Bob Hull said: "Background: Yesterday I was trying to repair an Everett console that had a separation crack between the last lamination of the pinblock and the back beam. I guess it's glue joint failure and a downward warping of the wood from the downward pull of the tuning pins. I made plans to install 3 bolts 3/8" x 5"L after applying CA down in the crack. However, drilling through the plate took about 45 minutes to do 1 hole. I used a carbide tipped masonry bit per the suggestion of a industrial machine tool and supply co. I also tried using a 1/4" bit first and then progressing to a 3/8" bit. So, I wound up just installing 1 bolt due to time restraints. I have done this repair a few times before but it's been awhile and I don't remember it taking this long to drill thru the plate. I used a good low rpm electric drill vsr 0-600 rpms. Any drill bit recommendations?" Bob, Just use a Sharp Jobbers Bit and be done with it! No need to use a carbide bit, IMO. Also, use a high speed/torque drill! IMO, you got bum advice from the machine tool jjoint! Joseph Garrett, R.P.T. Captain, Tool Police Squares R I -------------- next part -------------- An HTML attachment was scrubbed... URL: https://www.moypiano.com/ptg/pianotech.php/attachments/20060824/3fa9f203/attachment.html
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