PLDS Indexable Centering & Chamfering Cutter Machining Tips
For Centering, Make the Centering Diameter Smaller than the Drill Diameter
Centering
Drilling
Countersinking
Innappropriate Center Diameter Relative to the Drill Diameter
Centering that Also Serves as Countersinking
Center remnants may occur at the bottom of the hole due to the shape of the insert, which may adversely affect the drilling process.
When the centering diameter becomes larger than the drill diameter, the shoulder of the drill will collide with the workpiece, which may cause chipping on the cutting edge.
Bottom tip shape
Center remnants
372
Drilling Technical
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