A91-SSD_EU-EN

DRILLING | Structural Steel SoluƟons | 4TEX® Indexable Drill

Insert Geometry RecommendaƟons | TroubleshooƟng

4TEX® Indexable Drill

A

DRILLING

Insert Geometry RecommendaƟons

Geometry

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

ISO Material

P

M

K

N

H

B

Structural Steel

P

A36, A285, A516, etc.

BORING

C

TroubleshooƟng

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

REAMING

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

1.

7.

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

8.

2.

D

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

9.

BURNISHING

3.

Drilling Through Stacked Plates • Not recommended

10.

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

4.

Opening an ExisƟng Hole • Use flood coolant

11.

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

E

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

THREADING

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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