Step Drilling Deep Holes: Techniques and Precautions
I use step drilling when the bore needs multiple diameters along its length. Step drilling creates a bore with different diameters at different depths, like a counterbore for a bolt head or a stepped shaft bore for hydraulic applications. It can also help manage chip evacuation and tool deflection in deep holes. When to Use Step Drilling vs Single Diameter Step drilling is not always the right choice. I use it in specific situations where a single-diameter hole will not work. Here is how I decide. ...