Original T-A®   
Original T-A is an excellent choice for general purpose use. The design provides fast penetration rates that produce good hole size and finish. Standard geometry combines highly efficient and stable cutting action to minimize power consumption. Recommended for use in most steels, cast irons, high temperature alloys and aluminum alloys.
Advantages
  • Optimizes chip evacuation
  • Effective heat dispersion
  • Multiple geometry options
  • Accurate positioning
  • Eliminates center drilling
  • Increases point strength
Features
  • Through coolant
  • Corner clips
  • Self-centering point
  • Web Thin geometry
Recommended Materials  
Materials
x
Steel
High Temp Alloy
Stainless Steel
Hardened Steel
Cast Iron
Aluminum
Icon Reference




Recommended Industries  
Industries
x
Medical
Renewable Energy/ Energy
Automotive
Aerospace
Firearms
Agriculture
Oil and Gas
Marine
General Production
Heavy Equipment
Hydraulics
Tool, Mold, and Die
Structural Steel Fabricator
Icon Reference



Original T-A: Rotate
Original T-A: Rotate
Original T-A Angle
Original T-A Side 1
Original T-A Side 2
Original T-A Explosion
Original T-A Close
Technical Information

Product Specifications
Product Type
Replaceable Drill Insert
Diameter Range
0.374” to 4.5” | 9.5mm to 114.3mm
Substrate Options
HSS, Super Cobalt, Premium Cobalt, C2(K20), C3(K10), C5(P40)
Coating
TiN, TiAlN, TiCN
Holder
Original T-A Holder
Flute Options
Straight or Helical
Shank Options
Flange, Straight, Morse Taper, ER Collet
Drill Depth
1xD up to 28xD
Coolant
Coolant Through

Product Nomenclature
Original T-A Inserts
Insert
x
1 = Original T-A
1
Material
x
3 = HSS
5 = Super Cobalt
8 = Premium Cobalt
C1 = C1 (K35) carbide
C2 = C2 (K20) carbide
C3 = C3 (K10) carbide
C5 = C5 (P40) carbide
8
Series
x
Y = Y series
Z = Z series
0 = 0 series
1 = 1 series
2 = 2 series
3 = 3 series
4 = 4 series
5 = 5 series
6 = 6 series
7 = 7 series
8 = 8 series
2
Coating
x
H = AM200®
A = TiAIN
N = TiCN
T = TiN
T
-
Diameter
x
0017 = Inch
.515 = Decimal
13 = Metric
0031
-
Geometry
x
Blank = Standard
AN = Aluminum
BR = Brass
BT = BT-A Specific
CI = Cast Iron
CN = Cast Iron with Notch Point®
CP = Cam Point
CR = Corner Radius
FB = Flat Bottom
HI = High Impact
HR = High Rake


 
IN = High Impact with Notch Point®
NC = Standard without Chipbreakers
NP = Notch Point®
RN = High Rake with Notch Point®
SK = Special Corner Prep
SP = 90˚ Spot and Chamfer
SS = 150˚ Structural Steel
TC = Tiny Chip
TW = Thin Wall
 
TC
Original T-A Holders
- (also used with Gen2 T-A)
Holder
x
2 = T-A Holder
2
Length
x
10 = Stub
20 = Short
30 = Intermediate
40 = Standard
45 = Standard Plus
50 = Extended
60 = Long
65 = Long Plus
70 = XL
90 = 3XL
30
Series
x
Y0 = Y series
Z0 = Z series
00 = 0 series
05 = 0.5 series
10 = 1 series
1.5 = 15 series
20 = 2 series
25 = 2.5 series
30 = 3 series
40 = 4 series
50 = 5 series
70 = 7 series
20
Flute
x
H = Helical
S = Straight
S
-
Shank Designator
x
Morse Taper 
002 = 2MT
003 = 3MT
004 = 4MT
005 = 5MT
 
Imperial
063 = 5/8"
075 = 3/4"
100 = 1"
125 = 1-1/4"
150 = 1 1/2"
175 = 1-3/4"
200 = 2"
300 = 3"
Metric
16 = 16mm
20 = 20mm
25 = 25mm
32 = 32mm
40 = 40mm
50 = 50mm
004
Shank Code
x
I = Imperial Morse Taper
M = Metric Morse Taper
L = Lathe Shank
F = Flanged Shank
FM = Flanged Metric Shank
I
T-A® Drilling System
General Purpose Drilling

Available Online Only

Recommended Cutting Data
Original T-A® Carbide
Original T-A® Flat Bottom Carbide
Original T-A® HSS
Original T-A® Flat Bottom HSS

Additional Resources