Hi,Bill! I had tried to find you in PTG directory to call you and explain how to make tapered drills.. Brad Point Hammer shank Drill 7/32"" can be purchased from our suppliers.. If you have a Grinder in your shop: a]practice on another smaller drill to reduce it's diameter starting about 3/4" above the drill tip.Grind it to a taper and don't forget to COOL the drill while dong it. After you get a feel of it,then taper that Brad Point drill,but don't do anything to the brad point,protect it.Brad point will help you to get a good start. Pre-tapered drill will help you to have a better control and prevent you from damaging the catcher.Again,practice on a 'dummy" catcher.. For more serious repairs I would recommend to attend Jim Bisby's class- demonstration on how to install a set of Bridle straps the old Fashion Way,without the corks.. Jim has a nice and efficient system to do it and it WORKS. If you have more questions-see me in Vegas,I will cover that topic in one of my classes.. Tapered drills work well in removing old felt from Grand Damper Guide Rails,too Ron also gave you a nice suggestion do drill with the Rasp Drill in reverse...I'm going to experiment with it next week..Thanx,Ron! Good luck.. Isaac.. On May 22, 2010, at 9:17 AM, Bill Costanzo wrote: > Thanks for all the responses, even the attempts at bridal humor. > > I think I’ll try careful drilling first, and if that fails I may be > forced to use clip-ons. > > Isaac, would you be kind enough to explain how to make a tapered > drill bit? > > Thank you > Bill Costanzo > > > > From: pianotech-bounces at ptg.org [mailto:pianotech-bounces at ptg.org] > On Behalf Of Bill Costanzo > Sent: Thursday, May 20, 2010 12:06 PM > To: Pianotech > Subject: [pianotech] Bridal Straps > > I have a question about a Heinzman upright I am reconditioning. > (mouse infested, but not too bad) It also has had some previous > reconditioning including restringing and new hammers (on old shanks > and butts, unfortunately). The straps had also been replaced but > need to be replaced again. The problem is that the corks have been > glued in with industrial strength glue and won’t come out. I can cut > the strap flush with the cork and use clip-ons, or I can cut the > bottoms off the catchers and use clip-ons. I’m interested in knowing > what anyone else has done in this situation and opinions about which > way will yield the better looking results. I should mention that I > broke one of the catchers at the cork hole already so I’m leaning > towards removing the bottom half of the catcher. Also what tool > would you use to cut with, side cutters, shank nippers? > > Thanks > Bill Costanzo -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://ptg.org/pipermail/pianotech.php/attachments/20100522/5b52b31e/attachment.htm>
This PTG archive page provided courtesy of Moy Piano Service, LLC