Thanks. Now I can picture it. Terry Farrell On Aug 12, 2010, at 2:22 PM, tnrwim at aol.com wrote: > > Some folks complain about pictures placed in forum posts. My > complaint is a lack of pictures. My limited cranial capacity will > not form a workable picture of what is described below. If the dowel > is bolted to the depth guide, won't the dowel advance downward at > the same rate as the drill bit? How does that "release the bit"? > Sorry, just can't picture what this dowel is doing. > > Terry Farrell > Terry > > I don't completely understand why it happens, but when the dowel, > which does come down at the same rate as the drill bit, contacts the > pin block, it "releases" the drill bit, and allows it to come back > out of the block. > > The dowel is about 6" long. To make sure it does it's job, before I > start drilling, I lower the drill to the side of the block, and look > to see that the bit is about 1/8" past the bottom of the block. > That's the point the dowel should touch the top of the block. When > each hole is drilled, when the bit goes through the bottom of the > block, that's the point at which to dowel hits the top of the block. > The drill is brought back up, and the block stays where it is, > without having to hold on to it, or clamp it down. > > Wim > > > > -----Original Message----- > From: Terry Farrell <mfarrel2 at tampabay.rr.com> > To: pianotech <pianotech at ptg.org> > Sent: Wed, Aug 11, 2010 11:53 pm > Subject: Re: [pianotech] pinblock drilling clamp > > Some folks complain about pictures placed in forum posts. My > complaint is a lack of pictures. My limited cranial capacity will > not form a workable picture of what is described below. If the dowel > is bolted to the depth guide, won't the dowel advance downward at > the same rate as the drill bit? How does that "release the bit"? > Sorry, just can't picture what this dowel is doing. > > Terry Farrell > > On Aug 12, 2010, at 3:55 AM, tnrwim at aol.com wrote: >> I had the same problem you describe, the pin block riding up on the >> bit. I used to hold the block down with my forearm, but that >> seriously bruised it. What I wound up doing is attaching a dowel to >> the guide, which on your press is to the left of the chuck. I >> drilled a 5/8" hole in one end of a 3/4" dowel, and attached a 5/8" >> diameter T-Nut. On the guide, I put a 5'8" bolt, and screwed the >> dowel to the bolt. The dowel is long enough so that when the drill >> is all the way through the block, the bottom of the dowel would hit >> the pin block. That would release the bit, and you're ready to >> drill the next hole. No clamp to tighten and release, and no >> bruised forearm. >> Wim > -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://ptg.org/pipermail/pianotech.php/attachments/20100813/4b456421/attachment.htm>
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