A91-SSD_US-EN

DRILLING | Structural Steel SoluƟons | 4TEX® Indexable Drill

Insert Geometry RecommendaƟons | TroubleshooƟng

A

4TEX® Indexable Drill

DRILLING

Insert Geometry RecommendaƟons

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

TroubleshooƟng

REAMING

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.

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

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.

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

4.

E

Opening an ExisƟng 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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