It will bore vertical as well as grand hammers. There is a rake on some grand hammers as well. The rake angle is achieved by changing the angle of the drill press platform. If you are using a small drill press with a fixed platform you have to shim up one side of the boring jig. The rake angle is not adjustable on the jig itself. David Love www.davidlovepianos.com -----Original Message----- From: pianotech-bounces at ptg.org [mailto:pianotech-bounces at ptg.org] On Behalf Of Mark Dierauf Sent: Saturday, May 02, 2009 6:32 AM To: Pianotech Subject: [pianotech] Renner hammer boring jig Does anybody know if this jig will bore vertical hammers as well as grands? I'm particularly wondering if it is capable of boring the extreme rake angle found on the old S&S uprights. Thanks, - Mark
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