Primitive Archer
Main Discussion Area => Bows => Topic started by: osage outlaw on January 07, 2011, 05:57:01 pm
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I'm down to one sharp drawknife and figured it was time to learn how to sharpen them. What is the best/easiest way to do it? Do you work on both sides, or just one? Thanks for the help.
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It depends on the bevel...
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The flat side will not sharpened. The so-called mirror site is only polished at the grinding stone so that the sharpening burr disappears. Sharpen only the cutting phase with an wet-grinder.
Bernhard
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iv never sharpend a draw knife and i wont no need to they say it gets better with age brock
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Check out this you-tube video, or some of the other related ones. There's quite a few tricks to pick up.
With a draw knife, as the others are saying, you should mainly sharpen the upper side of the blade - the side that has already been grinded. The final sharpening/polish should be done to both sides, but only lightly on the underside - just enough to remove the burr from sharpening the upper side.
Using and keeping the tools sharp is really one of the more enjoyable sides to this craft, and well worth the effort. Both efficiency and quality goes up with sharp tools.
http://www.youtube.com/watch?v=YYnFL3zCYUY (http://www.youtube.com/watch?v=YYnFL3zCYUY)
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I agree that a drawknife needs to be sharp. Not dull as some say.
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This one should be spot on :)
http://www.youtube.com/watch?v=FG_eOfgNj54&feature=BF&playnext=1&list=QL&index=1 (http://www.youtube.com/watch?v=FG_eOfgNj54&feature=BF&playnext=1&list=QL&index=1)
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I have worked hundreds of osage staves, with green staves a sharp draw knife is desirable with seasoned staves a draw knife with a lesser angle than commercially produced draw knives and slightly dull seems to work better. But like most things personal preference will rule the day. The best draw knife for working seasoned osage is made from an old file and purchased at a flea market in Ohio 20 years ago. I keep my draw knives sharp by using a diamond hone and simply draw the blade towards myself at the correct angle then take the bur off the flat side. A draw knife is simply a huge plane blade with handles.
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I sharpen with a medium stone. I sharpen the beveled side keeping the same bevel. I use circular motions. I turn the knife over and sharpen the other side keeping the stone flat against the back. Before I put the knife away I oil it by putting some oil on a paper towel and running it over the knife. My knife was my father's and that'll be the day when I take a grinder or even a file to it. My knife is sharp and I've cut my finger doing this so exercise caution if you follow my advice. If you ever see a dull tool in my shop I'd sharpen it immediately. I'd never intentionally use a dull tool on anything. The only dull thing in my shop is me. I feel a rant coming on so I'm stopping this post. :) Jawge
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I read in an old woodworkers magazine that draw knives were designed to be dressed with a file that the woodworker would keep alongside his horse. My favorite is my double bevel drawknife. As said above some wood likes it sharp and some wood likes it not so sharp. Dull is not a good word. I may go through a dozen or so staves before dressing. Jim Hamm claims to have built 100 osage bows with a dull draw knife. Just personnal taste I guess. Also different woods respond differently. My spokeshave had seen several hundred staves before I hit an ancient nail and had to resharpen it. Steve
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I dont know much in the way of draw knives but a file is a great way to put a nice edge back on a blade. Follow that with a stone if your so inclined but I usually dont.
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I have a Block of Wood that I have stapled a sheet of 240 grit Emery Cloth to...and I just hold my Draw Knife at the same angle as the Bevel..and draw it like you are shaving wood...then turn it over and give it a swipe or two to knock off the rolled edge...that how I have always done it...beats a Grinder...Stone or File...and don't remove barely any steel to redo the edge
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I just give it a couple of swipes with a bench stone,brings it right back (Like any other knife) ' Frank
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I start off on my belt sander and only sharpen one side. I have three different drawknifes. One dull, one razor sharp and one in between. When taking osage down to a ring, I find a dull one is the ticket. You can make some big mistakes with a razor sharp one.
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I read in an old woodworkers magazine that draw knives were designed to be dressed with a file that the woodworker would keep alongside his horse. My favorite is my double bevel drawknife. As said above some wood likes it sharp and some wood likes it not so sharp. Dull is not a good word. I may go through a dozen or so staves before dressing. Jim Hamm claims to have built 100 osage bows with a dull draw knife. Just personnal taste I guess. Also different woods respond differently. My spokeshave had seen several hundred staves before I hit an ancient nail and had to resharpen it. Steve
Badger, what type of spokeshave do u use?
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I have a hard stone I use with a little fine oil just a couple slow even swipes every now and then will be fine just remember you have to keep the stone flat to the blade other wise you will round over the cutting edge and defeat the purpose.i thought about checking the blade angle and mount the stone some how into a jig and lock the blade in the jig and use a Diamond stone when you find a old blade that needs some real edge work. Now I use a good file to redo the edge on a draw knife that has been neglected like hanging from a old rusty nail in a old shed and not being touched for over fifteen years you know what I mean .
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I use an 80 grit sanding belt wrapped around a board. Just take a few strokes with the bevel down and then a light pass to clean the other side. Works for me. I learned it from a bow making video I bought several years ago.
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I have never used a dulled tool when me draw knife starts to dull after say dressing five or six staves down to dry It will start to pulling up wood and when it starts to not come out of a big bite by pulling up on the handles it's time to hit the edge just a touch is all it takes I did use a leather belt with brown stick polishing compound and cut my hand pretty bad now I don't do that anymore.