A55-4TX_US-EN

DRILLING | 4TEX® Drill: Indexable Carbide Insert Drilling System

Troubleshooting

A

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

DRILLING

1.

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

2.

B

3.

BORING

4.

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

5.

C

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

REAMING

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

6.

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

D

7.

BURNISHING

8.

9.

E

THREADING

Drilling Through Stacked Plates • Not recommended

10.

Opening an Existing Hole • Use flood coolant

11.

X

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

12.

SPECIALS

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A55: 37