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Woodturning (rec.crafts.woodturning) To discuss tools, techniques, styles, materials, shows and competitions, education and educational materials related to woodturning. All skill levels are welcome, from art turners to production turners, beginners to masters. |
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#1
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Wood Boring
Hi folks,
I need to bore a 7/8" hole all the way through a 2" square piece of wood, end to end. How is such a thing done? Not interested in spending thousands of dollars on equipment but need to get it done. Thanks, Jerry |
#2
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I don't believe you said how long the piece is.
Anyway, clamp the piece in a drill vise and be very sure that it is vertical. Find the center accurately and mark it with a center punch. Put a Fostner bit in the drill press chuck. Clamp the vise to the table when you have located the punch mark under the spur of the bit. Then drill as deep as you can, raising the bit frequently to clear out the chips. Remove the Forstner bit, install an electrician's bit which can be as long as 18 inches, in the chuck and keep on drilling. I have done this many, many times when making lamps. I just realized that you may not have a drill press and only an electric hand drill. You can find some excellent guides to start the drill straight. Peace ~ Sir Edgar =F8=F8=F8=F8=F8=F8=F8=F8=F8=F8=F8=F8=F8=F8=F8=F8=F 8=F8=F8=F8=F8=F8=F8=F8=F8= =F8=F8=F8=F8=F8=F8=F8=F8=F8=F8=F8=F8=F8 |
#3
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"Jerry Maske" wrote in message ... Hi folks, I need to bore a 7/8" hole all the way through a 2" square piece of wood, end to end. How is such a thing done? Not interested in spending thousands of dollars on equipment but need to get it done. Thanks, Jerry Jerry, the most accurate way to do this is to spin the piece of wood, and then introduce the bit into the end of the spinning wood. The action of the spinning wood tends to keep the bit centered. Obviously, you would need to clamp/secure one end of the wood to the spindle end of the lathe, and support the other end in a steady rest. Also, turn an entry hole so it is centered. Then introduce the drill bit as straight as you can manage. Fostner bits, electricians' bits, etc. do not necessarily drill straight. Crooked grain will cause them to run out. The straightest holes are drilled with 'D' drills. This is a solid drill bit which has the same diameter as the hole you want to drill. Drill rod works great. Along one side of the drill rod grind a flat. This flat should be less than 50% of the diameter. The most accurate drills are ground so that 75% of the circumference of the drill is undisturbed. Usually this is accomplished by grinding a groove the length of the drill. The leading end of the drill is then ground so that the cutting edge is the edge of the groove. The opposite edge is releived all the way around to the cutting edge. I make my drill bits by mounting the blank in a recess in a 2x4, installing a 1/8" thick grinding wheel (or thicker, depending on the drill desired) on my table saw, then sliding the 2x4 against the rip fence with the right edge of the grinding wheel centered on the drill. The cut is very light, but you raise the wheel until you cut just to the very center of the drill. Then grind the approporiate angles on the end. Start a very short entry hole with a skew or other tool. Lubricate the drill bit with wax and withdraw many times to clean the shavings from the groove. This is a slow way to drill a hole, but it is very accurate. Incidentally, the end of the drill can be square, or pointed slightly--it makes no difference. Regards, James R. Johnson |
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