This is a multi-part message in MIME format. ---------------------- multipart/mixed attachment Several posts have asked about "in the piano pin block drilling machines". I'll share mine. The attachment dpleft shows a "white board, a foot wide particle board covered with white plastic. This is reinforced with a piece of 3/4 thick plywood about inches wide at the rear and a 2 inch wide piece of 1/8 inch aluminum at th front. This could be thicker for more strength. A drill press is slid left to right and the white board is slid fore and aft on a couple of terry cloth towels on the rims. Talcum powder can lube the sliding. Shown is a "cold gun" that shoots cold air on the drill bit. This allows you to drill a complete block and still put you hand on the drill. It is that cool. If you use the two pass drill you may not need this. It is very effective when making pin block plugs, however. You may drill through the plate with a 3/8 drill and plug for a later pass with an appropriate size drill for no 1 or 2 pin. If you are pulling the plate a 1 inch plug would be more appropriate. You'll notice a six inch drill in use. Select a size that will give a decent fit for the plug. You may need to use a metric size. A good machinist supply house will have all the sizes. I have a drill chuck that I have put a 3/8 bolt in the business end and then chucked a 3/8 drill rod and then turned the bolt on a lathe for good concentricity and used that for an extension. Now look at the other attachment. A five speed drill press is available for 39 to 59 dollars. Modify as shown so that the press can be lowered as required with the shown Allen wrench. Two screws are used. The throw of the drill is 2 inches minimum. The leverage of the handle gives full stroke with about one third rotation of the handle. Feed gently, since the floating drill press will rise up and change angle if it is fed too heavily. Joe Garrett doesn't have that problem with his 800 pound machine but I can put mine on a shelf out of the way. I can lift it even at my age. In anticipation of a question, if you want to drill holes on the bias, just throw a dowel of the required diameter under the back side of the sliding member or in the front if you really want to tilt the pin forward. I like 90 degrees in most cases. Two four foot pieces of unistrut can be used under the block with appropriate bolts and nuts for adjustment for stability. Dumb questions are always welcomed, of course. I have more pictures. Smart ass answers, too. Carl Meyer PTG assoc Santa Clara, Ca. ---------------------- multipart/mixed attachment A non-text attachment was scrubbed... Name: dpmod.jpg Type: image/jpeg Size: 44207 bytes Desc: not available Url : https://www.moypiano.com/ptg/pianotech.php/attachments/30/4e/94/04/dpmod.jpg ---------------------- multipart/mixed attachment A non-text attachment was scrubbed... Name: dpleft.jpg Type: image/jpeg Size: 48770 bytes Desc: not available Url : https://www.moypiano.com/ptg/pianotech.php/attachments/24/d1/7a/7a/dpleft.jpg ---------------------- multipart/mixed attachment--
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