When a belt quits cutting, go to a fresh one. There is no benefit smoking up your shop using belts that are not doing the job. Dull belts do not cut clean lines or remoye steel efficiently. I establish the blade profile on a 36-grit belt, then gradually work down using the following grits: 36, 60, 120, 240, 3-M A30, A-16, and A-6. I then start buffing with a 3-M neutral Scotch bright 2x72-inch belt loaded down with Brownells 555 Gray buffing compound (available from Brownells, attn: B. Fenton, 200 South Front St., Dept. BL7, Montezuma, IA 50171-1000 (515) 623-5401), then to a loose muslin buffing wheel again loaded with 555 Gray. Remember: Position the blade edge down flowing with the direction of the buffer on these operations. The buffing surfaces will catch a knife edge or point. When you go to the finer belts or buffers, all you are seeking to accomplish at this point is to remove the scratches caused by the previous belt. Do not try to change profiles with fine-grit belts; all you do is wear out the belts and burn steel. When you observe deep scratches, back up one grit and clean them up, then head back down to the finishing belts. And one more thing. Old belts make excellent sandpaper. If you are like me, they will become like zucchini squash: soon you will have too many to store. Give them to your knifemaking friends until they won't take anymore, then start throwing them away. Author's note: A superlative discussion of all safety precautions is not included in this article. Safety practices involving the use of safety glasses, respirators or dust masks and filters, keeping flammable dust swept up, fire extinguishers on hand, etc., have been covered elsewhere and should be reviewed by all those involved regularly. I desired to include only topics I have not seen in print. 1 1 0 Forging, Grinding and Heat Treating

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