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#1
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Jointer knife sharpening
I have 3 sets of dull (not nicked) jointer knives that need sharpening
desperately. I can't decide if I should send them out somewhere for sharpening or purchase a grinder such as the Makita 9820-2 Sharpener. I live in the northern boondocks of Minnesota and there isn't a sharpening service anywhere near me. Has anyone had experience with the Makita Sharpener or can recommend a place where I can send knives for sharpening. Thanks Wayne |
#2
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Jointer knife sharpening
I don't know about northern mn, there is a place in st. paul that I take
my stuff. I don't think you can send stuff to them though. In the past couple months in various woodworking rags they posted a little jig to sharpen jointer knives. Basically it is a peice of wood that has two angles cut in them so the knives are exposed flat. Then you just sand over the top of them with a sanding block, 200, 400, 600, 800...you get the idea. Crude picture of it..... |/----\| -------- Wegge wrote: I have 3 sets of dull (not nicked) jointer knives that need sharpening desperately. I can't decide if I should send them out somewhere for sharpening or purchase a grinder such as the Makita 9820-2 Sharpener. I live in the northern boondocks of Minnesota and there isn't a sharpening service anywhere near me. Has anyone had experience with the Makita Sharpener or can recommend a place where I can send knives for sharpening. Thanks Wayne |
#3
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Jointer knife sharpening
Wayne,
I have the Makita sharpener, it will do a great job but its way overkill if all you want to sharpen is jointer knives. But if you have some planer blades that need sharpening, some good chisels and hand-plane blades and turning tools - then it can be a good investment. But for jointer blades alone I can think of several low cost ways to sharpen them yourself. You can Use Scary Sharp (see below) along with the Veritas (Lee Valley) jointer blade holder - which works great, or you can make a shop-made holder for the blades. Take a piece of ~6/4 hardwood about 3" wide or so and cut 3 slots in it to hold the blades at the correct angle. This will work nicely if the jointer blades are 1/8" thick or I should say, as thick as your tablesaw blade. If they're less, shim with some masking tape. A little trial and error to get the depth of the slots cut but it only has to be deep enough for the blades to stick a bit proud of the surface of the block of wood. Set your tablesaw blade at the same angle as the bevel on the jointer blade an then set the height of the tablesaw blade so it's makes a cut deep enough in the block of wood so that the bevel of the jointer blade is about the thickness of your thumbnail above the block when the blade is inserted in the block. The distance between the slots is not critical but make it equidistance so when using the block it does not rock. Using Scary Sharp methods (fine sandpaper and a flat surface), place the 3 jointer blades in the block (press fit them in) and then with the sharp edges down, slowly but firmly work the blades back and forth over the sandpaper that is attached to a flat surface. About every ten strokes, turn the block 180° so you sharpen the blades evenly. Depending on the fit of the blades in the slots you may have to shim them so they fit tightly in the slots. You may also have to rig up a stop on each end of the block to keep the blades from sliding out of the slots but I've found that shimming the blade with masking tape or even Scotch tape is enough to hold the blades in. You want a press fit. After they're sharpened, you'll need a small screwdriver or something to lift the edge of the blades out of the slots. You can get real fancy making a jig for doing this to insure the blades are exactly the same width side to side but in the end, as long as the edge is flat the length of the blade is what matters. When you put the blades back in the jointer, any differences in blade width will be adjusted out at that time. But....if you're hell bent on spending some money, the Makita was highly rated at the time I got mine. Some links for reference: http://www.shavings.net/SCARY.HTM Veritas jointer blade holder http://www.leevalley.com/wood/page.a...urrency=2&SID= http://www.tools-for-woodworking.com/product.asp?3=1460 Bob S. "Wegge" wrote in message ... I have 3 sets of dull (not nicked) jointer knives that need sharpening desperately. I can't decide if I should send them out somewhere for sharpening or purchase a grinder such as the Makita 9820-2 Sharpener. I live in the northern boondocks of Minnesota and there isn't a sharpening service anywhere near me. Has anyone had experience with the Makita Sharpener or can recommend a place where I can send knives for sharpening. Thanks Wayne |
#4
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Jointer knife sharpening
Thanks guys, I will explore some of your suggestions
