Structural Steel Solutions

Our adress:

Darmet sp. z o.o.
Zakład Obróbki Skrawaniem
Komunalna 4c street, 15-197 Białystok

Our e-mail:

+48 85 664 75 34

T-A® Structural Steel Drilling System is designed for use on structural steel materials. This system delivers outstanding performance and durability.

Advantages

TiAlN and AM200® insert coatings increase tool life in MQL applications
Multiple geometries available
Holders are compatible with GEN2 T-A® inserts for increased performance

Features

150º Structural Steel Geometry for reduced exit burr
NotchPoint™ Geometry for improved hole straightness
Thin Wall Geometry for materials under 7/16" (11 mm) thick
Morse Taper shanks with through shank coolant capability
Various tool lengths to accommodate different reaches

Recommended Materials

Steel

Product Specifications

Pruduct Type	Replaceable Drill Insert
Diameter Range	0.511" - 1.882" (12.98mm - 47.80mm)
Coating	AM200®, TiAlN
Insert Material	Super Colalt, C1 (K35) carbide
Holder	Original T-A® Holder
Flute Options	Straight or Helical
Shank Options	3MT, 4MT, Imperial Morse Taper
Drill Depth	Short, Standard, Extended, Long
Coolant	Coolant Through

Product Nomenclature

T-A Inserts

4
1

5
2

3
3

H
4

-

0115
5

-

HE
6

1. Insert
1 = Original T-A 4 = GEN2 T-A

1. Insert

1 = Original T-A

4 = GEN2 T-A

2. Material
5 = Super cobalt C1 = C1 (K35) carbide

2. Material

5 = Super cobalt

C1 = C1 (K35) carbide

3. Series
0 = 0 series 1 = 1 series 2 = 2 series 3 = 3 series

3. Series

0 = 0 series

1 = 1 series

2 = 2 series

3 = 3 series

4. Coating
H = AM200® A = TiAlN

4. Coating

H = AM200®

A = TiAlN

5. Diameter
0017 = Inch .515 = Decimal 13 = Metric

5. Diameter

0017 = Inch

.515 = Decimal

13 = Metric

6. Geometry
HE = High Efficiency NP = Notch Point® SS = Structural Steel TW = Thin Wall

6. Geometry

HE = High Efficiency

NP = Notch Point®

SS = Structural Steel

TW = Thin Wall

Reference Key

Symbol	Atribute
D₁	Insert diameter
T₁	Insert thickness

T-A Drill Holders

2
1

40
2

20
3

S
4

-

004
5

IS
6

060
7

1. Holder
2 = T-A holder

2. Length
20 = Short 40 = Standard 50 = Extended 60 = Long

2. Length

20 = Short

40 = Standard

50 = Extended

60 = Long

3. Series
00 = 00 series 05 = 0.5 series 10 = 1 series 15 = 1.5 series	20 = 2 series 25 = 2.5 series 30 = 3 series

3. Series

00 = 00 series

05 = 0.5 series

10 = 1 series

15 = 1.5 series

20 = 2 series

25 = 2.5 series

30 = 3 series

4. Flute
S = Straight H = Helical

4. Flute

S = Straight

H = Helical

5. Shank Designator
Morse Taper 003 = 3MT 004 = 4MT

5. Shank Designator

Morse Taper

003 = 3MT

004 = 4MT

6. Shank Style
IS = Imperial Morse taper structural steel

7. Minimum Insert Diameter
In increments of 1/64 of an inch

Reference Key

Symbol	Atribute
D₁ L₁ L₂ L₃ L₃* L₄ P₁ P₂ MT	Drill insert range Overall length Drill depth Holder reference length Holder reference length Flute length Rear pipe tap Side pipe tap Morse taper size

Symbol

Atribute

D₁

L₁

L₂

L₃

L₃*

L₄

P₁

P₂

MT

Drill insert range

Overall length

Drill depth

Holder reference length

Flute length

Rear pipe tap

Side pipe tap

Morse taper size

Recommended Cutting Data

Structural Steel T-A


Metric	Imperial

A combination of a unique holder and insert designed specifically for the machines, material and environment commonly found in the Structural Steel Industry. Enhancements to both the insert and holder provide the superior chip formation, life, and toughness required for harsh drilling applications. The inserts are stocked in our C2 (K20) carbide grade with AM300® coating for optimal life.