Kumun R. Vakil - Rancho Palos Verdes CA, US
Northrop Grumman Corporation - Los Angeles CA
408110, 408130, 408 1 R, 408224
A drilling apparatus includes a drill, a surge control device and a countersink limiter coupled to the drill, and a rotatable cutting tool coupled to the countersink limiter. The cutting tool includes a drilling portion operable to form a hole, a countersink portion operable to form a countersink, and a fillet portion operable to form a longitudinally-curved transition between the hole and the countersink. The depth of the countersink is controlled by the countersink limiter. The surge control device is operable to control the axial speed of the cutting tool.