This is a multi-part message in MIME format. ---------------------- multipart/mixed attachment ------=_NextPart_84815C5ABAF209EF376268C8 Terry, Recently faced the same problem on my first and only vertical hitch pin conversion. Bass bichord hitch pins alternated fore and aft, but still not enough space to make me feel comfortable picking a new location. Old pins were reasonable tight, so I left them in place, ground them flush with the top of the plate, and drilled the new holes down through the center of the originals. 3/16 diameter (larger than the originals at .156) and 9/16 deep (considerably deeper than originals). Thus the top and the bottom of the new hole are in fresh cast iron. Needed the drill press because the original pins were harder than surrounding cast iron - couldn't push the drill in by hand. See photo. New pins will be 3/16 x 1", with 7/16" exposed. If I set the height of the new bass bridge cap correctly, the loops will rest about 1/8 above the plate. Mike ----- Original Message ----- From: Farrell To: pianotech@ptg.org Sent: 6/21/2005 2:39:41 PM Subject: Hitch Pin Plate Drilling I'm about to drill a plate for vertical hitch pins. On the few plate I've done this to, I've always had enough fore-and-aft room in the hitch pin area to place the new hitch pin at a desirable location, and not be real close to the original hitch pin. Unfortunately, on the plate I need to drill, the hitch pin area is relatively narrow and I can't go very far fore or aft with the new location. I can only assume that the original steel pin is a lot harder than the cast iron and I must avoid hitting it. Agree? Any general advice on placing the new hitch pins in a situation like this from those who have crossed this bridge (or rather hitch pin area) before? I could go immediately aft of the originals, but that would put all pins in one line - although the originals held up for 100 years in that array. Should I just do that and not worry about it? Terry Farrell ------=_NextPart_84815C5ABAF209EF376268C8 An HTML attachment was scrubbed... URL: https://www.moypiano.com/ptg/pianotech.php/attachments/bb/62/e4/ff/attachment.htm ------=_NextPart_84815C5ABAF209EF376268C8-- ---------------------- multipart/mixed attachment A non-text attachment was scrubbed... Name: Plate 003c.jpg Type: image/jpeg Size: 264774 bytes Desc: Plate 003c.jpg Url : https://www.moypiano.com/ptg/pianotech.php/attachments/7d/d8/1b/b7/Plate003c.jpg ---------------------- multipart/mixed attachment--
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