A91-SSD_US-EN

DRILLING | Structural Steel Replaceable Insert Drilling System

T-A® Drill Nomenclature

A

T-A Drill Inserts

DRILLING

4

5

3

H - 0115 - HE

1

2

3

4

5

6

1. Insert

2. Material

3. Series

4. Coating

5. Diameter

6. Geometry

1 = T-A

5 = Super cobalt

0 = 0 series 1 = 1 series 2 = 2 series 3 = 3 series

H = AM200®

0017 = Inch

TW = Thin Wall

B

4 = GEN2 T-A

C1 = C1 (K35) carbide

A = TiAlN

.515 = Decimal

NP = Notch Point® SS = Structural Steel HE = High Efficiency

13 = Metric

BORING

T 1

D 1

Reference Key Symbol

Attribute

C

132°

D 1 T 1

Insert diameter Insert thickness

REAMING

T-A Drill Holders

2

40

20

S - 004 IS

060

1

2

3

4

5

6

7

D

1. Holder

2. Length

3. Series

4. Flute

BURNISHING

2 = T-A holder

20 = Short

00 = 0 series 05 = 0.5 series 10 = 1 series 15 = 1.5 series

20 = 2 series 25 = 2.5 series 30 = 3 series

S = Straight H = Helical

40 = Standard 50 = Extended

60 = Long

5. Shank Designator

6. Shank Code

7. Minimum Insert Diameter

E

003 = 3MT 004 = 4MT

In increments of 1/64 of an inch

IS = Imperial Morse taper structural steel

THREADING

Reference Key Symbol Attribute

L 1

Symbol Attribute

L 4

D 1

L 4 P 1 P 2

Drill insert range Overall length

Flute length Rear pipe tap Side pipe tap

P 2

L 1 L 2 L 3

X

D 1

Drill depth

MT

Holder reference length

Morse taper size

L 2

MT

P 1

L 3 * Holder reference length *If using Structural Steel holder with Notch Point®, T-A GEN2, or 150° Structural Steel T-A drill insert geometry

SPECIALS

L 3 *

L 3

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A91: 21