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Letter I, 145 Degree Point, Solid Carbide Drill - 50021

SERIES: 120

Series 120 - CFRP 8 Facet

Letter I, 145 Degree Point, 5/16" Shank Dia, 3-1/8" OAL, 2 Flute, 3xD, Di-NAMITE (Diamond) Coated, Series 120, Series 120 - CFRP 8 Facet, Solid Carbide Drill - 50021

Feature & Benefits

  • Double margin design stabilizes the drill for greater hole accuracy and improved surface finish
  • Notched point reduces thrust force over conventional designs
  • 8 facet point reduces fiber breakout and delamination on exit
  • 90 degree secondary chamfer angle improves hole entrance and exit quality

SKU / EDP50021
CategorySolid Round Tools > Holemaking > High Performance Drills
Min Order Qty1
Series120
Series DescriptionSeries 120 - CFRP 8 Facet
High PerformanceYes
Unit (inch/mm)inch
Number of Flutes2
Primary Workpiece Material(N) Non-Ferrous Materials
Reach (xD)3xD
SizeI
Cutting Diameter (DC) (Decimal Inch)0.2720
Cutting Diameter (DC) (mm)6.91
Shank Diameter (DCON) (Decimal Inch)0.3125
Shank Diameter (DCON) (Fractional Inch)5/16
Shank Diameter (DCON) (mm)7.94
Usable Length (LU) (Decimal Inch)1.0469
Usable Length (LU) (Fractional Inch)1-3/64
Usable Length (LU) (mm)26.59
Flute Length (LCF) (Decimal Inch)1.3120
Flute Length (LCF) (mm)33.32
Overall Length (OAL) (Decimal Inch)3.1250
Overall Length (OAL) (Fractional Inch)3-1/8
Overall Length (OAL) (mm)79.38
Shank Length (LS) (Decimal Inch)1.4380
Shank Length (LS) (mm)36.53
Point Angle (Degree)145
Cutting Diameter (DC) Tolerance (Decimal Inch)+.00000 / -.00050
Cutting Diameter (DC) Tolerance (mm)+.0000 / -.0127
Shank Diameter (DCON) Tolerance (ISO)h6
Shank TypeStraight
Weldon FlatNo
Coolant OptionExternal Coolant
Coating DescriptionDiamond (Di-NAMITE)
Additional GeometryRight Hand Cut Direction (RHC)
Helix AngleRight Spiral
Helix Angle (Degree)20
Variable HelixNo
Center CuttingNo
Chip BreakerNo
Primary Chamfer Angle (a) (Degree)145
Secondary Chamfer Angle (a) (Degree)90
Number of Margins4

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