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DRILLING | 4TEX® Drill: Indexable Insert Drilling System

Troubleshooting

XTP TAP TAS HPU APX 4TX REV OPN SSD ACP BTA WHL CRT ALV BRN THM

Starting on Uneven Surfaces • Reduce entry feed by 50% if necessary

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Starting on Angled Surfaces • Reduce entry feed by 20 - 50% • Use lower rake geometry if insert chipping occurs Angled Bore Exit • Reduce entry feed by 50% on breakout • Use tough insert and stable corner radius Starting on Convex Surfaces • Reduce entry feed by 50% • Use lower rake geometry if insert chipping occurs

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Drilling Through a Cross Hole • Reduce feed rate 50% if necessary

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• Use good coolant flow and monitor chip packing • Use lower rake geometry if insert chipping occurs

Drilling on a Groove or Large Centering Box • Reduce entry feed • Use lower rake geometry for center insert

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Chain Drilling • Use good coolant flow • Reduce feed rate by 50% for interrupted cut • Use lower rake geometry if insert chipping occurs Starting on an Edge • Reduce entry feed rate by 50% • Use lower rake geometry if insert chipping occurs Starting on a Welded Seam • Reduce entry feed rate by 50% • Use lower rake geometry if insert chipping occurs

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Drilling Through Stacked Plates • Not recommended

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Opening an Existing Hole • Use flood coolant

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Adjustable • For mills, use eccentric sleeve with end mill holder • For lathes, use x-axis to adjust offset Ø NOTE: Refer to maximum offset Ø in data tables

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