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
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