- 0.6 mm diameter drilled ruby ball
This is one of several 0.6 mm (.024”) diameter ruby balls drilled at Q-Mark today. A steel gage pin protrudes from the blind hole in the ball to facilitate handling. The precision hole in the ruby ball is about 0.3 mm diameter x 0.3 mm deep.
Our capabilities amaze me at times. I grew up in a conventional machine shop about the time CNC controls first emerged. Machining anything like this tiny ruby ball would’ve been completely out of the question. The idea would’ve been greeted with hoots and laughter. Now, it’s just another day at Q-Mark.
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