620

The part was marked using a 20-watt q-switched ytterbium fiber laser with 160mm focal length lens. The small and medium drill bits were surface annealed at approximately 17 watts of power, at a speed of 4 inches per second, with a frequency of 75kHz, resulting in cycle times of 4.39 seconds and 4.74 seconds, respectively. The large bit was surface etched to produce a contrasting mark. The large bit was marked using approximately 8 watts of power, with a frequency of 35kHz, and at a speed of 20 inches per second, resulting in a cycle time of 0.94 seconds.