After I am satisfied that the bridge pin locations are okay on the new bridge cap, I need to prepare to drill the holes to receive the bridge pins. This is done before the bridges are notched. I use a special set of center punches to put indentations on the top of the bridge before drilling. These are 3 equally spaced punches on one tool. There are varying widths to accommodate various piano bridge designs. After the bridge pin locations have been punched, the top of the bridge is dyed black and a lubricant is placed on to of the dyed wood. Now I drill each pin hole at .003" smaller diameter than the pin being used. Ready for notching!
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