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#1
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using buffing wheel to sharpen planes and chisels
I've been reading about using buffing wheels as the final step in
honing/polishing a plane or chisel and there is always discussion about "rounding off the bevel" and it's implied that this is bad. What exactly does that mean, how does it happen, and what's bad about it? Thanks. Charles |
#2
Posted to rec.woodworking
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using buffing wheel to sharpen planes and chisels
On Feb 25, 8:31 am, wrote:
I've been reading about using buffing wheels as the final step in honing/polishing a plane or chisel and there is always discussion about "rounding off the bevel" and it's implied that this is bad. What exactly does that mean, how does it happen, and what's bad about it? It means that you 'round off the bevel', it happens when too much time/ pressure/agression is used on the wheel and because the wheel isn't a flat plane, and it dulls the blade you worked so hard to get sharp. The final steps in sharpening are tiny adjustments and power tools are not needed. R |
#3
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using buffing wheel to sharpen planes and chisels
"RicodJour" wrote in message ... On Feb 25, 8:31 am, wrote: I've been reading about using buffing wheels as the final step in honing/polishing a plane or chisel and there is always discussion about "rounding off the bevel" and it's implied that this is bad. What exactly does that mean, how does it happen, and what's bad about it? It means that you 'round off the bevel', it happens when too much time/ pressure/agression is used on the wheel and because the wheel isn't a flat plane, and it dulls the blade you worked so hard to get sharp. The final steps in sharpening are tiny adjustments and power tools are not needed. Strops made of hard felt, or leather over disks charged with fine compound do a great job on an edge. You strop with the wheel running away from the edge and don't press the tool into the compound/surface, and you won't round over. Whether or not you need a stropped edge on a plane iron is up to you. On a chisel, never. OTOH, carving tools designed for hand power benefit greatly. |
#4
Posted to rec.woodworking
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using buffing wheel to sharpen planes and chisels
wrote in message ... I've been reading about using buffing wheels as the final step in honing/polishing a plane or chisel and there is always discussion about "rounding off the bevel" and it's implied that this is bad. What exactly does that mean, how does it happen, and what's bad about it? Thanks. Charles Better to sharpen, buff to polish that surface and then return to the stone, increase the grind angle 1 - 2 degrees and create a micro bevel by making "1" or "2" passes, no more. The polished edge decreases friction on the larger surfaces that come in contact with the wood. The micro bevel is very small, typically 1/64" - 1/32" in width and does not create much drag. Then a return trip to the buffing wheel for a "moment" to remove the wire edge created when grinding the micro bevel. |
#5
Posted to rec.woodworking
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using buffing wheel to sharpen planes and chisels
Charles The kind of buffing wheel you use for this is called a "hard felt buff" and it is very dense almost as hard as a piece of wood. When you round the edge over you increase the force needed to use the tool, not good. With a hard felt buff and compound you can deburr,hone and microbevel in one pass. A good hard felt buff is $40 us or more for 6" It does not matter how sharp the tool is if the cutting edge itself is not the first part of the tool to contact the work. Daily Grind |
#6
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using buffing wheel to sharpen planes and chisels
Depends on what type of wheel and compound you use. Only black, brown
and white will take off metal. Red and blue will definately just polish. There's a good guide to polishing metal at http://www.caswellplating.com/buffs/buffman.htm. The pdf on that page has some great info on wheel types, grits and materials. I've tried buffing plane blades to slicken them up but didn't notice a difference in use. |
#7
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using buffing wheel to sharpen planes and chisels
What exactly does that mean
Basically, it means you're changing the edge from a V shape to a U shape. Ideally, a buffing wheel that's "charged" with honing compound can put a very nice final polish on edge tools, and polish out the tiny scratches left by your finest sharpening stone, leaving the edge even sharper. However, it's relatively easy to actually make the edge worse on a buffing wheel - rounding over occurs if you hold the blade against the wheel for too long or if you hold it at the wrong angle. You can achieve a similar effect by "stropping" on a piece of thick, hard leather that's been charged with honing compound. Set the leather on a flat surface, and hone the blade with a motions that lead away from the cutting edge. In other words, you shouldn't be using a shaving motion that would let the blade gouge the leather - push or pull it the other direction. I prefer this as I feel like I have more control, and it moves slower than a power wheel so you can't mess it up as quickly. Hope this helps, Andy |
#8
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using buffing wheel to sharpen planes and chisels
On Feb 25, 8:31 am, wrote:
I've been reading about using buffing wheels as the final step in honing/polishing a plane or chisel and there is always discussion about "rounding off the bevel" and it's implied that this is bad. What exactly does that mean, how does it happen, and what's bad about it? Thanks. Charles Try to *lightly* buff about 1/8" back from the edge. The wheel will depress just enough to strop the actual edge without taking it out of flat. If it does go out of flat, a couple of strokes across your fine stone will fix it. |
#9
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using buffing wheel to sharpen planes and chisels
On Mon, 25 Feb 2008 16:42:44 -0800 (PST), Andy
wrote: You can achieve a similar effect by "stropping" on a piece of thick, hard leather that's been charged with honing compound. A Tormek does the same. |
#10
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using buffing wheel to sharpen planes and chisels
On Wed, 27 Feb 2008 18:45:42 -0500, "Bonehenge (B A R R Y)"
wrote: On Mon, 25 Feb 2008 16:42:44 -0800 (PST), Andy wrote: You can achieve a similar effect by "stropping" on a piece of thick, hard leather that's been charged with honing compound. A Tormek does the same. You can also use a scrap piece of MDF charged with honing compound to strop the knife. Sounds funny but it works very well. |
#11
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using buffing wheel to sharpen planes and chisels
On Feb 28, 11:12 am, Modat22 wrote:
On Wed, 27 Feb 2008 18:45:42 -0500, "Bonehenge (B A R R Y)" wrote: On Mon, 25 Feb 2008 16:42:44 -0800 (PST), Andy wrote: You can achieve a similar effect by "stropping" on a piece of thick, hard leather that's been charged with honing compound. A Tormek does the same. You can also use a scrap piece of MDF charged with honing compound to strop the knife. Sounds funny but it works very well. Chrome green watercolor on a strip of plywood. |
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