Tool Selection Guide Choosing the Correct Small Hole Boring Bar 5 Select the appropriate insert based on style, grade, and geometry. 6 Determine the Speed and Feed Chart with the appropriate cutting data. A Based on grade and edge geometry, identify starting speed (vc) and feed (fz). The first choice starting feed is in bold. B Use the corresponding speed located in the same column below the feed information. A B B widia.com D7