Center punch the end of the shaft.
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This will ensure the drill bit starts in the center of the shaft when drilling the pilot hole.
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To make finding the center of the shaft easier, I placed the CV Output Flange over the cut-off shaft. This made the visible surface area change from about 1.25" diameter to 0.5" diameter.
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Make sure you hit the centerpunch hard enough to put a dent in the end of the shaft deep enough for a 1/8" drill bit to sit in.
