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* 3/8 inch
* 3/8 inch
* 10 mm
* 10 mm
With the pen blank inserted in the lathe chuck in approximate position but with the jaws loose, slide the tailstock with the Jacob's chuck and the drill installed, and the tailstock ram fully retracted, to contact the stock. Lock the tailstock. Push the stock onto the brad point of the drill at the marked center point and then tighten the jaws on the other end of the stock. Power on the lathe and crank the tailstock ram to drill into the stock. Once the ram limit is reached, stop the lathe, retract the ram, side the tailstock closer until the drill makes contact with the bottom of the hole, lock the tailstock, and repeat.
Pro Tips: When the drill emerges from the end grain, it can tear out wood. Make sure the blank is long enough so that the pen tube can be inserted in the hole without contacting any part of the hole with tear out. Masking tape placed over the end grain can help reduce tear out. Place tape on the drill bit so one knows how far to drill into the blank.