Probe of the Month January 2014

January's Probe of the Month is an M5 stylus, 56.5 mm long, with a 2.0 mm ruby ball at the tip and a 1.5 mm carbide stem.  The base is stainless steel.  It weighs 7.01 grams. 

It's unusual to see a stylus with so little clearance between the ball and the stem. All pieces must be concentric during assembly to prevent "shanking" during use.  Our client, a Texas-based manufacturer, ordered six.  The styli were shipped the following day.