Centroid Rigid Deep Hole Tapping 60 #10-32 holes 1/2" deep in ductile cast iron. Video by Tom B. Programmed with Centroid's Intercon Conversational Programming software.
Tom says. "I REALLY, REALLY love rigid tapping and wish I'd added it to my mill years ago. Here's a quick video finishing up tapping 60 #10-32 holes 1/2" deep in ductile cast iron. Making a new poly-v belt sheave for my lathe - holes are to balance the spindle after installation. I had just finished doing 126 #6-40 holes 3/8" deep in three other cast iron pulleys. These were straight flute semi-bottoming taps for cast iron. I chose to peck tap just to make sure the chips were cleared out of the hole since there was only 0.050" clearance at the bottom of the blind holes."
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