A91-SSD_US-EN

DRILLING | Structural Steel SoluƟons | 4TEX® Indexable Drill

Insert Geometry Recommendations | Troubleshooting

A

4TEX® Indexable Drill

DRILLING

Insert Geometry Recommendations

Geometry

B

Hardness (BHN) 100 - 150 150 - 250 250 - 350

ISO Material

P

M

K

N

H

Structural Steel

P

A36, A285, A516, etc.

BORING

C

Troubleshooting

REAMING

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

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

1.

7.

Starting on Angled Surfaces • Reduce entry feed by 20 - 50% • Use lower rake geometry if insert chipping occurs

8.

2.

D

BURNISHING

Angled Bore Exit • Reduce entry feed by 50% on breakout • Use tough insert and stable corner radius

9.

3.

Drilling Through Stacked Plates • Not recommended

10.

Starting on Convex Surfaces • Reduce entry feed by 50% • Use lower rake geometry if insert chipping occurs

4.

E

Opening an Existing Hole • Use flood coolant

11.

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

THREADING

5.

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

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.

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

6.

X

SPECIALS

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