Bob S. wrote: Wayne, I have the Makita sharpener, it will do a great job but its way overkill if all you want to sharpen is jointer knives. But if you have some planer blades that need sharpening, some good chisels and hand-plane blades and turning tools - then it can be a good investment. But for jointer blades alone I can think of several low cost ways to sharpen them yourself. You can Use Scary Sharp (see below) along with the Veritas (Lee Valley) jointer blade holder - which works great, or you can make a shop-made holder for the blades. Take a piece of ~6/4 hardwood about 3" wide or so and cut 3 slots in it to hold the blades at the correct angle. This will work nicely if the jointer blades are 1/8" thick or I should say, as thick as your tablesaw blade. If they're less, shim with some masking tape. A little trial and error to get the depth of the slots cut but it only has to be deep enough for the blades to stick a bit proud of the surface of the block of wood. Set your tablesaw blade at the same angle as the bevel on the jointer blade an then set the height of the tablesaw blade so it's makes a cut deep enough in the block of wood so that the bevel of the jointer blade is about the thickness of your thumbnail above the block when the blade is inserted in the block. The distance between the slots is not critical but make it equidistance so when using the block it does not rock. Using Scary Sharp methods (fine sandpaper and a flat surface), place the 3 jointer blades in the block (press fit them in) and then with the sharp edges down, slowly but firmly work the blades back and forth over the sandpaper that is attached to a flat surface. About every ten strokes, turn the block 180° so you sharpen the blades evenly. Depending on the fit of the blades in the slots you may have to shim them so they fit tightly in the slots. You may also have to rig up a stop on each end of the block to keep the blades from sliding out of the slots but I've found that shimming the blade with masking tape or even Scotch tape is enough to hold the blades in. You want a press fit. After they're sharpened, you'll need a small screwdriver or something to lift the edge of the blades out of the slots. You can get real fancy making a jig for doing this to insure the blades are exactly the same width side to side but in the end, as long as the edge is flat the length of the blade is what matters. When you put the blades back in the jointer, any differences in blade width will be adjusted out at that time. But....if you're hell bent on spending some money, the Makita was highly rated at the time I got mine. Some links for reference: http://www.shavings.net/SCARY.HTM Veritas jointer blade holder http://www.leevalley.com/wood/page.a...urrency=2&SID= http://www.tools-for-woodworking.com/product.asp?3=1460 Bob S. "Wegge" wrote in message ... I have 3 sets of dull (not nicked) jointer knives that need sharpening desperately. I can't decide if I should send them out somewhere for sharpening or purchase a grinder such as the Makita 9820-2 Sharpener. I live in the northern boondocks of Minnesota and there isn't a sharpening service anywhere near me. Has anyone had experience with the Makita Sharpener or can recommend a place where I can send knives for sharpening. Thanks Wayne |
#5
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Jointer knife sharpening
I was bought a Tormek a couple of years ago, I had always resisted cause I
thought I could get good edges with my waterstones. What a difference and fast. If you do a lot of work its a good buy, the accessories are expensive though. Bernard R "Wegge" wrote in message ... I have 3 sets of dull (not nicked) jointer knives that need sharpening desperately. I can't decide if I should send them out somewhere for sharpening or purchase a grinder such as the Makita 9820-2 Sharpener. I live in the northern boondocks of Minnesota and there isn't a sharpening service anywhere near me. Has anyone had experience with the Makita Sharpener or can recommend a place where I can send knives for sharpening. Thanks Wayne |
#6
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Jointer knife sharpening
Beautiful tool, but, as noted, pricey. I do my planer knives too, and they
require more frequent sharpening. Was a pain (boondocks of northern Michigan) to send them out, and the locals butchered them for $0.30 an inch. Bit the bullet, and now I end up doing the school's, neighbors' and such. Favor or wood swap, mostly. Now, there is a variation I used a few times to repair the commercial job or avoid it altogether before I got the Makita. It uses a holder, kerfed on the proper angle to make the bevel parallel to the table, and a hollow-bottomed cone stone chucked in your drillpress. It was published, at the least, in Fine Woodworking, and worked perfectly. Wedged the blades into the slot with paper on one side, touched the top of the highest spot with the cone, then locked it in height. After the first pass, with the cone on lowest speed, I put a piece of paper under the jig, taking off another paper thickness. Went through the blades, usually no more than two thicknesses of paper, cutting all at the proper length, then quick honed the wire edge. Worth a try, and gives good, predictable results. "Wegge" wrote in message ... I have 3 sets of dull (not nicked) jointer knives that need sharpening desperately. I can't decide if I should send them out somewhere for sharpening or purchase a grinder such as the Makita 9820-2 Sharpener. I live in the northern boondocks of Minnesota and there isn't a sharpening service anywhere near me. Has anyone had experience with the Makita Sharpener or can recommend a place where I can send knives for sharpening. Thanks Wayne |
#7
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Jointer knife sharpening
I had a significant nick in both jointer knives, and I was in the
middle of a project and on a Sunday--couldn't get anything sharpened. I use the "Scary Sharp" system of sandpaper sharpening with a veritas jig, but the jig wouldn't fit the jointer knives. I was able to orient the beveled edge of the knife on the glass by rocking it until I was sure it was the right angle, then I could maintain the sharpening angle by hand. It took me about an hour working through the grit sequence, but I was able to restore a perfect edge. Of course a jig would give you more security and be "fool-proof." Mr. Fixit eh. |
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